等价于
UIView *tempView=[[UIView alloc]init];
tempView.backgroundColor=[UIColor greenColor];
[self.view addSubview:tempView];
[tempView mas_makeConstraints:^(MASConstraintMaker *make) {
make.left.equalTo(self.view.mas_left).offset(50);
make.right.equalTo(self.view.mas_right).offset(-50);
make.top.equalTo(self.view.mas_top).offset(50);
make.bottom.equalTo(self.view.mas_bottom).offset(-50);
}];
也可以简化为下面这种
UIView *tempView=[[UIView alloc]init];
tempView.backgroundColor=[UIColor greenColor];
[self.view addSubview:tempView];
[tempView mas_makeConstraints:^(MASConstraintMaker *make) {
make.edges.mas_equalTo(UIEdgeInsetsMake(50, 50, 50, 50));
}];
又等价于
UIView *tempView=[[UIView alloc]init];
tempView.backgroundColor=[UIColor greenColor];
[self.view addSubview:tempView];
[tempView mas_makeConstraints:^(MASConstraintMaker *make) {
make.edges.equalTo(self.view).insets(UIEdgeInsetsMake(50, 50, 50, 50));
}];
更新约束
[tempView mas_updateConstraints:^(MASConstraintMaker *make) {
make.left.mas_equalTo(50);
make.right.mas_equalTo(-50);
make.top.mas_equalTo(100);
make.bottom.mas_equalTo(-100);
}];
清除之前的约束保留最新的
[tempView mas_remakeConstraints:^(MASConstraintMaker *make) {
make.left.mas_equalTo(100);
make.right.mas_equalTo(-100);
make.top.mas_equalTo(100);
make.bottom.mas_equalTo(-100);
}];
特别注意：
声明约束必须在视图添加到父试图上面之后调用。
4.）mas_equalTo与equalTo
上面的举例中分别使用了mas_equalTo和equalTo达到了同样的效果，我在刚开始使用Masonry的时候很容易混淆他们两个，今天特意分析一下他们的区别。mas_equalTo是一个MACRO,比较的是值，equalTo比较的是id类型。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持ASPKU。
注：相关教程知识阅读请移步到IOS开发频道。
