如何判断何时在 UINavigationControllerStack 中按下后退按钮 [英] How to tell when back button is pressed in a UINavigationControllerStack

问题描述

是否可以检查 UINavigationController 堆栈中何时按下后退按钮?我尝试向 self.navigationItem.backBarButtonItem 添加动作和目标，但无济于事.

Is it possible to check when the back button is pressed in a UINavigationController stack? I've tried adding a action and target to self.navigationItem.backBarButtonItem to no avail.

有人有解决办法吗?

推荐答案

你可以试试我的方法:

在你的 ViewController 中写入:

Write in your ViewController:

UIBarButtonItem *backBt = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"imageNameOfBackButton"] style:UIBarButtonItemStyleBordered target:self action:@selector(backBt_touch:)];
self.navigationItem.leftBarButtonItem = backBt;

以及动作方法:

- (void)backBt_touch:(id)sender {
  [self.navigationController popViewControllerAnimated:YES];
}

你必须拍一张你想要的后退按钮的照片.

You have to take a photo of back button you want.

viewController弹出时隐藏后退按钮的动画和iOS的不一样！

Animation of hiding back button when viewController is popped is not the same animation of iOS!

P/s: 我已经从模拟器中得到它.希望有用！:)

P/s: I've get it from simulator. Hope it useful! :)

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