Getting the UIButton that was double-tapped from UIGestureRecognizer's action method

Question

I wrote a fairly long action method connected to several UIButtons, and now I've realised I would like to have something different happen if I tap one of the buttons twice. So I am setting up two gesture recognizers:

UITapGestureRecognizer *tapOnce = [[UITapGestureRecognizer alloc] initWithTarget:self  action:@selector(tapOnce:)];
UITapGestureRecognizer *tapTwice = [[UITapGestureRecognizer alloc] initWithTarget:self  action:@selector(tapTwice:)];


tapOnce.numberOfTapsRequired = 1;
tapTwice.numberOfTapsRequired = 2;

[tapOnce requireGestureRecognizerToFail:tapTwice];

[self.mybutton addGestureRecognizer:tapOnce];
[self.mybutton addGestureRecognizer:tapTwice];

then, I implement the methods:

- (void)tapOnce:(UIGestureRecognizer *)gesture{
   //Do what you were already doing
}


- (void)tapTwice:(UIGestureRecognizer *)gesture{ 
  // Some new functionality
}

Now, I don't have a problem with the new functionality. Where I get stuck is trying to get the tapOnce: method to do what my button was already doing. I need to know which button was tapped, so I can't use this:

[myButton sendActionsForControlEvents: UIControlEventTouchUpInside];

I also tried the old:

for (button in myArrayOfButtons){
    [button sendActionsForControlEvents: UIControlEventTouchUpInside];
}

No luck either.

Then I went the way of actually creating a separate method for the implementation of my button, so what was:

- (IBAction)buttonPressed:(id)sender {

   //my functionality...
}

became:

- (IBAction)buttonPressed:(id)sender {

    [self myMethodwithSender:sender];
}

-(void)myMethodwithSender: (id)sender{

    // my functionality
 }

So that worked in itself, but when I try to put the tap once and twice into play I get stuck. I tried putting my new method in the method for tap once:

- (void)tapOnce:(UIGestureRecognizer *)gesture{

       [self myMethodwithSender:sender];
}

but of course there is no sender in this method so it doesn't work (right?)

Then I tried changing this:

UITapGestureRecognizer *tapOnce = [[UITapGestureRecognizer alloc] initWithTarget:self  action:@selector(tapOnce:)];

to this:

UITapGestureRecognizer *tapOnce = [[UITapGestureRecognizer alloc] initWithTarget:self  action:@selector(myMethodwithSender:)];

Which doesn't work either. So I am not sure how to do this. Any suggestions welcome.

Answer 1

With:

- (void)tapOnce:(UIGestureRecognizer *)gesture{
   [self myMethodwithSender:sender];
}

If myMethodWithSender doesn't use sender, you can send nil. If it needs it to be the button, gesture.view should be that button (if you attached the recognizer to the button)