mirror of https://github.com/SnapKit/SnapKit
547 lines
25 KiB
Swift
547 lines
25 KiB
Swift
//
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// Snap
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//
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// Copyright (c) 2011-2015 Masonry Team - https://github.com/Masonry
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#if os(iOS)
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import UIKit
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#else
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import AppKit
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#endif
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/**
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Used to expose the final API of a `ConstraintDescription` which allows getting a constraint from it
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*/
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public protocol ConstraintDescriptionFinalizable: class {
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var constraint: Constraint { get }
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}
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/**
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Used to expose priority APIs
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*/
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public protocol ConstraintDescriptionPriortizable: ConstraintDescriptionFinalizable {
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func priority(priority: Float) -> ConstraintDescriptionFinalizable
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func priority(priority: Double) -> ConstraintDescriptionFinalizable
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func priority(priority: CGFloat) -> ConstraintDescriptionFinalizable
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func priority(priority: UInt) -> ConstraintDescriptionFinalizable
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func priority(priority: Int) -> ConstraintDescriptionFinalizable
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func priorityRequired() -> ConstraintDescriptionFinalizable
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func priorityHigh() -> ConstraintDescriptionFinalizable
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func priorityMedium() -> ConstraintDescriptionFinalizable
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func priorityLow() -> ConstraintDescriptionFinalizable
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}
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/**
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Used to expose multiplier APIs
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*/
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public protocol ConstraintDescriptionMultipliable: ConstraintDescriptionPriortizable {
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func multipliedBy(amount: Float) -> ConstraintDescriptionPriortizable
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func multipliedBy(amount: Double) -> ConstraintDescriptionPriortizable
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func multipliedBy(amount: CGFloat) -> ConstraintDescriptionPriortizable
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func multipliedBy(amount: Int) -> ConstraintDescriptionPriortizable
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func multipliedBy(amount: UInt) -> ConstraintDescriptionPriortizable
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func dividedBy(amount: Float) -> ConstraintDescriptionPriortizable
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func dividedBy(amount: Double) -> ConstraintDescriptionPriortizable
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func dividedBy(amount: CGFloat) -> ConstraintDescriptionPriortizable
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func dividedBy(amount: Int) -> ConstraintDescriptionPriortizable
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func dividedBy(amount: UInt) -> ConstraintDescriptionPriortizable
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}
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/**
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Used to expose constant APIs
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*/
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public protocol ConstraintDescriptionOffsetable: ConstraintDescriptionMultipliable {
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func offset(amount: Float) -> ConstraintDescriptionMultipliable
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func offset(amount: Double) -> ConstraintDescriptionMultipliable
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func offset(amount: CGFloat) -> ConstraintDescriptionMultipliable
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func offset(amount: Int) -> ConstraintDescriptionMultipliable
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func offset(amount: UInt) -> ConstraintDescriptionMultipliable
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func offset(amount: CGPoint) -> ConstraintDescriptionMultipliable
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func offset(amount: CGSize) -> ConstraintDescriptionMultipliable
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func offset(amount: EdgeInsets) -> ConstraintDescriptionMultipliable
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func insets(amount: EdgeInsets) -> ConstraintDescriptionMultipliable
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}
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/**
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Used to expose relation APIs
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*/
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public protocol ConstraintDescriptionRelatable: class {
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func equalTo(other: ConstraintItem) -> ConstraintDescriptionOffsetable
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func equalTo(other: View) -> ConstraintDescriptionOffsetable
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#if os(iOS)
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func equalTo(other: UILayoutSupport) -> ConstraintDescriptionOffsetable
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#endif
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func equalTo(other: Float) -> ConstraintDescriptionMultipliable
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func equalTo(other: Double) -> ConstraintDescriptionMultipliable
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func equalTo(other: CGFloat) -> ConstraintDescriptionMultipliable
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func equalTo(other: Int) -> ConstraintDescriptionMultipliable
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func equalTo(other: UInt) -> ConstraintDescriptionMultipliable
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func equalTo(other: CGSize) -> ConstraintDescriptionMultipliable
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func equalTo(other: CGPoint) -> ConstraintDescriptionMultipliable
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func equalTo(other: EdgeInsets) -> ConstraintDescriptionMultipliable
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func lessThanOrEqualTo(other: ConstraintItem) -> ConstraintDescriptionOffsetable
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func lessThanOrEqualTo(other: View) -> ConstraintDescriptionOffsetable
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#if os(iOS)
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func lessThanOrEqualTo(other: UILayoutSupport) -> ConstraintDescriptionOffsetable
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#endif
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func lessThanOrEqualTo(other: Float) -> ConstraintDescriptionMultipliable
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func lessThanOrEqualTo(other: Double) -> ConstraintDescriptionMultipliable
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func lessThanOrEqualTo(other: CGFloat) -> ConstraintDescriptionMultipliable
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func lessThanOrEqualTo(other: Int) -> ConstraintDescriptionMultipliable
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func lessThanOrEqualTo(other: UInt) -> ConstraintDescriptionMultipliable
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func lessThanOrEqualTo(other: CGSize) -> ConstraintDescriptionMultipliable
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func lessThanOrEqualTo(other: CGPoint) -> ConstraintDescriptionMultipliable
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func lessThanOrEqualTo(other: EdgeInsets) -> ConstraintDescriptionMultipliable
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func greaterThanOrEqualTo(other: ConstraintItem) -> ConstraintDescriptionOffsetable
