SnapKit is a DSL to make Auto Layout easy on both iOS and OS X.

• Requirements
• Migration Guides
• Communication
• Installation
• Usage
• Credits
• License

Requirements

• iOS 9.0+ / Mac OS X 10.11+ / tvOS 9.0+
• Xcode 8.0+
• Swift 3.0+

Migration Guides

• SnapKit 3.0 Migration Guide

Communication

• If you need help, use Stack Overflow. (Tag 'snapkit')
• If you'd like to ask a general question, use Stack Overflow.
• If you found a bug, open an issue.
• If you have a feature request, open an issue.
• If you want to contribute, submit a pull request.

Installation

CocoaPods

CocoaPods is a dependency manager for Cocoa projects. You can install it with the following command:

$ gem install cocoapods

CocoaPods 1.1.0+ is required to build SnapKit 4.0.0+.

To integrate SnapKit into your Xcode project using CocoaPods, specify it in your Podfile:

source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '10.0'
use_frameworks!

target '<Your Target Name>' do
    pod 'SnapKit', '~> 3.0'
end

Then, run the following command:

$ pod install

Carthage

Carthage is a decentralized dependency manager that builds your dependencies and provides you with binary frameworks.

You can install Carthage with Homebrew using the following command:

$ brew update
$ brew install carthage

To integrate SnapKit into your Xcode project using Carthage, specify it in your Cartfile:

github "SnapKit/SnapKit" ~> 3.0

Run carthage update to build the framework and drag the built SnapKit.framework into your Xcode project.

Manually

If you prefer not to use either of the aforementioned dependency managers, you can integrate SnapKit into your project manually.

Embedded Framework

• Open up Terminal, cd into your top-level project directory, and run the following command "if" your project is not initialized as a git repository:

$ git init

• Add SnapKit as a git submodule by running the following command:

$ git submodule add https://github.com/SnapKit/SnapKit.git

• Open the new SnapKit folder, and drag the SnapKit.xcodeproj into the Project Navigator of your application's Xcode project.

  It should appear nested underneath your application's blue project icon. Whether it is above or below all the other Xcode groups does not matter.

• Select the SnapKit.xcodeproj in the Project Navigator and verify the deployment target matches that of your application target.

• Next, select your application project in the Project Navigator (blue project icon) to navigate to the target configuration window and select the application target under the "Targets" heading in the sidebar.

• In the tab bar at the top of that window, open the "General" panel.

• Click on the + button under the "Embedded Binaries" section.

• You will see two different SnapKit.xcodeproj folders each with two different versions of the SnapKit.framework nested inside a Products folder.

  It does not matter which Products folder you choose from, but it does matter whether you choose the top or bottom SnapKit.framework.

• Select the top SnapKit.framework for iOS and the bottom one for OS X.

  You can verify which one you selected by inspecting the build log for your project. The build target for SnapKit will be listed as SnapKit.

• And that's it!

The SnapKit.framework is automagically added as a target dependency, linked framework and embedded framework in a copy files build phase which is all you need to build on the simulator and a device.

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Usage

Quick Start

import SnapKit

class MyViewController: UIViewController {

    lazy var box = UIView()

    override func viewDidLoad() {
        super.viewDidLoad()

        self.view.addSubview(box)
        box.snp.makeConstraints { (make) -> Void in
           make.width.height.equalTo(50)
           make.center.equalTo(self.view)
        }
    }

}

Resources

• Documentation
• F.A.Q.

Credits

• Robert Payne (@robertjpayne)
• Many other contributors

License

SnapKit is released under the MIT license. See LICENSE for details.