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<img src="http://snapkit.io/images/banner.jpg" alt="" />
SnapKit is a DSL to make Auto Layout easy on both iOS and OS X.
[](https://travis-ci.org/SnapKit/SnapKit)
[](https://github.com/SnapKit/SnapKit)
[](https://cocoapods.org/pods/SnapKit)
[](https://github.com/Carthage/Carthage)
#### ⚠️ **To use with Swift 3.x please ensure you are using >= 3.0.0** ⚠️
#### ⚠️ **To use with Swift 4.x please ensure you are using >= 4.0.0** ⚠️
## Contents
- [Requirements](#requirements)
- [Migration Guides](#migration-guides)
- [Communication](#communication)
- [Installation](#installation)
- [Usage](#usage)
- [Credits](#credits)
- [License](#license)
## Requirements
- iOS 8.0+ / Mac OS X 10.11+ / tvOS 9.0+
- Xcode 9.0+
- Swift 3.0+
## Communication
- If you **need help**, use [Stack Overflow](http://stackoverflow.com/questions/tagged/snapkit). (Tag 'snapkit')
- If you'd like to **ask a general question**, use [Stack Overflow](http://stackoverflow.com/questions/tagged/snapkit).
- 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](http://cocoapods.org) is a dependency manager for Cocoa projects. You can install it with the following command:
```bash
$ 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`:
```ruby
source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '10.0'
use_frameworks!
target '<Your Target Name>' do
pod 'SnapKit', '~> 4.0.0'
end
```
Then, run the following command:
```bash
$ pod install
```
### Carthage
[Carthage](https://github.com/Carthage/Carthage) is a decentralized dependency manager that builds your dependencies and provides you with binary frameworks.
You can install Carthage with [Homebrew](http://brew.sh/) using the following command:
```bash
$ brew update
$ brew install carthage
```
To integrate SnapKit into your Xcode project using Carthage, specify it in your `Cartfile`:
```ogdl
github "SnapKit/SnapKit" ~> 4.0.0
```
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.
---
## Usage
### Quick Start
```swift
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](http://snapkit.io/docs/)
- [F.A.Q.](http://snapkit.io/faq/)
## Credits
- Robert Payne ([@robertjpayne](https://twitter.com/robertjpayne))
- Many other contributors
## License
SnapKit is released under the MIT license. See LICENSE for details.
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