varappDelegate =UIApplication.sharedApplication().delegateas!AppDelegate

@H_403_5@Swift中 有时候添加ViewController的时候，我们需要使用UIStoryboard进行加载

@H_403_5@我们在AppDelegate中创建MainStoryBoard

@H_403_5@varstoryBoard:UIStoryboard?

@H_403_5@storyBoard=UIStoryboard(name:"Main",bundle:nil)

@H_403_5@ funcgetMainStoryBoard()->UIStoryboard{

@H_403_5@ returnstoryBoard!

@H_403_5@ }

@H_403_5@varcir_vc:CircleImageViewController! =appDelegate.getMainStoryBoard().instantiateViewControllerWithIdentifier("CircleImageViewController")as!CircleImageViewController

@H_403_5@ self.navigationController?.pushViewController(cir_vc,animated:true)

@H_403_5@通过StoryBoardId创建了ViewController