backBarButtonItem不调用action [英] backBarButtonItem doesn't call action

问题描述

我想在点击我的backButton时调用一个动作，但这似乎不是它。

I would like to call an action when my backButton is clicked but this doesn't seem to be it.

rootViewController中的viewDidLoad ：

self.navigationItem.backBarButtonItem = [[[UIBarButtonItem alloc] 
                                          initWithTitle:@"Logout" 
                                          style:UIBarButtonItemStyleDone 
                                          target:self 
                                          action:@selector(logout)] autorelease];

它的标题是正确的，但没有任何反应。

The title of it is correct but nothing happens.

logout （在rootViewController中）
header：

logout (in the rootViewController) header:

-(void)logout;

正文：

-(void)logout {
     NSLog(@"test");
     [[User owner] logout];
}

任何人都可以告诉我如何解决这个问题，因为我不知道。谢谢

Could anyone tell me how to solve this, since i have no idea. Thanks

推荐答案

您只能更改backBarButton的标题。您可以尝试使用viewWillDisappear或viewDidDisappear函数，但不仅可以在按下按钮后调用它们。 leftBarButton是一个更好的解决方案，但是这个按钮的视图与backBarButton的视图不同。

You can change only the title of backBarButton. You can try to use viewWillDisappear or viewDidDisappear functions but they could be called not only after you press your button. The leftBarButton is a better solution but this button's view differs from backBarButton's view.

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