Masonry使用指南

引入头文件

#import <Masonry.h>

 

利用例子

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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