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func greaterThanOrEqualTo(other: View) -> ConstraintDescriptionOffsetable
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#if os(iOS)
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func greaterThanOrEqualTo(other: UILayoutSupport) -> ConstraintDescriptionOffsetable
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#endif
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func greaterThanOrEqualTo(other: Float) -> ConstraintDescriptionMultipliable
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func greaterThanOrEqualTo(other: Double) -> ConstraintDescriptionMultipliable
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func greaterThanOrEqualTo(other: CGFloat) -> ConstraintDescriptionMultipliable
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func greaterThanOrEqualTo(other: Int) -> ConstraintDescriptionMultipliable
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func greaterThanOrEqualTo(other: UInt) -> ConstraintDescriptionMultipliable
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func greaterThanOrEqualTo(other: CGSize) -> ConstraintDescriptionMultipliable
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func greaterThanOrEqualTo(other: CGPoint) -> ConstraintDescriptionMultipliable
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func greaterThanOrEqualTo(other: EdgeInsets) -> ConstraintDescriptionMultipliable
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}
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/**
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Used to expose chaining APIs
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*/
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public protocol ConstraintDescriptionExtendable: ConstraintDescriptionRelatable {
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var left: ConstraintDescriptionExtendable { get }
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var top: ConstraintDescriptionExtendable { get }
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var bottom: ConstraintDescriptionExtendable { get }
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var right: ConstraintDescriptionExtendable { get }
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var leading: ConstraintDescriptionExtendable { get }
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var trailing: ConstraintDescriptionExtendable { get }
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var width: ConstraintDescriptionExtendable { get }
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var height: ConstraintDescriptionExtendable { get }
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var centerX: ConstraintDescriptionExtendable { get }
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var centerY: ConstraintDescriptionExtendable { get }
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var baseline: ConstraintDescriptionExtendable { get }
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#if os(iOS)
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var firstBaseline: ConstraintDescriptionExtendable { get }
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var leftMargin: ConstraintDescriptionExtendable { get }
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var rightMargin: ConstraintDescriptionExtendable { get }
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var topMargin: ConstraintDescriptionExtendable { get }
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var bottomMargin: ConstraintDescriptionExtendable { get }
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var leadingMargin: ConstraintDescriptionExtendable { get }
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var trailingMargin: ConstraintDescriptionExtendable { get }
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var centerXWithinMargins: ConstraintDescriptionExtendable { get }
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var centerYWithinMargins: ConstraintDescriptionExtendable { get }
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#endif
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}
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/**
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Used to internally manage building constraint
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*/
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final internal class ConstraintDescription: ConstraintDescriptionExtendable, ConstraintDescriptionOffsetable, ConstraintDescriptionFinalizable {
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internal var left: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Left) }
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internal var top: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Top) }
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internal var right: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Right) }
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internal var bottom: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Bottom) }
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internal var leading: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Leading) }
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internal var trailing: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Trailing) }
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internal var width: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Width) }
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internal var height: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Height) }
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internal var centerX: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.CenterX) }
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internal var centerY: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.CenterY) }
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internal var baseline: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Baseline) }
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#if os(iOS)
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internal var firstBaseline: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.FirstBaseline) }
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internal var leftMargin: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.LeftMargin) }
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internal var rightMargin: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.RightMargin) }
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internal var topMargin: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.TopMargin) }
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internal var bottomMargin: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.BottomMargin) }
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internal var leadingMargin: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.LeadingMargin) }
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internal var trailingMargin: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.TrailingMargin) }
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internal var centerXWithinMargins: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.CenterXWithinMargins) }
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internal var centerYWithinMargins: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.CenterYWithinMargins) }
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#endif
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// MARK: initializer
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init(fromItem: ConstraintItem) {
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self.fromItem = fromItem
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self.toItem = ConstraintItem(object: nil, attributes: ConstraintAttributes.None)
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}
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// MARK: equalTo
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internal func equalTo(other: ConstraintItem) -> ConstraintDescriptionOffsetable {
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return self.constrainTo(other, relation: .Equal)
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}
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internal func equalTo(other: View) -> ConstraintDescriptionOffsetable {
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return self.constrainTo(other, relation: .Equal)
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}
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#if os(iOS)
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internal func equalTo(other: UILayoutSupport) -> ConstraintDescriptionOffsetable {
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return self.constrainTo(other, relation: .Equal)
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}
