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iPhone——向用户在 moreNavigationController 中选择选项卡时创建的导航栏添加一个按钮

发布于 2024-09-11 02:56:36 字数 209 浏览 4 评论 0原文

我的标签栏有十个标签。因此，其中六个被推入“更多”选项卡。其中一些没有 UINavigationControllers。即，该选项卡由 UIViewController 子类控制，该子类不是导航控制器。

当用户选择其中之一时，相应的视图控制器就会出现，顶部有一个 UINavigationBar。

我想向该导航栏添加一个按钮。我怎样才能做到这一点？

谢谢。

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往日情怀 2024-09-18 02:56:37

好吧，如果您想以编程方式执行此操作，那么我建议将 UITabBar 中的每个 viewController 替换为容纳相应视图控制器的 UINavigationController。

所以，你的旧代码看起来像这样：

- (void)applicationDidFinishLaunching:(UIApplication *)application {
  UITabBarController *tbc = [[[UITabBarController alloc]init]autorelease];
  [window addSubview:tbc.view];
  UIViewController *mapVC = [[[UIViewController alloc] init]autorelease];
  NSArray *tabViewControllerArray = [NSArray arrayWithObjects:self.mapVC, nil];
  tbc.viewControllers = tabViewControllerArray;
}

新代码应该是：

- (void)applicationDidFinishLaunching:(UIApplication *)application {
  UITabBarController *tbc = [[[UITabBarController alloc]init]autorelease];
  [window addSubview:tbc.view];
  UIViewController *mapVC = [[[UIViewController alloc] init]autorelease];
  // add the viewController to a UINavigationController
  UINavigationController *mapNav = [[[UINavigationController alloc] initWithRootViewController:mapVC]autorelease];
  // put the nav controller in the array instead
  NSArray *tabViewControllerArray = [NSArray arrayWithObjects:mapNav, nil];
  tbc.viewControllers = tabViewControllerArray;

  // this code adds a right button to the mapBav navigationBar
  // this uses a custom view, but you could use a standard UIBarButtonItem too 
  NSArray *items = [NSArray arrayWithObjects: [UIImage imageNamed:@"flag-icon.png"], nil];
  UISegmentedControl *tableControl = [[[UISegmentedControl alloc] initWithItems:items]autorelease];
  tableControl.segmentedControlStyle = UISegmentedControlStyleBar;
  UIBarButtonItem *segmentBarItem = [[[UIBarButtonItem alloc] initWithCustomView:tableControl] autorelease];
  self.navigationItem.rightBarButtonItem = segmentBarItem;
}

Well, if you want to do this programmatically, then I would suggest replacing each of your viewControllers in your UITabBar with UINavigationControllers that house the respective view controllers.

So, your old code looks something like this:

- (void)applicationDidFinishLaunching:(UIApplication *)application {
  UITabBarController *tbc = [[[UITabBarController alloc]init]autorelease];
  [window addSubview:tbc.view];
  UIViewController *mapVC = [[[UIViewController alloc] init]autorelease];
  NSArray *tabViewControllerArray = [NSArray arrayWithObjects:self.mapVC, nil];
  tbc.viewControllers = tabViewControllerArray;
}

New code should be:

- (void)applicationDidFinishLaunching:(UIApplication *)application {
  UITabBarController *tbc = [[[UITabBarController alloc]init]autorelease];
  [window addSubview:tbc.view];
  UIViewController *mapVC = [[[UIViewController alloc] init]autorelease];
  // add the viewController to a UINavigationController
  UINavigationController *mapNav = [[[UINavigationController alloc] initWithRootViewController:mapVC]autorelease];
  // put the nav controller in the array instead
  NSArray *tabViewControllerArray = [NSArray arrayWithObjects:mapNav, nil];
  tbc.viewControllers = tabViewControllerArray;

  // this code adds a right button to the mapBav navigationBar
  // this uses a custom view, but you could use a standard UIBarButtonItem too 
  NSArray *items = [NSArray arrayWithObjects: [UIImage imageNamed:@"flag-icon.png"], nil];
  UISegmentedControl *tableControl = [[[UISegmentedControl alloc] initWithItems:items]autorelease];
  tableControl.segmentedControlStyle = UISegmentedControlStyleBar;
  UIBarButtonItem *segmentBarItem = [[[UIBarButtonItem alloc] initWithCustomView:tableControl] autorelease];
  self.navigationItem.rightBarButtonItem = segmentBarItem;
}

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爱的那么颓废 2024-09-18 02:56:37

有两种方法可以解决这个问题。

只需为每个选项卡使用 UINavigationController，并在其中包含视图控制器。但听起来您不想这样做，所以：
使用 Interface Builder 放置一个 UINavigationBar。导航栏 http://cl.ly/395fb8c0a9e9df781897/content
然后，您可以拖入 UIBarButtonItems 并根据您的喜好配置它们，也在 IB 中。按钮 http://cl.ly/7501d3e8e5d57dac5e00/content