navigationItem.backBarButtonItem不工作？为什么上一个菜单仍显示为按钮？ [英] navigationItem.backBarButtonItem not working? Why is the previous menu still showing as the button?

问题描述

尝试在向下钻取导航控制器中自定义我的后退按钮。

Trying to customize my back button in a drilldown navigation controller.

在我的一个视图控制器上，我有一个添加按钮，其中代码以编程方式生成一个新的 UIViewController ：

On my one view controller I have an Add button where the code programatically generates a new UIViewController:

- (void)add:(id)sender 
{
    MyAddViewController *addController = [[MyAddViewController alloc] initWithNibName:@"MyAddViewController" bundle:nil];

    [self.navigationController pushViewController:addController animated:YES];

    [addController release];
}

这是有效的，当我点击添加按钮时，它会深入查看新视图。在 myDdViewController.m 的 viewDidLoad 方法内，我有：

This works and when I click the add button it drills down into the new view. Inside the viewDidLoad method of MyAddViewController.m I have:

self.navigationItem.backBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStylePlain target:nil action:nil] autorelease];

但这不起作用。导航控制器中的后退按钮仍然是堆栈上前一个视图控制器的标题。看来这条线什么也没做。我错过了什么吗？

But this isn't working. The back button in the navigation controller remains the title of the previous view's controller on the stack. It seems that line does nothing. Did I miss something?

谢谢

推荐答案

这只会起作用在viewController之后的每个子节点上有 self.navigationItem.backBarButtonItem 。

This will only work on each child after the viewController that has self.navigationItem.backBarButtonItem.

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