为UINavigationController的“后退”按钮设置动画

我做了一些类似于您所描述的事情,即在UINavigationController中更改pop和push-of-view的默认动画。

其思想是禁用对象的默认动画,并将其替换为您自己的动画。我为UINavigationController创建了一个新的类别,并使用了一个类似于下面的函数。

 - (void) altAnimatePopViewControllerAnimated:(BOOL)animated
 {
[CATransaction begin];

CATransition *transition;
transition = [CATransition animation];
transition.type = kCATransitionPush;          // Use any animation type and subtype you like
transition.subtype = kCATransitionFromTop;
transition.duration = 0.3;

CATransition *fadeTrans = [CATransition animation];
fadeTrans.type = kCATransitionFade;
fadeTrans.duration = 0.3;


[CATransaction setValue:(id)kCFBooleanTrue
                 forKey:kCATransactionDisableActions];

[[[[self.view subviews] objectAtIndex:0] layer] addAnimation:transition forKey:nil];
[[[[self.view subviews] objectAtIndex:1] layer] addAnimation:fadeTrans forKey:nil];



[self  popViewControllerAnimated:YES];
[CATransaction commit];
   }

   [self.navigationController altAnimatePopViewControllerAnimated:YES];

虽然不完美,但很管用。当您选择不同的动画类型时,请使用组成导航栏/控制器的不同子视图来实现完美的效果。

我花了不少时间才想出这个,所以明智地使用它:)

*******编辑

尝试用以下内容替换推送转换(我自己没有尝试):

  CAKeyframeAnimation *scale = [CAKeyframeAnimation animationWithKeyPath:@"transform.scale"];
  scale.duration = duration;
  scale.values = [NSArray arrayWithObjects:[NSNumber numberWithFloat:.5f],
              [NSNumber numberWithFloat:1.2f],
              [NSNumber numberWithFloat:.85f],
              [NSNumber numberWithFloat:1.f],
              nil];