mirror of https://github.com/SnapKit/SnapKit
48 lines
2.0 KiB
Swift
48 lines
2.0 KiB
Swift
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// LayoutConstraint.swift
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// Snappy
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//
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// Copyright (c) 2011-2014 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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import UIKit
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/**
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* LayoutConstraint is a subclass of NSLayoutConstraint to assist Snappy and also provide better debugging
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*/
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class LayoutConstraint: NSLayoutConstraint {
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// internal
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internal var constraint: Constraint?
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internal class func layoutConstraintsInstalledOnView(view: View) -> Array<LayoutConstraint> {
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var constraints = objc_getAssociatedObject(view, &layoutConstraintsInstalledOnViewKey) as? Array<LayoutConstraint>
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if constraints {
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return constraints!
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}
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return []
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}
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internal class func setLayoutConstraints(layoutConstraints: Array<LayoutConstraint>, installedOnView view: View) {
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objc_setAssociatedObject(view, &layoutConstraintsInstalledOnViewKey, layoutConstraints, UInt(OBJC_ASSOCIATION_RETAIN_NONATOMIC))
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}
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}
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private var layoutConstraintsInstalledOnViewKey = ""
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