UINavigationController 与 UITabBarController

http://www.cnblogs.com/YouXianMing/p/3756904.html

// index start from 1.
UITabBarItem *newsItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemFavorites tag:];
//UITabBarItem *homeItem = [[UITabBarItem alloc] initWithTitle:@"首页" image:[UIImage imageNamed: @""] tag:1];
NewsViewController *newsController = [[NewsViewController alloc] init];
newsController.tabBarItem = newsItem;
[newsItem release];
 
UINavigationController *newsNav = [[UINavigationController alloc] initWithRootViewController:newsController];
[newsController release];

// repeat other here
 
NSArray *viewControllers = @[newsNav];
[newsNav release];
 
UITabBarController *tabController = [[UITabBarController alloc]init];
// tabController.viewControllers = @[newsNav];
[tabController setViewControllers:viewControllers animated:YES];
 
self.window.rootViewController = tabController;