UITabController iphone开发

Question

我正在学习Iphone UI选项卡控制器教程，我基本上模仿了底部link text的代码

// Create a temporary window object to assign to the window property 
    UIWindow *tempWindow = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen]
 bounds]];
    // Make the window background red so that you can see that the window has been added
    tempWindow.backgroundColor = [UIColor grayColor];
    self.window = tempWindow;
    [tempWindow release];


    // add the tab bar controller
    UITabBarController *tabBarController;
    tabBarController = [[UITabBarController alloc] initWithNibName:nil bundle:nil];


    PhoneContactsView *phoneContactsView = [[[PhoneContactsView alloc] init] autorelease];
    OtherContactsView *otherContactsView = [[[OtherContactsView alloc] init] autorelease];

    //Add all the view to the tabBarView
    tabBarController.viewControllers = [NSArray arrayWithObjects:otherContactsView,phoneContactsView, nil];

    //Add all the button's to the bar

    UITabBarItem *otherContactsTabBarItem = 
    [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemTopRated tag:1];       
    otherContactsBarItem.title = @"My Contacts";
    otherContactsView.tabBarItem = otherContactsBarItem;    
    [otherContactsBarItem release];

    UITabBarItem *phoneContactsBarItem =
    [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemContacts tag:1];       
    phoneContactsView.tabBarItem = phoneContactsBarItem;    
    [phoneContactsBarItem release];

    tabBarController.selectedViewController
    = [tabBarController.viewControllers objectAtIndex:0];

    [window addSubview:tabBarController.view];
    [tabBarController release];
    [window makeKeyAndVisible];

OtherContacts和PhoneContacts只是默认的空视图，我只是更改了它们的背景以确保它们是加载的。当我运行此命令时，加载了第一个视图，但我无法单击选项卡栏在视图之间切换我是否遗漏了什么？

Answer 1

找到错误：

[window addSubview:tabBarController.view];
[tabBarController release]; <------------- I am releasing the tabBarController while still in use 
[window makeKeyAndVisible];

这就是标签栏控制器没有响应的原因。-daniel

Answer 2

如果OtherContacts和PhoneContacts是"UIView“类而不是UIViewController类，这就解释了问题--选项卡栏控制器需要UIViewController引用。