用手指做一个UIView拖动

我有 mainViewController 但是我内部有一个小的 UIView ，当你点击 MKAnnotationView 在 MKMapKit 中，所以我需要 UIView 才可以拖放屏幕的任何部分。

I have the mainViewController but I have an small UIView inside that is activated when you tap a MKAnnotationView in the MKMapKit, so I need that UIView to be draggable in any part of the screen.

我的应用程序的示例屏幕截图：

An example screenshot of my app:

圆圈是一个例子，我想我可以拖动小UIView的任何一点。

The circle is an example of point, I suppose I can drag for any point of the "small" UIView.

我尝试使用 UITapGestureRecognizer 但它没有用我的代码不够好，我无法将其拖动，因为它只是点击，而不是点击和移动。

I tried using UITapGestureRecognizer but it didn't worked as my code was not good enough and I could not made it draggable because it's only the tap, not tap and move.

我希望你能帮助我。