iOS Masonry布局获取Frame

方法1

[self.scrollView mas_makeConstraints:^(MASConstraintMaker *make) {
make.edges.mas_equalTo(UIEdgeInsetsMake(0, 0, 0, 0));
}];
// 先调用superView的layoutIfNeeded方法再获取frame
[self.view layoutIfNeeded];
NSLog(@"%@", self.scrollView);

<UIScrollView: 0x7fc72d016000; frame = (0 0; 375 667);

方法2

[self.scrollView mas_makeConstraints:^(MASConstraintMaker *make) {
make.edges.mas_equalTo(UIEdgeInsetsMake(0, 0, 0, 0));
}];
// 0.1秒后获取frame， 设置为0秒也可以获取，具体参考链接
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
NSLog(@"%@", self.scrollView);
});

<UIScrollView: 0x7fc72d016000; frame = (0 0; 375 667);