iPhone iOS how to add a UILongPressGestureRecognizer and UITapGestureRecognizer to the same control and prevent conflict?

Question

I\'m building an iPhone app that would let the user rearrange some of the UI elements on the screen.

How can I add a tap gesture recognizer and a long press gesture rec

Answer 1

To combine successfully both you need:

1º Add to interface gesture delegate at header

@interface ViewController : ViewController 

2º Create gesture events and add to a view into source file:

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(touch:)];
    [tap setNumberOfTapsRequired:1]; // Set your own number here
    [tap setDelegate:self]; // Add the  protocol

    UILongPressGestureRecognizer *longTap = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longTouch:)];
    [longTap setNumberOfTapsRequired:0]; // Set your own number here
    [longTap setMinimumPressDuration:1.0];
    [longTap setDelegate:self]; // Add the  protocol
    [tap requireGestureRecognizerToFail:longTap];   // Priority long

    [self.view addGestureRecognizer:tap];
    [self.view addGestureRecognizer:longTap];

3º Add callbacks in source file:

- (void) touch: (UITapGestureRecognizer *)recognizer
{
    CGPoint location = [recognizer locationInView: self.HUDview];
    if (recognizer.state == UIGestureRecognizerStateBegan)
    {
        NSLog(@"touch UIGestureRecognizerStateBegan");
    }
    if (recognizer.state == UIGestureRecognizerStateEnded)
    {
        NSLog(@"touch UIGestureRecognizerStateEnded");
        //NSLog(@"Position of touch: %.3f, %.3f", location.x, location.y);    // Position landscape
    }
}

- (void) longTouch: (UILongPressGestureRecognizer *)recognizer
{
    if (recognizer.state == UIGestureRecognizerStateBegan)
    {
        NSLog(@"longTouch UIGestureRecognizerStateBegan");
    }
    if (recognizer.state == UIGestureRecognizerStateEnded)
    {
        NSLog(@"longTouch UIGestureRecognizerStateEnded");
    }
}

4º Set gesture recognizer available:

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}