我可以添加一个完全免费的 UIBarButtonItem 吗？

发布于 2024-11-25 01:48:59 字数 1147 浏览 0 评论 0原文

我在视图控制器中以编程方式创建了一个导航栏和一个标签。现在我想添加一个“完成”按钮，但似乎无法找到不使用 IB 的方法......有什么方法可以做到这一点吗？

这是我的视图控制器的 viewDidLoad：

//Adding navBar programmatically 
CGFloat width = self.view.frame.size.width;
UINavigationBar *navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0,0,width,52)];
navBar.autoresizingMask = UIViewAutoresizingFlexibleWidth;
[self.view addSubview:navBar];

//Adding label to navBar programmatically 
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10,2,width-20,14)];
label.autoresizingMask = UIViewAutoresizingFlexibleWidth;
label.text = @"TITLE";
label.backgroundColor = [UIColor clearColor];
label.font = [UIFont systemFontOfSize:22];
label.shadowOffset = CGSizeMake(1,1);
label.textColor = [UIColor whiteColor];
label.textAlignment = UITextAlignmentCenter;
[navBar addSubview:label];

//Adding back button to navBar programmatically 
UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStylePlain target:self action:@selector(dismissView:)];
self.navigationItem.leftBarButtonItem = rightButton;

最后一部分显然不起作用...

感谢您的帮助！

原文

I created a nav bar and a label programmatically in my view controller. Now I want to add a "done" button but cant seem to find a way without using IB....is there any way to do that?

Here is my view controller's viewDidLoad:

//Adding navBar programmatically 
CGFloat width = self.view.frame.size.width;
UINavigationBar *navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0,0,width,52)];
navBar.autoresizingMask = UIViewAutoresizingFlexibleWidth;
[self.view addSubview:navBar];

//Adding label to navBar programmatically 
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10,2,width-20,14)];
label.autoresizingMask = UIViewAutoresizingFlexibleWidth;
label.text = @"TITLE";
label.backgroundColor = [UIColor clearColor];
label.font = [UIFont systemFontOfSize:22];
label.shadowOffset = CGSizeMake(1,1);
label.textColor = [UIColor whiteColor];
label.textAlignment = UITextAlignmentCenter;
[navBar addSubview:label];

//Adding back button to navBar programmatically 
UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStylePlain target:self action:@selector(dismissView:)];
self.navigationItem.leftBarButtonItem = rightButton;

Last part obviously doesnt work...

Thanks for any help!

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萌逼全场 2024-12-02 01:48:59

为什么不使用 UIToolBar 来代替？

要将按钮添加到 UINavigationBar，您需要创建一个 UINavigationItem。如果您将 UINavigationBar 用作 UINavigationController 的一部分（这是常见情况），则这是自动完成的，作为独立视图，您必须自己执行此操作。

UINavigationItem *item = [[[UINavigationItem alloc] initWithTitle:@""] autorelease];
item.leftBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(dismissView:)] autorelease];
[navBar setItems:[NSArray arrayWithObject:item] animated:NO];

Why are you not using a UIToolBar instead?

To add buttons to a UINavigationBar, you need to create a UINavigationItem. If you're using UINavigationBar as part of UINavigationController (as is the common case), this is done automatically, as a standalone view, you have to do this yourself.

UINavigationItem *item = [[[UINavigationItem alloc] initWithTitle:@""] autorelease];
item.leftBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(dismissView:)] autorelease];
[navBar setItems:[NSArray arrayWithObject:item] animated:NO];

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