Iphone 在Objective-c中以编程方式将底部栏设置为选项卡栏

在IB中，我可以将底部栏设置为屏幕截图下方视图的选项卡栏，但如何通过实现（.m）文件中的代码进行设置

谢谢

---

创建要使用的

UIViewController

的

NSArray

。然后实例化一个

UITabBarController

，并将

viewControllers

属性设置为此数组。然后将

tabBarController

的

视图添加到窗口中。所有这些都应该在AppDelegate.m文件中完成。例如：

- (BOOL)application:(UIApplication *)application 
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
{   

    UIViewController *vc1 = [[UIViewController alloc] init];
    UIViewController *vc2 = [[UIViewController alloc] init];
    CustomViewController *vc3 = [[CustomViewController alloc] init];

    NSArray *viewControllers = [NSArray arrayWithObjects:vc1, vc2, vc3, nil];
    [vc1 release]; [vc2 release]; [vc3 release];

    UITabBarController *tabBarController = [[UITabBarController alloc] init];
    [tabBarController setViewControllers:viewControllers];

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

    return YES;
}

创建要使用的
UIViewController
s的
NSArray
。然后实例化一个
UITabBarController
，并将
viewControllers
属性设置为此数组。然后将
tabBarController
的
视图添加到窗口中。所有这些都应该在AppDelegate.m文件中完成。例如：

- (BOOL)application:(UIApplication *)application 
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
{   

    UIViewController *vc1 = [[UIViewController alloc] init];
    UIViewController *vc2 = [[UIViewController alloc] init];
    CustomViewController *vc3 = [[CustomViewController alloc] init];

    NSArray *viewControllers = [NSArray arrayWithObjects:vc1, vc2, vc3, nil];
    [vc1 release]; [vc2 release]; [vc3 release];

    UITabBarController *tabBarController = [[UITabBarController alloc] init];
    [tabBarController setViewControllers:viewControllers];

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

    return YES;
}