張亮的博客園

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    //    初始化窗口
    self.window=[[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
    //    設置窗口顏色
    self.window.backgroundColor=[UIColor redColor];
    //    自定義viewcontroller
    //    UIViewController *root=[[UIViewController alloc]init];
    //    root.view.backgroundColor=[UIColor blueColor];
    //    創建UIStoryboard對象
    UIStoryboard *storybord= [UIStoryboard storyboardWithName:@"Main" bundle:nil];
    //    1:創建指定storybordId的viewcontroller
    UIViewController *root=[storybord instantiateViewControllerWithIdentifier:@"green"];
    //     2:創建指定默認的viewcontroller
    //    UIViewController *root2=[storybord instantiateInitialViewController];
    //    設置rootViewController
    self.window.rootViewController=root;
    //顯示窗口
    [self.window makeKeyAndVisible];
    return YES;
}