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

Swift 3 Solution

extension UIControl {

    open override func point(inside point: CGPoint, with event: UIEvent?) -> Bool {
        let inside = super.point(inside: point, with: event)
        if inside != isHighlighted && event?.type == .touches {
            isHighlighted = inside
        }
        return inside
    }
}