1.单View
self.window= [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor=[UIColor grayColor];
IOS01ButtonViewController *ios01MyButton=[[IOS01ButtonViewController alloc]init];
self.window.rootViewController=ios01MyButton;
[self.window makeKeyAndVisible];
2.导航
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
NavigationBarViewController *root=[[NavigationBarViewController alloc]init];
NavigationViewController *nav = [[NavigationViewController alloc]initWithRootViewController:root];
self.window.rootViewController=nav;
/*UITabBarViewController
*navigation=[[UITabBarViewController alloc]init];
self.window.rootViewController =navigation;
ButtonViewController *button1=[[ButtonViewController alloc]init];
button1.tabBarItem.title=@"Messgae";
button1.tabBarItem.badgeValue=@"99+";
TooBarViewController *button2=[[TooBarViewController alloc]init];
button2.tabBarItem.title=@"Messgae";
button2.tabBarItem.badgeValue=@"99+";
button2.view.backgroundColor=[UIColor blueColor];
//[navigation addChildViewController:button1];
//[navigation addChildViewController:button2];
navigation.viewControllers=@[button1,button2 ];
[self.window makeKeyAndVisible];
IOS 开发didFinishLaunchingWithOptions 设置启动View
原文：http://www.cnblogs.com/zhangleixy/p/4933526.html