Find and Remove Certain one UIGestureRecognizer among some same named UIGestureRecognizers - iphone

Question

Hey, guys, I met a problem when trying to removeGestureRecognizer: from a view,
what i want to do is doubleTap one of the imageViews, and remove the tapped imageView's singleTap Gesture, without remove other imageViews singleTap Gesture.
here is how i generate views, gestures and the mechanisms:
.h
UITapGestureRecognizer *singleTap;
.m
- (void)viewDidLoad
{
[super viewDidLoad];
NSInteger i;
for (i = 1; i <= 3; i++)
{
UIImageView *imageView = [[UIImageView alloc] init];
imageView.frame = CGRectMake(110, 70+80*(i-1), 100, 60);
imageView.backgroundColor = [UIColor whiteColor];
imageView.tag = i;
imageView.userInteractionEnabled = YES;
[self.view addSubview:imageView];
UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(doubleMethod:)];
doubleTap.numberOfTapsRequired = 2;
singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(singleMethod:)];
[singleTap requireGestureRecognizerToFail:doubleTap];
[imageView addGestureRecognizer:doubleTap];
[imageView addGestureRecognizer:singleTap];
}
}
- (void)singleMethod: (id)sender
{
NSLog(#"SingleTap");
}
- (void)doubleMethod: (id)sender
{
NSLog(#"%d",[((UITapGestureRecognizer *)sender).view.gestureRecognizers count]);
UIImageView *imageView = nil;
NSArray *tryToFindYou = [self.view subviews];
for (imageView in tryToFindYou)
{
if ([imageView isKindOfClass:[UIImageView class]] && imageView.tag == ((UITapGestureRecognizer *)sender).view.tag)
{
[imageView removeGestureRecognizer:singleTap];
}
}
NSLog(#"%d",[((UITapGestureRecognizer *)sender).view.gestureRecognizers count]);
}
but these lines I wrote can't find exactly the singleTap Gesture attached to the double-tapped imageView.
when NSLog the .gestureRecognizers count, it still 2, what it removed is the last imageView's singleTap Gesture, it became 1, which is correct.
I can't locate the first and second one, any ideas to locate them? thank you for reading :)

Answer 1

You should cycle through gestureRecognizers property of the UIView class, where the gestures are added, something like this:
for (imageView in tryToFindYou)
{
if ([imageView isKindOfClass:[UIImageView class]] && imageView.tag == ((UITapGestureRecognizer *)sender).view.tag)
{
for(UIGestureRecognizer *gesture in [imageView gestureRecognizers])
{
if([gesture isKindOfClass:[UITapGestureRecognizer class]])
{
if (gesture.numberOfTapsRequired == 1)
[imageView removeGestureRecognizer:gesture];
}
}
}
}