如何装载Storyboard中的ViewController？

 

如上图所示，如何装载Storyboard中指定的ViewController?

首先，需要指定ViewController的ID，如上图右上方红色方框内的Storyboard ID。然后使用下面的代码：

UIStoryboard* mainStoryboard = [UIStoryboard storyboardWithName:@"MainStoryboard_iPhone" bundle:nil];
LeftViewController *leftController = [mainStoryboard instantiateViewControllerWithIdentifier:@"leftViewController"];

或者使用下面的代码：

UIStoryboard* mainStoryboard = [UIStoryboard storyboardWithName:@"MainStoryboard_iPhone" bundle:nil];
ViewController *leftController = [mainStoryboard instantiateViewControllerWithIdentifier:@"leftViewController"];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:leftController];