MyDelegate里边的设置

1.普通设置

self.window = [[UIWindow alloc] initWithFrame: [[UIScreen mainScreen]bounds]];
    self.window.backgroundColor = [UIColor orangeColor];
    ViewController *vc = [[ViewController alloc]init];
    
    self.window.rootViewController = vc;
    [self.window makeKeyAndVisible];
    return YES;

//这样就进入ViewController中

2.创建一个导航栏

self.window = [[UIWindow alloc] initWithFrame: [[UIScreen mainScreen]bounds]];
    self.window.backgroundColor = [UIColor orangeColor];
    MyTableViewController *vc = [[MyTableViewController alloc]init];
    UINavigationController *nvc = [[UINavigationController alloc] initWithRootViewController:vc];
    self.window.rootViewController = nvc;
    [self.window makeKeyAndVisible];
    return YES;

//这样进去就有一个导航栏

记得包含头文件