// 加载storyboard
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
// 加载箭头指向的控制器
UIViewController *vc = [storyboard instantiateInitialViewController];
// 加载storyboard
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
// 加载箭头指向的控制器
UIViewController *vc = [storyboard instantiateInitialViewController];