Ios 确定展开序列动画何时完成

我有一个自定义动画，它使用

uipercentdriventeractivetransition

和

UIViewControllerAnimatedTransitioning

。它由展开序列启动，并在

prepareforsgue:

中设置转换委托

在我的演示视图控制器中，只要我开始segue，就会不断调用unwind IBAction，而不是segue完成时。这是有问题的，因为我的动画是手势驱动的，所以我们不知道需要多长时间才能完成

有没有办法知道segue什么时候完成了动画

---

无论是

视图都不会出现：

还是

视图都不会出现：

似乎在完成时被调用，我假设这是因为该段是一个展开段。

完成后捕捉动画您可以使用此功能

- (void)perform {
      [CATransaction begin];
        [[self sourceViewController] presentViewController:[self destinationViewController] animated:YES completion:nil];
      [CATransaction setCompletionBlock:^{
            //whatever you want to do after the animation
      }];
      [CATransaction commit];
    }

---

捕捉动画完成后，可以使用此选项

- (void)perform {
      [CATransaction begin];
        [[self sourceViewController] presentViewController:[self destinationViewController] animated:YES completion:nil];
      [CATransaction setCompletionBlock:^{
            //whatever you want to do after the animation
      }];
      [CATransaction commit];
    }

---

这在UIStoryboardSegue.h中进行了解释：

/// Subclasses can override this method to augment or replace the effect of this segue. For example, to animate alongside the effect of a Modal Presentation segue, an override of this method can call super, then send -animateAlongsideTransition:completion: to the transitionCoordinator of the destinationViewController.
/// The segue runtime will call +[UIView setAnimationsAreEnabled:] prior to invoking this method, based on the value of the Animates checkbox in the Properties Inspector for the segue.
- (void)perform;

e、 g

-（无效）执行{
[self.destinationViewController.transitionCoordinator AnimateLongSideTransition:^（id_非空上下文）{
}完成：^（id_非空上下文）{
//展开分段动画已完成
}];
[超级表演]；
}

这在UIStoryboardSegue.h中有解释：

/// Subclasses can override this method to augment or replace the effect of this segue. For example, to animate alongside the effect of a Modal Presentation segue, an override of this method can call super, then send -animateAlongsideTransition:completion: to the transitionCoordinator of the destinationViewController.
/// The segue runtime will call +[UIView setAnimationsAreEnabled:] prior to invoking this method, based on the value of the Animates checkbox in the Properties Inspector for the segue.
- (void)perform;

e、 g

-（无效）执行{
[self.destinationViewController.transitionCoordinator AnimateLongSideTransition:^（id_非空上下文）{
}完成：^（id_非空上下文）{
//展开分段动画已完成
}];
[超级表演]；
}