对< TSActivityMapVC：0x81b1000>的开始/结束外观转换的不平衡调用。 [英] Unbalanced calls to begin/end appearance transitions for <TSActivityMapVC: 0x81b1000>

问题描述

当我初始化 UITabBarController 其中每个标签包含 UINavigationController 和每个 UINavigationController include UIViewController
在 UIViewController 我做的事情

When I init UITabBarController where each tab include UINavigationController and each UINavigationController include UIViewController when in UIViewController I do something like

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 - 我没有动画并且得到错误

I have animation, but when I press back button - I not have animation and get error

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; 
}

TSActivityMapVC I perfom

in TSActivityMapVC I perfom

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

令人惊讶的是，当我转到另一个标签并返回 - 之后 - 一切正常而且没有错误

surprisingly that when I go to another tab and return - after it - all works fine without errors

推荐答案

我得到了解决方案！我将 UITabBarController 子类化，忘了调用的超级 viewWillAppear 。因此 UITabBarController 的过渡动画未完成。

I got the solution! I subclasses the UITabBarController and forgot to call the super of viewWillAppear. So the transition animation of the UITabBarController not finished.

这导致不平衡调用开始/结束外观！

This caused the the "Unbalanced calls to begin/end appearance"!

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