控制器创建的三种方式

控制器创建的三种方式    

1.直接创建

  SNViewController *vc = [[SNViewControlleralloc]init];

  self.window.rootViewController = vc;

2.通过storyboard创建

  UIStoryboard *storyboard = [UIStoryboardstoryboardWithName:@"main"bundle:nil];

    创建storyboard中箭头指向的控制器

  SNViewController *vc  = [storyboardinstantiateInitialViewController];

  通过identifier创建  

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

3.nib

  SNViewController *vc = [[SNViewControlleralloc]initWithNibName:@"sn" bundle:nil];