UIButton fails to properly register touch in bottom region of iPhone screen

Question

I have an app with many different buttons arranged in a calculator like, square / rectangular format. It is actually extremely similar to the default iOS calculator. There a

Answer 1

The cause for this issue is that Apple seems to place a GestureRecognizer at the bottom of the screen that delays touches in any other view. After fiddling around with gesture recognizers on the App's windows I came up with a solution that incorporates a subclass of UIButton:

- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event
{
    BOOL inside = [super pointInside: point withEvent: event];

    if (inside && !self.isHighlighted && event.type == UIEventTypeTouches)
    {
        self.highlighted = YES;
    }

    return inside;
}

The given method is getting called although touchesBegan: is called delayed. A check if the view is at the bottom of the screen may be suitable to prevent any side effects that may occur with this fix.