Make a UIView draggable with the finger

Question

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.

An example screenshot of my app:

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

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.

I hope you can help me.

Answer 1

edited after a commend by @borrrden

UIPanGestureRecognizer is suitable. In your handler function check it's state variable.

typedef enum {
   UIGestureRecognizerStatePossible,

   UIGestureRecognizerStateBegan,     // this will be the value on touch
   UIGestureRecognizerStateChanged,   // ~ on drag
   UIGestureRecognizerStateEnded,     // ~ on end of touch event
   UIGestureRecognizerStateCancelled,

   UIGestureRecognizerStateFailed,

   UIGestureRecognizerStateRecognized = UIGestureRecognizerStateEnded
} UIGestureRecognizerState;

Answer 2

1. Use UIPanGestureRecognizer instead of UITapGestureRecognizer
2. Set userInteractionEnabled = YES for your view
3. Review this nice tutorial about gesture recognizers: Touches. There is nice example of dragging views.

Answer 3

For create draggable and resizable UIView This example (with source code) really useful for you.

And also read This Document and This Document This document is related to UIPanGestureRecognizer