如何更改UINavigationControler上的后退按钮 [英] How do I change the back button on a UINavigationControler

问题描述

在视图中，我想更改它，因为我有以下代码，但失败了.

In the view I want to change it for I have the following code but it fails.

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    //Logout button
    UIBarButtonItem * logout = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(goBack)];
    logout.title = @"Logout";
    nav_delegate.navigationController.navigationItem.leftBarButtonItem = logout;
    [logout release];
}

谢谢您的帮助.

推荐答案

这就是答案.在视图控制器中:

Here's the answer. In the view controller:

- (void)viewDidLoad {
    [super viewDidLoad];
    self.title = @"X";
    //Logout button
    UIBarButtonItem * logout = [[UIBarButtonItem alloc] initWithTitle:@"Logout" style: UIBarButtonItemStylePlain target:self action:@selector(goBack)];
    self.navigationItem.leftBarButtonItem = logout;
    [logout release];
}

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