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#endif
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internal func equalTo(other: Float) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(other, relation: .Equal)
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}
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internal func equalTo(other: Double) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(Float(other), relation: .Equal)
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}
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internal func equalTo(other: CGFloat) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(Float(other), relation: .Equal)
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}
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internal func equalTo(other: Int) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(Float(other), relation: .Equal)
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}
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internal func equalTo(other: UInt) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(Float(other), relation: .Equal)
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}
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internal func equalTo(other: CGSize) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(other, relation: .Equal)
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}
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internal func equalTo(other: CGPoint) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(other, relation: .Equal)
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}
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internal func equalTo(other: EdgeInsets) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(other, relation: .Equal)
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}
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// MARK: lessThanOrEqualTo
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internal func lessThanOrEqualTo(other: ConstraintItem) -> ConstraintDescriptionOffsetable {
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return self.constrainTo(other, relation: .LessThanOrEqualTo)
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}
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internal func lessThanOrEqualTo(other: View) -> ConstraintDescriptionOffsetable {
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return self.constrainTo(other, relation: .LessThanOrEqualTo)
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}
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#if os(iOS)
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internal func lessThanOrEqualTo(other: UILayoutSupport) -> ConstraintDescriptionOffsetable {
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return self.constrainTo(other, relation: .LessThanOrEqualTo)
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}
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#endif
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internal func lessThanOrEqualTo(other: Float) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(other, relation: .LessThanOrEqualTo)
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}
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internal func lessThanOrEqualTo(other: Double) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(Float(other), relation: .LessThanOrEqualTo)
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}
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internal func lessThanOrEqualTo(other: CGFloat) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(Float(other), relation: .LessThanOrEqualTo)
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}
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internal func lessThanOrEqualTo(other: Int) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(Float(other), relation: .LessThanOrEqualTo)
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}
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internal func lessThanOrEqualTo(other: UInt) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(Float(other), relation: .LessThanOrEqualTo)
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}
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internal func lessThanOrEqualTo(other: CGSize) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(other, relation: .LessThanOrEqualTo)
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}
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internal func lessThanOrEqualTo(other: CGPoint) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(other, relation: .LessThanOrEqualTo)
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}
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internal func lessThanOrEqualTo(other: EdgeInsets) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(other, relation: .LessThanOrEqualTo)
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}
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// MARK: greaterThanOrEqualTo
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internal func greaterThanOrEqualTo(other: ConstraintItem) -> ConstraintDescriptionOffsetable {
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return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
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}
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internal func greaterThanOrEqualTo(other: View) -> ConstraintDescriptionOffsetable {
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return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
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}
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#if os(iOS)
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internal func greaterThanOrEqualTo(other: UILayoutSupport) -> ConstraintDescriptionOffsetable {
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return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
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}
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#endif
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internal func greaterThanOrEqualTo(other: Float) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
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}
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internal func greaterThanOrEqualTo(other: Double) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(Float(other), relation: .GreaterThanOrEqualTo)
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}
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internal func greaterThanOrEqualTo(other: CGFloat) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(Float(other), relation: .GreaterThanOrEqualTo)
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}
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internal func greaterThanOrEqualTo(other: Int) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(Float(other), relation: .GreaterThanOrEqualTo)
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}
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internal func greaterThanOrEqualTo(other: UInt) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(Float(other), relation: .GreaterThanOrEqualTo)
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}
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internal func greaterThanOrEqualTo(other: CGSize) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
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}
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internal func greaterThanOrEqualTo(other: CGPoint) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
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}
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internal func greaterThanOrEqualTo(other: EdgeInsets) -> ConstraintDescriptionMultipliable {
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return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
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}
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// MARK: multiplier
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internal func multipliedBy(amount: Float) -> ConstraintDescriptionPriortizable {
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self.multiplier = amount
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return self
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}
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internal func multipliedBy(amount: Double) -> ConstraintDescriptionPriortizable {
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return self.multipliedBy(Float(amount))
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}
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internal func multipliedBy(amount: CGFloat) -> ConstraintDescriptionPriortizable {
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return self.multipliedBy(Float(amount))
