BNOffsetClickThroughScrollView.swift

import UIKit

/**
    A specialized scroll view that allows clicking through a trailing section of it's content. This is used for a 
    transparent section at the end of the target rows that can be tapped through. It simply reports any points 
    within the last `clickThroughOffset` points of the view as not belonging to the view.
*/
private class BNOffsetClickThroughScrollView: UIScrollView {
    
    /**
        The number of points at the right side of the scroll view that do not belong to the view.
    */
    var clickThroughOffset: CGFloat = 44.0
    
    /**
        This is used by the framework to determine if a point is within the given view. In our override, we report
        points in the last `clickThroughOffset` of the view as not being inside the scroll view.
    */
    override func pointInside(point: CGPoint, withEvent event: UIEvent?) -> Bool {
        let hitPosition = contentOffset.x + point.x
        
        if super.pointInside(point, withEvent: event) && hitPosition < maxTappableX() {
            return true
        } else {
            return false
        }
    }
    
    /**
        Returns the maximum location that is within the view.
    */
    func maxTappableX() -> CGFloat {
        return contentSize.width - clickThroughOffset
    }
}