iphone - iPhone how to get the title for a custom Back-Button

Question

Heyho, I'm building a custom green back button which is being created in the "viewDidAppear:" method.

I don't have any problems with the "getting-it-into-the-Navigationbar" or with "popping-the-current-View", but my Problem is:

How do I get the title of the previous controller, so I can set it as Lable for the custom Back Button? And is there a way to know if there even is any?

Answer 1

后退按钮的标题始终是第二个顶视图控制器的标题。

因此您可以使用（在确保有≥2个视图控制器之后）：

NSArray* viewCtrlers = self.navigationController.viewControllers;
UIViewController* prevCtrler = [viewCtrlers objectAtIndex:[viewCtrlers count]-2];
return prevCtrler.title;

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如果您想要一个绿色按钮，为什么不简单地将导航栏的色调设置为绿色呢？

Answer 2

This is handled for you automatically. Just set the title of each view, and the UINavigationController takes care of the back button labels for you