ios - UIView 动画无法调整 View 大小

Question

我正在使用以下代码来对 selectionMoreOptionView 的外观进行动画处理

[selectionMoreOptionView setFrame:CGRectMake(974, 56, 50, 0)];
[self.view insertSubview:selectionMoreOptionView aboveSubview:lightBoxView];
[lightBoxView setAlpha:0.0];

[UIView animateWithDuration:5.0
                      delay:0.0
                    options:UIViewAnimationOptionCurveLinear
                 animations:^{

                     [lightBoxView setAlpha:0.5];
                     [selectionMoreOptionView setFrame:CGRectMake(974, 56, 50, 100)];

                 } completion:^(BOOL finished) {
                 }];

但它不是动画，而是立即出现而没有动画。我做错了什么？

Answer 1

试试这个

[UIView animateWithDuration:.5 animations:^(void){

   [lightBoxView setAlpha:0.5];
   [selectionMoreOptionView setFrame:CGRectMake(974, 56, 50, 100)];

}];