UINavigationController和UITabBarController共存的例子

1. - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions  
2. {  
3.     FirstViewController *firstViewController=[[FirstViewController alloc]initWithNibName:@"FirstViewController" bundle:nil];  
4.     UINavigationController *navControl1=[[UINavigationController alloc]initWithRootViewController:firstViewController];  
5.     [firstViewController release];  
6.       
7.     SecondViewController *secondViewController=[[SecondViewController alloc]initWithNibName:@"SecondViewController" bundle:nil];  
8.     UINavigationController *navControl2=[[UINavigationController alloc]initWithRootViewController:secondViewController];  
9.     [secondViewController release];  
10.       
11.     self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];  
12.   
13.     self.tabBarController = [[[UITabBarController alloc] init] autorelease];  
14.     self.tabBarController.viewControllers = [NSArray arrayWithObjects:navControl1, navControl2, nil];  
15.       
16.     [navControl1 release];  
17.     [navControl2 release];  
18.     self.window.rootViewController = self.tabBarController;  
19.   
20.     [self.window makeKeyAndVisible];  
21.     return YES;  
22. }  

如果某个tabBar不需要navigation，那么用如下代码初始化对应的control

UIViewController *viewController2 = [[[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil] autorelease];