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}
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internal func multipliedBy(amount: Int) -> ConstraintDescriptionPriortizable {
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return self.multipliedBy(Float(amount))
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}
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internal func multipliedBy(amount: UInt) -> ConstraintDescriptionPriortizable {
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return self.multipliedBy(Float(amount))
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}
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internal func dividedBy(amount: Float) -> ConstraintDescriptionPriortizable {
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self.multiplier = 1.0 / amount;
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return self
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}
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internal func dividedBy(amount: Double) -> ConstraintDescriptionPriortizable {
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return self.dividedBy(Float(amount))
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}
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internal func dividedBy(amount: CGFloat) -> ConstraintDescriptionPriortizable {
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return self.dividedBy(Float(amount))
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}
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internal func dividedBy(amount: Int) -> ConstraintDescriptionPriortizable {
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return self.dividedBy(Float(amount))
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}
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internal func dividedBy(amount: UInt) -> ConstraintDescriptionPriortizable {
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return self.dividedBy(Float(amount))
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}
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// MARK: priority
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internal func priority(priority: Float) -> ConstraintDescriptionFinalizable {
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self.priority = priority
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return self
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}
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internal func priority(priority: Double) -> ConstraintDescriptionFinalizable {
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return self.priority(Float(priority))
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}
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internal func priority(priority: CGFloat) -> ConstraintDescriptionFinalizable {
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return self.priority(Float(priority))
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}
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func priority(priority: UInt) -> ConstraintDescriptionFinalizable {
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return self.priority(Float(priority))
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}
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internal func priority(priority: Int) -> ConstraintDescriptionFinalizable {
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return self.priority(Float(priority))
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}
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internal func priorityRequired() -> ConstraintDescriptionFinalizable {
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return self.priority(1000.0)
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}
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internal func priorityHigh() -> ConstraintDescriptionFinalizable {
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return self.priority(750.0)
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}
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internal func priorityMedium() -> ConstraintDescriptionFinalizable {
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#if os(iOS)
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return self.priority(500.0)
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#else
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return self.priority(501.0)
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#endif
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}
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internal func priorityLow() -> ConstraintDescriptionFinalizable {
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return self.priority(250.0)
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}
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// MARK: offset
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internal func offset(amount: Float) -> ConstraintDescriptionMultipliable {
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self.constant = amount
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return self
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}
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internal func offset(amount: Double) -> ConstraintDescriptionMultipliable {
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return self.offset(Float(amount))
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}
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internal func offset(amount: CGFloat) -> ConstraintDescriptionMultipliable {
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return self.offset(Float(amount))
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}
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internal func offset(amount: Int) -> ConstraintDescriptionMultipliable {
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return self.offset(Float(amount))
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}
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internal func offset(amount: UInt) -> ConstraintDescriptionMultipliable {
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return self.offset(Float(amount))
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}
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internal func offset(amount: CGPoint) -> ConstraintDescriptionMultipliable {
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self.constant = amount
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return self
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}
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internal func offset(amount: CGSize) -> ConstraintDescriptionMultipliable {
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self.constant = amount
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return self
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}
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internal func offset(amount: EdgeInsets) -> ConstraintDescriptionMultipliable {
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self.constant = amount
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return self
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}
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// MARK: insets
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internal func insets(amount: EdgeInsets) -> ConstraintDescriptionMultipliable {
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self.constant = EdgeInsets(top: amount.top, left: amount.left, bottom: -amount.bottom, right: -amount.right)
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return self
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}
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// MARK: Constraint
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internal var constraint: Constraint {
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if self.createdConstraint == nil {
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if self.relation == nil {
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fatalError("Attempting to create a constraint from a ConstraintDescription before it has been fully chained.")
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}
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self.createdConstraint = Constraint(
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fromItem: self.fromItem,
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toItem: self.toItem,
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relation: self.relation!,
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constant: self.constant,
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multiplier: self.multiplier,
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priority: self.priority)
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}
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return self.createdConstraint!
