How can I move a GUI object with the players touch?

I'm working on adding mobile support to my game. I've never worked with mobile before.

I needed to make a new input UI for the camera controls. This control is a slider. It is supposed to slide back and forth and the position of that slider will determine how fast the camera will rotate.

The problem is, I don't know how to make the UI follow the players touch. The ImageButton that will be moving is inside a frame and needs to stay within the bounds of that frame.