嵌套的UIVIew animateWithDuration不尊重完成

Question

我想做一些图形元素消失,移动背景图像,然后会出现新的图像元素.问题是当背景移动时,在背景移动动画完成之前出现新的背景.我没有在相关问题中看到一个好的答案,所以我会感激任何帮助.伪代码:

-(void)method1 {
[UIView animateWithDuration:0.6
                      delay:0.0 options:UIViewAnimationOptionCurveEaseIn
                 animations:^{
                     self.setThisOne.hidden = YES;
                     self.setThisAnother.hidden = YES;
                 }completion:^(BOOL finished) {
                     [UIView animateWithDuration:0.6
                                           delay:0.3
                                         options: UIViewAnimationOptionCurveEaseIn
                                      animations:^{ self.background.frame = myFrame; //Move background image
                                      } completion:^(BOOL finished){
                                          if (finished) {
                                              [self method2];
                                          }
                                      }
                      ];
                 }];

}

-(void)method2 {
    [UIView animateWithDuration:0.2
                      delay:0.3
                    options: UIViewAnimationOptionBeginFromCurrentState
                 animations:^{
                     self.aButtonsAppear.hidden = NO;
                     self.moreElementsApeear.hidden = NO
                 } completion:nil];

}

Answer 1

.hidden可能不是有生命力的,但.alpha是.在动画中使用.alpha来控制可见性.