“self.navigationItem.rightBarButtonItem”不工作

发布于 2024-12-06 05:48:09 字数 562 浏览 0 评论 0原文

我有以下代码直接取自 Apple 的 NavBar 示例代码。我将其放入我的应用程序中以模态方式呈现的视图的 viewDidLoad 方法中，但它不起作用。

UIBarButtonItem *addButton = [[[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"AddTitle", @"")
                                                               style:UIBarButtonItemStyleBordered
                                                              target:self
                                                              action:@selector(addAction:)] autorelease];
self.navigationItem.rightBarButtonItem = addButton;

有什么建议吗？

原文

I have the following code taken straight from the NavBar sample code from Apple. I put this in the viewDidLoad method for a view in my app that is being presented modally, and it wont work.

UIBarButtonItem *addButton = [[[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"AddTitle", @"")
                                                               style:UIBarButtonItemStyleBordered
                                                              target:self
                                                              action:@selector(addAction:)] autorelease];
self.navigationItem.rightBarButtonItem = addButton;

Any Suggestions?

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柠檬色的秋千 2024-12-13 05:48:10

好的解释解决方案：

presentModalViewController：animated：以模态方式呈现一个viewController，它没有UINavigationBar，因此您可以做一些事情：

在viewController的笔尖中添加一个UINavigationBar并添加那里的“添加”按钮以及您需要设置的一切。
您可以使用 pushViewController:animated: 以模态方式显示将位于导航堆栈上的 viewController，并使用 UINavigationBar 供您添加按钮（
如果您的第一个 viewController 不是UINavigationController，使用 pushViewController:animated: 无法解决该问题，因此您可以以 viewController 作为模态呈现 UINavigationController rootViewController：

 YourViewController *viewController =[[[YourViewController alloc] initWithNibName:@"YourViewController" bundle:nil] autorelease];
    UINavigationController *navController = [[[UINavigationController alloc] initWithRootViewController:viewController] autorelease];
    [self.navigationController presentModalViewController:navController animated:YES];

希望这些有帮助

Okay explained solution:

presentModalViewController:animated: presents a viewController modally, which does not have a UINavigationBar, so you can do some things:

Add a UINavigationBar in your viewController's nib and add the "Add" button there and everything you need to setup.
You can use pushViewController:animated: to show the viewController modally which will be on the navigation stack and have the UINavigationBar for you to add your button
If your first viewController is not a UINavigationController, using pushViewController:animated: won't solve it, so you can present a UINavigationController modally with your viewController as the rootViewController:

 YourViewController *viewController =[[[YourViewController alloc] initWithNibName:@"YourViewController" bundle:nil] autorelease];
    UINavigationController *navController = [[[UINavigationController alloc] initWithRootViewController:viewController] autorelease];
    [self.navigationController presentModalViewController:navController animated:YES];

Hope any of this helps

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枉心 2024-12-13 05:48:10

您需要在呈现其他视图的页面上使用这些代码行。

sceondController *obj=[[[sceondController alloc] initWithNibName:@"sceondController" bundle:nil] autorelease];
        UINavigationController *navController=[[[UINavigationController alloc] initWithRootViewController:obj] autorelease];

        [self.navigationController presentModalViewController:navController animated:NO];

并在第二个视图中使用与制作导航按钮相同的代码。

也许它可以解决您的问题。

You need to use these lines of code on the page where you present the other view.

sceondController *obj=[[[sceondController alloc] initWithNibName:@"sceondController" bundle:nil] autorelease];
        UINavigationController *navController=[[[UINavigationController alloc] initWithRootViewController:obj] autorelease];

        [self.navigationController presentModalViewController:navController animated:NO];

and in second view use same code which you are using for making navigation button.

May be it resolves your problem.

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云巢 2024-12-13 05:48:10

我假设你的视图控制器实际上是一个 UINavigationController 并且其他一切都已就位。在这种情况下，我会改变两件事。

我不会自动释放 UIBarButtonItem。对于视图控制器来说，这往往不可靠，因此将按钮添加到要在清理时释放的事物列表中
我将使用 setter 函数来设置按钮。这是我在导航控制器中运行的代码
clearAllButton = [[UIBarButtonItem alloc] initWithTitle:@"全部清除" style:UIBarButtonItemStylePlain target:self action:@selector(rightButtonPressed:)];
[[self navigationItem] setRightBarButtonItem:clearAllButton];