Manual touch handling across multiple buttons

SomeUIView.m

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
  [super touchesBegan:touches withEvent:event];

  UIView *button = [self viewForTouches:touches event:event];
  [self setHighlightedView:button];

}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
  [super touchesMoved:touches withEvent:event];

  UIView *button = [self viewForTouches:touches event:event];
  [self setHighlightedView:button];
}

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
  [super touchesCancelled:touches withEvent:event];

  [self setHighlightedView:nil];
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
  [super touchesEnded:touches withEvent:event];
  
  UIView *button = [self viewForTouches:touches event:event];
  [self handleTouchUpForButton:button];
  [self setHighlightedView:nil];
}

- (void)handleTouchUpForButton:(UIView*)sender {
  // handle touch for sender
}

- (void)setHighlightedView:(UIView *)highlightedView {
  // highlight currently pressed button (highlightedView)
}

- (UIView*)viewForTouches:(NSSet*)touches event:(UIEvent*)event {
  CGPoint location = [[touches anyObject] locationInView:self];

  // find view
  UIView *view = nil;
  for (UIView *button in self.allButtons) {
    CGRect rect = [self convertRect:button.frame fromView:button.superview];
    if (CGRectContainsPoint(rect, location)) {
      view = button;
      break;
    }
  }

  return view;
}