在自定义UITabBarController中点击视图跳转的时候,有可能就出现这个问题, 解决方法就是在自定义的UITabBarController中的视图显示消失通知方法中添加如下方法:
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillDisappear:animated];
[self.selectedViewController beginAppearanceTransition: YES animated:animated];
}
-(void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
[self.selectedViewController endAppearanceTransition];
}
-(void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[self.selectedViewController beginAppearanceTransition:NO animated:animated];
}
-(void)viewDidDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[self.selectedViewController endAppearanceTransition];
}
文档解释:
// If a custom container controller manually forwards its appearance callbacks, then rather than calling
// viewWillAppear:, viewDidAppear: viewWillDisappear:, or viewDidDisappear: on the children these methods
// should be used instead. This will ensure that descendent child controllers appearance methods will be
// invoked. It also enables more complex custom transitions to be implemented since the appearance callbacks are
// now tied to the final matching invocation of endAppearanceTransition.
- (void)beginAppearanceTransition:(BOOL)isAppearing animated:(BOOL)animated __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_5_0);
- (void)endAppearanceTransition __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_5_0);
Unbalanced calls to begin/end appearance transitions for **
原文：http://www.cnblogs.com/iqidan/p/UITabBarController_AppearanceTransitions.html