UILongPressGestureRecognizer recognize only when moving my finger - iphone

Question

i try to use UILongPressGestureRecognizer in my App and the problem is that this function call only when i move my finger a little bit.
this is the code i am using :
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:#selector(doRewind)];
[uiNextButton addGestureRecognizer:longPress];

Answer 1

I know I am late to answer this question, but I think this might help someone.
I was having the same problem. I needed to fire the event and move to the next screen without moving or touching up my screen. As the gesture recognizer has different states:
UIGestureRecognizerStateBegan and UIGestureRecognizerStateEnded
I was using UIGestureRecognizerStateEnded and that was creating the problem, because it first checks if the state has begun and the event was not firing without moving my finger.
So I replaced my UIGestureRecognizerStateEnded state with
UIGestureRecognizerStateBegan and everything worked fine.
Now you don't need to move your finger away. Just touch hold and everything work fine.
if (gesture.state == UIGestureRecognizerStateBegan) {
// Do your stuff
}
Thats the correct way, other ways like numberOfTapsRequired, allowableMovement are meant for different purposes.

Answer 2

Your UILongPressGestureRecognizer has been created with the bare minimum of configuration information. At a minimum you should look into setting these properties:
minimumPressDuration
allowableMovement
And in special cases you can also set:
numberOfTouchesRequired
numberOfTapsRequired
In your case I think you want to set the allowableMovement to 0, the default value is 10 (pixels). You can read more from the class reference I linked.

Answer 3

When adding the UILongPressGestureRecognizer, you also need to set the interval for which you want the user to hold. You can do this with the following line of code:
[longPress setMinimumPressDuration:2];