10.1 Masonry简单介绍

#import "ViewController.h"
#import "Masonry.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
   
    UIView *blueView = [[UIView alloc]init];
    blueView.backgroundColor = UIColor.blueColor;
    [self.view addSubview:blueView];
    
    UIView *greenView = [[UIView alloc]init];
    greenView.backgroundColor = UIColor.greenColor;
    [self.view addSubview:greenView];
    
    //mas_makeConstraints 添加约束
    [blueView mas_makeConstraints:^(MASConstraintMaker *make) {
        //trailing 右侧  equalTo相对于哪个视图 offset 约束值
        make.trailing.equalTo(self.view).offset(-50);
        //equalTo() 参数必须是对象 如果约束相对于父视图的话 可以使用下面的写法
        make.bottom.equalTo(@(-50));
        
        make.width.equalTo(@100);
        //mas_equalTo（）参数可以使基础类型
        make.height.mas_equalTo(60);
    }];
    
    [greenView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.trailing.mas_equalTo(blueView.mas_leading).offset(-60);
        make.bottom.mas_equalTo(blueView.mas_top).offset(-60);
        make.width.mas_equalTo(blueView);
        make.height.mas_equalTo(60);
    }];
    
    //删除旧约束 跟新新约束
//    [greenView mas_remakeConstraints:^(MASConstraintMaker *make) {
//        
//    }];
    
    //更新约束
//    [greenView mas_updateConstraints:^(MASConstraintMaker *make) {
//        
//    }];
    
}
@end

Masonry简单介绍.png