Masonry使用指南

引入头文件

#import <Masonry.h>

 

利用例子

UIView *blueView = [[UIView alloc] init];
    UIView *redView = [[UIView alloc] init];
    [self addSubview: redView];
    [self addSubview: blueView];
    
    [blueView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.width.mas_equalTo(150);
        make.height.mas_equalTo(50);
        make.top.equalTo(self).offset(100);
        make.left.equalTo(self).offset(30);
    }];
    [redView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.height.mas_equalTo(30);
        make.centerY.equalTo(blueView.mas_centerY);
        make.left.equalTo(blueView.mas_right).offset(20);
        make.right.equalTo(self.mas_right).offset(-30);
    }];
    
    redView.backgroundColor = UIColor.redColor;
    blueView.backgroundColor = UIColor.blueColor;

 

注意要先把redView和blueView添加到父视图中，再用Masonry进行操作

不然会报错：

2020-11-10 21:43:57.269861+0800 only-UI-travel-APP[7141:67655] *** Assertion failure in -[MASViewConstraint install], /Users/student14/Documents/only-UI-travel-APP/Pods/Masonry/Masonry/MASViewConstraint.m:343