【原】iOS学习之Masonry第三方约束

1、Masonry概述

• 目前最流行的Autolayout第三方框架

　　用优雅的代码方式编写Autolayout

　　省去了苹果官方恶心的Autolayout代码

　　大大提高了开发效率

•  框架地址：https://github.com/SnapKit/Masonry

2、常用方法

• 这个方法只会添加新的约束

[blueView mas_makeConstraints:^(MASConstraintMaker *make) {}];

　　如果添加了下面的宏，mas_width也可以写成width

　　#define MAS_SHORTHAND

//define this constant if you want to use Masonry without the 'mas_' prefix#define MAS_SHORTHAND//define this constant if you want to enable auto-boxing for default syntax#define MAS_SHORTHAND_GLOBALS#import "Masonry.h" - (void)viewDidLoad {  [super viewDidLoad];    // 蓝色控件  UIView *blueView = [[UIView alloc] init];  blueView.backgroundColor = [UIColor blueColor];  [self.view addSubview:blueView];    // 红色控件  UIView *redView = [[UIView alloc] init];  redView.backgroundColor = [UIColor redColor];  [self.view addSubview:redView];    // 添加约束  CGFloat margin = 20;  CGFloat height = 50;  [blueView makeConstraints:^(MASConstraintMaker *make) {    make.left.equalTo(self.view.left).offset(margin);    make.right.equalTo(redView.left).offset(-margin);    make.bottom.equalTo(self.view.bottom).offset(-margin);    make.height.equalTo(height);    make.top.equalTo(redView.top);    make.bottom.equalTo(redView.bottom);    make.width.equalTo(redView.width);  }];    [redView makeConstraints:^(MASConstraintMaker *make) {    make.right.equalTo(self.view.right).offset(-margin);  }];} 

5、可有可无的用法

　　以下方法都仅仅是为了提高可读性，可有可无

• with

- (MASConstraint*)with {  return self;}   

原标题：【原】iOS学习之Masonry第三方约束

关键词：IOS