UINavigationController后退按钮不可见，但有效 [英] UINavigationController Back Button not visible, but works

问题描述

我有一个场景，我的UINavigationController缺少后退按钮（左键）但点击左键似乎仍然有效。

I have a scenario where my UINavigationController is missing the back button (left button) but tapping the left button still seems to work.

我发现了类似的问题在这里： UINavigationController的后退按钮消失了吗？
通过不设置标题解决了@，但这不是我的问题。是否有任何其他情况会导致此行为？

I found a similar problem posted here: UINavigationController's back button disappears? which was resolved by not setting the title to @"", but that's not my problem. Are there any other scenarios that would cause this behaviour?

更新：

如果重要的是这里是我的视图层次结构：我的MainWindow包含一个UINavigationView，它首先加载一个UIViewController（该视图包含一个Map）。当点击注释附件按钮时，它会加载UITableViewController。这个视图应该有后退按钮。

In case it matters here is my view hierarchy: My MainWindow contains a UINavigationView which first loads a UIViewController (this view contains a Map). When tapping on an annotation accessory button it then loads a UITableViewController. It's this view that should have the back button.

谢谢。

推荐答案

<哦，伙计！好的，我在这里找到答案：
http://www.iphonedevsdk.com/forum/iphone-sdk-development/35633-back-button-missing-navigation-bar.html

事实证明我的第一个视图（带有地图的视图）没有标题集（实际上我隐藏了导航栏，因为我不想显示它）。即使标题WAS在稍后的视图中设置，SDK似乎也不在乎。我仍然不明白100％为什么我可以点击该区域以使其工作。

It turns out that my first view (the one with the map on it) didn't have a title set (in fact I hide the navigation bar because I didn't want to show it). Even if the title WAS set on a later view the SDK doesn't seem to care. I still don't understand 100% why I could tap in the area to get it to work.

所以，即使我隐藏了第一个导航栏，我仍然需要设置它的标题。

So even though I hide the first navigation bar I still need to set the title of it.

这样做了！

感谢所有试图提供帮助的人。

Thanks to everyone who tried to help.

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