Masonry的官方是这么描述自己的。
mas_makeConstraints mas_updateContraints mas_remakeContraints
[redView mas_makeConstraints:^(MASConstraintMaker *make) {
make.centerX.equalTo(self.view.mas_centerX);
make.centerY.equalTo(self.view.mas_centerY);
//equalTo 后面要求跟一个OC对象的数据,所以需要对数字进行包装。@将数字变成了NSNumber 类型。
make.width.equalTo(@200);
make.height.equalTo(@50);
}];
make.xxxx属性.equalTo(参照对象.mas_属性【如果相同,可以省略】).offset(常数)
// 进阶语法
[redView mas_makeConstraints:^(MASConstraintMaker *make) {
make.center.equalTo(self.view);
make.size.equalTo([NSValue valueWithCGSize:CGSizeMake(200, 100)]);
}];
[redView mas_makeConstraints:^(MASConstraintMaker *make) {
make.center.equalTo(self.view);
make.size.mas_equalTo(CGSizeMake(100, 200));
}];
// create a imageview in the center of scrollview UIImageView *imageView = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"001"]]; [scrollView addSubview:imageView]; [imageView mas_makeConstraints:^(MASConstraintMaker *make) { make.center.equalTo(scrollView); make.size.mas_equalTo(CGSizeMake(140, 140)); }];
[redView mas_makeConstraints:^(MASConstraintMaker *make) { make.top.equalTo(self.view.mas_top).offset(20); make.left.equalTo(self.view.mas_left).offset(20); make.bottom.equalTo(self.view.mas_bottom).offset(-20); make.right.equalTo(self.view.mas_right).offset(-20); }];
[redView mas_makeConstraints:^(MASConstraintMaker *make) {
make.top.equalTo(self.view).offset(20);
make.left.equalTo(self.view).offset(20);
make.bottom.equalTo(self.view).offset(-20);
make.right.equalTo(self.view.).offset(-20);
}];
[imageView mas_makeConstraints:^(MASConstraintMaker *make) { make.top.offset(20); make.left.offset(20); make.bottom.offset(20); make.right.offset(20); }];
[imageView mas_makeConstraints:^(MASConstraintMaker *make) {
make.top.left.offset(20);
make.bottom.right.offset(20);
}];
[imageView mas_makeConstraints:^(MASConstraintMaker *make) {
make.edges.mas_offset(UIEdgeInsetsMake(20, 20, 20, 20));
}];
[imageView mas_updateConstraints:^(MASConstraintMaker *make) {
make.right.offset(-50);
}];
// 播放两秒动画
[UIView animateWithDuration:2 animations:^{
//让这个控件立刻根据约束修改自己的frame
[imageView layoutIfNeeded];
}];
#define MAS_SHORTHAND
#define MAS_SHORTHAND_GLOBALS