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}
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// MARK: Private
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private let fromItem: ConstraintItem
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private var toItem: ConstraintItem {
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willSet {
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if self.createdConstraint != nil {
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fatalError("Attempting to modify a ConstraintDescription after it’s constraint has been created.")
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}
|
||
}
|
||
}
|
||
private var relation: ConstraintRelation? {
|
||
willSet {
|
||
if self.createdConstraint != nil {
|
||
fatalError("Attempting to modify a ConstraintDescription after it’s constraint has been created.")
|
||
}
|
||
}
|
||
}
|
||
private var constant: Any = Float(0.0) {
|
||
willSet {
|
||
if self.createdConstraint != nil {
|
||
fatalError("Attempting to modify a ConstraintDescription after it’s constraint has been created.")
|
||
}
|
||
}
|
||
}
|
||
private var multiplier: Float = 1.0 {
|
||
willSet {
|
||
if self.createdConstraint != nil {
|
||
fatalError("Attempting to modify a ConstraintDescription after it’s constraint has been created.")
|
||
}
|
||
}
|
||
}
|
||
private var priority: Float = 1000.0 {
|
||
willSet {
|
||
if self.createdConstraint != nil {
|
||
fatalError("Attempting to modify a ConstraintDescription after it’s constraint has been created.")
|
||
}
|
||
}
|
||
}
|
||
private var createdConstraint: Constraint? = nil
|
||
|
||
private func addConstraint(attributes: ConstraintAttributes) -> ConstraintDescription {
|
||
if self.relation == nil {
|
||
self.fromItem.attributes += attributes
|
||
}
|
||
return self
|
||
}
|
||
|
||
private func constrainTo(other: ConstraintItem, relation: ConstraintRelation) -> ConstraintDescription {
|
||
if other.attributes != ConstraintAttributes.None {
|
||
let toLayoutAttributes = other.attributes.layoutAttributes
|
||
if toLayoutAttributes.count > 1 {
|
||
let fromLayoutAttributes = self.fromItem.attributes.layoutAttributes
|
||
if toLayoutAttributes != fromLayoutAttributes {
|
||
NSException(name: "Invalid Constraint", reason: "Cannot constrain to multiple non identical attributes", userInfo: nil).raise()
|
||
return self
|
||
}
|
||
other.attributes = ConstraintAttributes.None
|
||
}
|
||
}
|
||
self.toItem = other
|
||
self.relation = relation
|
||
return self
|
||
}
|
||
|
||
private func constrainTo(other: View, relation: ConstraintRelation) -> ConstraintDescription {
|
||
return constrainTo(ConstraintItem(object: other, attributes: ConstraintAttributes.None), relation: relation)
|
||
}
|
||
|
||
#if os(iOS)
|
||
|
||
private func constrainTo(other: UILayoutSupport, relation: ConstraintRelation) -> ConstraintDescription {
|
||
return constrainTo(ConstraintItem(object: other, attributes: ConstraintAttributes.None), relation: relation)
|
||
}
|
||
|
||
#endif
|
||
|
||
private func constrainTo(other: Float, relation: ConstraintRelation) -> ConstraintDescription {
|
||
self.constant = other
|
||
return constrainTo(ConstraintItem(object: nil, attributes: ConstraintAttributes.None), relation: relation)
|
||
}
|
||
|
||
private func constrainTo(other: Double, relation: ConstraintRelation) -> ConstraintDescription {
|
||
self.constant = other
|
||
return constrainTo(ConstraintItem(object: nil, attributes: ConstraintAttributes.None), relation: relation)
|
||
}
|
||
|
||
private func constrainTo(other: CGSize, relation: ConstraintRelation) -> ConstraintDescription {
|
||
self.constant = other
|
||
return constrainTo(ConstraintItem(object: nil, attributes: ConstraintAttributes.None), relation: relation)
|
||
}
|
||
|
||
private func constrainTo(other: CGPoint, relation: ConstraintRelation) -> ConstraintDescription {
|
||
self.constant = other
|
||
return constrainTo(ConstraintItem(object: nil, attributes: ConstraintAttributes.None), relation: relation)
|
||
}
|
||
|
||
private func constrainTo(other: EdgeInsets, relation: ConstraintRelation) -> ConstraintDescription {
|
||
self.constant = other
|
||
return constrainTo(ConstraintItem(object: nil, attributes: ConstraintAttributes.None), relation: relation)
|
||
}
|
||
} |