iOS 将storybord中的视图与viewcontroller相关联

如果在storybord中拖入一个viewcontroller，如何才能使用它

https://www.jianshu.com/p/66702f38e977

https://blog.csdn.net/xy_26207005/article/details/51002707

https://blog.csdn.net/liuyinghui523/article/details/62036465