PureLayout 是 iOS & OS X Auto Layout 的终极 API——非常简单,又非常强大。PureLayout 通过一个全面的Auto Layout API 扩展了 UIView/NSView, NSArray 和 NSLayoutConstraint,仿照苹果自身的框架, 构建了一个全面的自动布局 API, 这样你再也不用为适配而苦恼啦!!!
添加PureLayout到你的工程里面
- 用CocoaPods安装(
podilfe中加pod 'PureLayout'
)/GitHub下载PureLayout, 手动添加到你的项目中
- 导入头文件
#import <PureLayout/PureLayout.h>
/ #import "PureLayout.h"
我们就这个布局来简单说一下
首先新建几个 View
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@property (nonatomic, strong) UIView *blueView; @property (nonatomic, strong) UIView *redView; @property (nonatomic, strong) UIView *yellowView; @property (nonatomic, strong) UIView *greenView; @property (nonatomic, assign) BOOL didSetupConstraints;
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然后在加载试图
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- (void)loadView { self.view = [UIView new]; self.view.backgroundColor = [UIColor colorWithWhite:0.1 alpha:1.0]; [self.view addSubview:self.blueView]; [self.view addSubview:self.redView]; [self.view addSubview:self.yellowView]; [self.view addSubview:self.greenView]; [self.view setNeedsUpdateConstraints];
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如果没有试图,那么就重新创建一个
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- (UIView *)blueView { if (!_blueView) { _blueView = [UIView newAutoLayoutView]; _blueView.backgroundColor = [UIColor blueColor]; } return _blueView; }
- (UIView *)redView { if (!_redView) { _redView = [UIView newAutoLayoutView]; _redView.backgroundColor = [UIColor redColor]; } return _redView; }
- (UIView *)yellowView { if (!_yellowView) { _yellowView = [UIView newAutoLayoutView]; _yellowView.backgroundColor = [UIColor yellowColor]; } return _yellowView; }
- (UIView *)greenView { if (!_greenView) { _greenView = [UIView newAutoLayoutView]; _greenView.backgroundColor = [UIColor greenColor]; } return _greenView; }
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然后再添加试图的约束条件
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- (void)updateViewConstraints
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github 地址:https://github.com/smileyborg/PureLayout#