问题覆盖了iOS中的“后退”按钮 [英] Problem over-riding the Back button in iOS

问题描述

我有一个UITableViewController A，它将UITableViewController B推入堆栈。

I have a UITableViewController A that is pushing UITableViewController B onto the stack.

在A中，我有以下代码：

In A i have the code:

self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Trending" 
                                                                                     style:UIBarButtonItemStylePlain 
                                                                                    target:self 
                                                                                    action:@selector(backButtonClicked:)];

backButtonClicked：也已实现。

backButtonClicked: is also implemented.

B的标题为趋势，但是当我单击它时，它永远不会到达backButtonClicked：

B has the title Trending, but when I click it, it doesn't ever reach backButtonClicked:

这是为什么？

推荐答案

尝试设置委托：

[navigationController setDelegate:self];

或者使用向左按钮。有时后退按钮不适用于某些视图，而我不得不使用左按钮：

Or using the left button. Sometimes the back button doesn't work with certain views and I have had to use the left button instead:

self.navigationItem.leftBarButtonItem =  [[UIBarButtonItem alloc] initWithTitle:@"Trending" style:UIBarButtonItemStylePlain target:self action:@selector(backButtonClicked:)];

另外，您可以尝试设置B的按钮项，而不是A：

Also, you can try setting B's button item instead of A:

viewControllerB.navigationItem.backBarButtonItem =  [[UIBarButtonItem alloc] initWithTitle:@"Trending" style:UIBarButtonItemStylePlain target:self action:@selector(backButtonClicked:)];

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