禁用后退按钮并将取消按钮放在导航视图控制器中 - 就像联系人 iPhone 应用程序

问题描述

我有一个导航视图控制器，导航堆栈中有 3 个视图控制器.现在在第三个也是最可见的视图控制器上，我有一个默认的后退按钮.

I have a navigation view controller and there are 3 view controllers in the navigation stack. Now on the third and top most visible view controller I have a default back button coming in.

我需要将这个视图控制器带入我所做的编辑模式...现在要求有一个取消按钮作为左栏按钮项而不是后退按钮.

I need to bring this view controller in edit mode which I did... Now the requirement is to have a cancel button as the left bar button item instead of back button.

这类似于 iPhone 的联系人应用程序提供的功能，您可以在其中编辑特定联系人.

This is similar to the functionality given by contacts application of iPhone where you edit a particular contact.

任何线索如何实现这一点?

Any clue how to achieve this?

推荐答案

要隐藏后退按钮并添加左栏按钮使用-

To hide back button and add a left bar button use-

[self.navigationItem setHidesBackButton:TRUE];

    UIBarButtonItem *leftBarButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector()];
    [self.navigationItem setLeftBarButtonItem:leftBarButton];
    [leftBarButton release];

然后以编程方式返回到上一个视图控制器，您可以这样做-

And then to programmatically return to the previous view controller, you can do-

[self.navigationController popViewControllerAnimated:YES];

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