iphone - 开始/结束外观转换的不平衡呼叫

Question

当我初始化UITabBarController每个选项卡包含的位置时，每个选项卡UINavigationController都UINavigationController包含UIViewController 在UIViewController我做类似的事情时

TSActivityDetailsVC * c = [[TSActivityDetailsVC alloc] initWithNibName:@"TSActivityDetailsVC" bundle:nil];
[self.navigationController pushViewController:c animated:YES];

我有动画，但是当我按下后退按钮时 - 我没有动画并出现错误

日志：

push view controller
Unbalanced calls to begin/end appearance transitions for <TSActivityMapVC: 0x81b1000>.
back btn pressed
Unbalanced calls to begin/end appearance transitions for <TSActivityDetailsVC: 0x81c85d0>.

初始化代码：

-(UITabBarController *) createMainTabBarController{
UITabBarController * tabbarCntr = [[UITabBarController alloc] init];
[tabbarCntr setViewControllers:[NSArray arrayWithObjects:
                                [[UINavigationController alloc] initWithRootViewController:[[TSActivityMapVC alloc] init]],                                    
                                [[UIViewController alloc] init],
                                [[UIViewController alloc] init],
                                [[UIViewController alloc] init],
                                [[UIViewController alloc] init]
                                , nil]];
[tabbarCntr.tabBar setSelectionIndicatorImage:[UIImage imageNamed:@"selection_indicator"]];
[tabbarCntr.tabBar setBackgroundImage:[UIImage imageNamed:@"tabbar_background"]];    

return tabbarCntr; 
}

在TSActivityMapVC我执行

TSActivityDetailsVC * c = [[TSActivityDetailsVC alloc] initWithNibName:@"TSActivityDetailsVC" bundle:nil]; 
[self.navigationController pushViewController:c animated:YES];

令人惊讶的是，当我转到另一个选项卡并返回 - 之后 - 一切正常，没有错误

Answer 1

我得到了解决方案！我继承了并忘记UITabBarController调用. 所以没有完成的过渡动画。viewWillAppearUITabBarController

这导致了“开始/结束外观的不平衡呼叫”！

Answer 2

最后我重现了你的错误。似乎您忘记在这两种方法中调用 super 。

-(void)beginAppearanceTransition:(BOOL)isAppearing animated:(BOOL)animated{
    [super beginAppearanceTransition:isAppearing animated:animated];
    NSLog(@"**************begin app tr");
}

-(void)endAppearanceTransition{
    [super endAppearanceTransition];
    NSLog(@"**************end app tr");
}

希望你的问题在这。