【资料图】

1.//从storyboard获取控制器

UIStoryboard *storyboard = [UIStoryboard  storyboardWithName:@"test"  bundle:nil];

2.//获取storyboard的第一个控制器

UIViewController *vc = [storyboard instantiateInitialViewController];

3.//获取sotryboard这顶id的控制器

UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:@"SecondVC"];

4.//设置窗口的根视图

self.window.rootViewController = vc;