从xib加载子视图，重新加载视图框架，但视图子视图不会改变框架

Question

- (void)viewDidLoad {

    self.buttonSubView=(EventbuttonsView *)[[NSBundle mainBundle] loadNibNamed:@"ActionHeadView" owner:nil options:nil][1];

    [self.view addSubview:self.buttonSubView];

    [self.taskStatusRobView mas_makeConstraints:^(MASConstraintMaker *make) {

        make.left.equalTo(self.view);
        make.right.equalTo(self.view);
        make.bottom.equalTo(self.view.mas_bottom).offset(-60);
        make.width.equalTo(self.view.mas_width);
        make.height.equalTo(@60);
    }];

    [self.buttonSubView layoutIfNeeded];

}

buttonSubView is a customview, It's subviews use autolayout , when i call [self.buttonSubView layoutIfNeeded] ,but subviews donot update frame? why? in xib i use update frame, it is ok.but run in iPhone,cannot work?

Answer 1

You should call the layoutIfNeeded method on self.view instead of self.buttonSubView. Hope this help.