//將我們的storyBoard實例化，“Main”為StoryBoard的名稱
UIStoryboard *mainStoryBoard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
?//將第二個控制器實例化，"main"為我們設置的控制器的ID
UIViewController *vc=[mainStoryBoard instantiateViewControllerWithIdentifier:@"main"];
?//跳轉
[self.navigationController pushViewController:vc animated:YES];
