iPhone開發 使用tabbarcontroller

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.window.backgroundColor = [UIColor whiteColor];
   
    //產生各個視圖控制器
    MedicalData* aa = [[MedicalData alloc]init];
    HealthRecord* bb = [[HealthRecord alloc]init];
    KonwledgeBase* cc = [[KonwledgeBase alloc]init];
    CarePrescription* dd = [[CarePrescription alloc]init];
    //加入一個數組   
    NSArray* controllerArray = [[NSArray alloc]initWithObjects:aa,bb,cc,dd ,nil];
    //建立UITabBarController控制器  (定義在.h中，否在開啟arc會自動釋放掉，記憶體訪問出錯)
    tabBarController = [[UITabBarController alloc]init];
    //設定委託
    tabBarController.delegate = self;
    //設定UITabBarController控制器的viewControllers屬性為我們之前產生的數組controllerArray
    tabBarController.viewControllers = controllerArray;
    //預設選擇第1個視圖選項卡（索引從0開始的）
    tabBarController.selectedIndex = 0;
    //設定TabBarItem的標題與圖片
    [(UITabBarItem *)[tabBarController.tabBar.items objectAtIndex:0] setTitle:@"aa"]; 
    [(UITabBarItem *)[tabBarController.tabBar.items objectAtIndex:0] setImage:[UIImage imageNamed:@"1517.png"]];  //30 * 30
    [(UITabBarItem *)[tabBarController.tabBar.items objectAtIndex:1] setTitle:@"bb"];
    [(UITabBarItem *)[tabBarController.tabBar.items objectAtIndex:1] setImage:[UIImage imageNamed:@"light.png"]];
    [(UITabBarItem *)[tabBarController.tabBar.items objectAtIndex:2] setTitle:@"cc"];
    [(UITabBarItem *)[tabBarController.tabBar.items objectAtIndex:2] setImage:[UIImage imageNamed:@"podcaste.png"]];
    [(UITabBarItem *)[tabBarController.tabBar.items objectAtIndex:3] setTitle:@"dd"];
    [(UITabBarItem *)[tabBarController.tabBar.items objectAtIndex:3] setImage:[UIImage imageNamed:@"setting.png"]];
    [(UITabBarItem *)[tabBarController.tabBar.items objectAtIndex:4] setTitle:@"ee"];
    [(UITabBarItem *)[tabBarController.tabBar.items objectAtIndex:4] setImage:[UIImage imageNamed:@"unlock.png"]];
    //讀取
    UIViewController* activeController = tabBarController.selectedViewController;
    if(activeController == aa){
        //
    }
    //把tabBarController的view作為子視圖添加到window
    [self.window addSubview:tabBarController.view];
    [self.window makeKeyAndVisible];
    return YES;

}

 摘自 凡娃軟體