Pass touch to nearest UIButton?

Question

I am trying to create a view with multiple UIButtons where any tap would be registered as a tap on the nearest UIButton. I have been unsuccessful so far, and I am hoping you guys/gals have some knowledge on standard approaches/methods used to do what I am trying to do.

Answer 1

You could use the Touches Began method:

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
  {
      // Get the CGPoint of the touch:
      UITouch touch = [touches anyObject];
      CGPoint touchPoint = [touch locationInView:self.view];

      // Loop through an array containing your buttons and see if we tapped
      // one of these buttons, if so, do nothing and let the button handle the tap
      for (UIButton button in MyButtonsArray){
        if(CGRectContainsPoint(button.frame, touchPoint)) {
             return;
          } 
      }

     // if the loop completes without returning, you tapped something other than a button
     // so add code here that uses the mathematical distance formula to 
     // calculate which button is the closest to the tap point. 


  }

You have all the necessary "data" in terms of coordinates of the button and coordinates of the touch point to calculate the closest button to the touch point.