iPhone开发 tabBarController与UINavigationController结合

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindowalloc] initWithFrame:[[UIScreenmainScreen] bounds]];
    self.window.backgroundColor = [UIColorwhiteColor];
   
    //生成各个视图控制器
    MedicalData* aa = [[MedicalDataalloc]init];
    UINavigationController *aaNav = [[UINavigationControlleralloc] initWithRootViewController:aa];
    HealthRecord* bb = [[HealthRecordalloc]init];
    UINavigationController *bbNav = [[UINavigationControlleralloc] initWithRootViewController:bb];
    KonwledgeBase* cc = [[KonwledgeBasealloc]init];
    UINavigationController *ccNav = [[UINavigationControlleralloc] initWithRootViewController:cc];
    CarePrescription* dd = [[CarePrescriptionalloc]init];
    UINavigationController *ddNav = [[UINavigationControlleralloc] initWithRootViewController:dd];
    //加入一个数组   
    NSArray* controllerArray = [[NSArray alloc]initWithObjects:aaNav,bbNav,ccNav,ddNav ,nil];
    //创建UITabBarController控制器  (定义在.h中，否在开启arc会自动释放掉，内存访问出错)
    tabBarController = [[UITabBarControlleralloc]init];
    //设置委托www.2cto.com
    tabBarController.delegate = self;
    //设置UITabBarController控制器的viewControllers属性为我们之前生成的数组controllerArray
    tabBarController.viewControllers = controllerArray;
    //默认选择第1个视图选项卡（索引从0开始的）
    tabBarController.selectedIndex = 0;
    //设置TabBarItem的标题与图片//30 * 30
    [(UITabBarItem *)[tabBarController.tabBar.itemsobjectAtIndex:0] setTitle:@"体检数据"]; 
    [(UITabBarItem *)[tabBarController.tabBar.itemsobjectAtIndex:0] setImage:[UIImageimageNamed:@"check_no.png"]]; 
    [(UITabBarItem *)[tabBarController.tabBar.itemsobjectAtIndex:1] setTitle:@"健康档案"];
    [(UITabBarItem *)[tabBarController.tabBar.itemsobjectAtIndex:1] setImage:[UIImageimageNamed:@"check_yes.png"]];
    [(UITabBarItem *)[tabBarController.tabBar.itemsobjectAtIndex:2] setTitle:@"知识库"];
    [(UITabBarItem *)[tabBarController.tabBar.itemsobjectAtIndex:2] setImage:[UIImageimageNamed:@"ckb1.png"]];
    [(UITabBarItem *)[tabBarController.tabBar.itemsobjectAtIndex:3] setTitle:@"保健处方"];
    [(UITabBarItem *)[tabBarController.tabBar.itemsobjectAtIndex:3] setImage:[UIImageimageNamed:@"ckb2.png"]];
    //读取
    UIViewController* activeController = tabBarController.selectedViewController;
    if(activeController == aa){
        //
    }
    //把tabBarController的view作为子视图添加到window
    [self.windowaddSubview:tabBarController.view];
    [self.windowmakeKeyAndVisible];
    returnYES;
 
}
//切换事件
- (void)tabBarController:(UITabBar *)tb  didSelectViewController:(UIViewController *__strong)viewController
{
    NSLog(viewController.title);
    if([viewController.title isEqualToString:@"保健处方"])
    {
        [(UITabBarItem *)[tabBarController.tabBar.itemsobjectAtIndex:3] setBadgeValue:nil];
        //[(UIT