Custom UISlider - Increase “hot spot” size

Question

I have a custom UISlider that is relatively tough for big fingered people to grab hold of and slide due to the size of the \"thumb image\". Is there any way to increase the

Answer 1

This solution works with iOS 8:

class ExtUISlider: UISlider {

    var thumbTouchSize : CGSize = CGSizeMake(50, 50)

    override func pointInside(point: CGPoint, withEvent event: UIEvent?) -> Bool {
        let bounds = CGRectInset(self.bounds, -thumbTouchSize.width, -thumbTouchSize.height);
        return CGRectContainsPoint(bounds, point);
    }

    override func beginTrackingWithTouch(touch: UITouch, withEvent event: UIEvent) -> Bool {
        let thumbPercent = (value - minimumValue) / (maximumValue - minimumValue)
        let thumbSize = thumbImageForState(UIControlState.Normal)!.size.height
        let thumbPos = CGFloat(thumbSize) + (CGFloat(thumbPercent) * (CGFloat(bounds.size.width) - (2 * CGFloat(thumbSize))))
        let touchPoint = touch.locationInView(self)

        return (touchPoint.x >= (thumbPos - thumbTouchSize.width) &&
            touchPoint.x <= (thumbPos + thumbTouchSize.width))
    }
}

Credits go to this post: http://www.mpatric.com/2009-04-15-more-responsive-sliders-on-the-iphone