Xcode iOS push down button and drag then up on a second button

Question

Lets say I wan\'t to add 1 to an integer. This will only be done when I push down on a UIButton and then release my finger on another UIButton.

Answer 1

 //Initalize a BOOL variable to know if you started the touch in the right place.
 BOOL correctStart = NO;

 //Get the location of the first touch, if its in the first button make correctStart = YES.
 -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
      NSSet *allTouches = [event allTouches];
           for (UITouch *touch in allTouches) {
                if ([touch locationInView:button1.view]) {
                     correctStart = YES;
                }
           }
 }

 -(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
      NSSet *allTouches = [event allTouches];
           for (UITouch *touch in allTouches) {
                if (([touch locationInView:button2.view]) && (correctStart == YES)) {
                     anInteger++;
                }
           }
      correctStart = NO;
 }

I did not try this code as I am not at my mac, so your results may vary, but this should get you going in the right direction.