UINavigationBar后退按钮消失 [英] UINavigationBar back button disappears

问题描述

我已经浪费了很多时间来处理这个奇怪的错误/错误.

I have lost a lot of time with this weird error/bug.

我有2个带有NavigationController的ViewController，我从第一个移到了pushViewController的第二个.但是，当我按下第二个viewController时，它会显示出来，并且导航栏上的backButton也将显示出来.但是此按钮会在很短的时间内消失(大约半秒钟).第一个viewC的标题还可以，并且在后退按钮上也可以显示(我可以在显示它的时候抓到它).

I have 2 ViewControllers with navigationController and I move from the first to the second with pushViewController. But when I push second viewController, it shows up and also backButton on the navigation bar shows up. But this button disappear in a very short time (about half a second). Title of the first viewC is ok and it`s also on the back button (I can catch it in the time it is shown up).

有人提示哪里可能是问题吗?我在这个时候迷路了...

Does anyone have a tip where could be the problem? I am lost in this time...

谢谢

推荐答案

确定.我是个白痴.忘记了我清除了viewDidDisappear中包含标题的内容.因此，对于后代的结论是……当backBarButton遇到问题时-前一个viewController的标题存在99％的错误，或者将该按钮隐藏在某个地方" ...

OK. I'm an idiot. A forgot that I clear content including title in my viewDidDisappear. So the conclusion for the future generations... "when you have problems with backBarButton - it's 99% error with the previous viewController's title or you are hiding that button somewhere"...

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