Question

I’m setting up a LPGR like so and I was wonder if I can create a tag in each LPGR. I need to do this so I know which of all my buttons is being pressed…

UILongPressGestureRecognizer *longpressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressHandler:)];
longpressGesture.minimumPressDuration = 2;
[longpressGesture setDelegate:self];
[pushButton addGestureRecognizer:longpressGesture];

And my method below…

- (void)longPressHandler:(UILongPressGestureRecognizer *)gestureRecognizer {
NSLog(@"longPressHandler");
}

I know you can’t pass arguments via selectors, so I was wondering if I could assign a tag to the LPGR or if in the method I could grab the tag of the button that was using the LPGR? Is any of this possible>?

EDIT:

NSInteger *tag = [gestureRecognizer.view.tag];
NSLog(@"%@ longPressHandler",tag);

Answer 1

UIGestureRecognizer has a property view which is the view the gesture recognizer is attached to.

Therefore, in your handler method, gestureRecognizer.view is the button that the LPGR is attached to and gestureRecognizer.view.tag is the button’s tag.

ADDED:
Sample code:

- (void)longPressHandler:(UILongPressGestureRecognizer *)gestureRecognizer {
    NSLog(@"longPressHandler");
    NSInteger tag = gestureRecognizer.view.tag;
    NSLog(@"%d longPressHandler",tag);
}