     // MARK: Private Variables
     private var tabSectionScrollView: UIScrollView!
     private var contentSectionScrollView: UIScrollView!
+    private var arrowView: ArrowView!
+    
     private var cachedPageTabs: [Int: UIView] = [:]
     private var cachedPageContents: CacheQueue<Int, UIView> = CacheQueue()
     private var realCachePageLimit: Int {

        }
        
        // set custom attrs
        self.tabSectionScrollView.backgroundColor = self.tabSectionBackgroundColor
        self.contentSectionScrollView.backgroundColor = self.contentSectionBackgroundColor
        
        // first time setup pages
        self.setupPages()
        
        // async necessarily
        dispatch_async(dispatch_get_main_queue()) {

    }
    
}

class ArrowView : UIView {
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        self.backgroundColor = UIColor.clearColor()
    }
    
    var rect: CGRect!
    var arrorBackgroundColor: UIColor?
    
    var midX: CGFloat { return CGRectGetMidX(rect) }
    var midY: CGFloat { return CGRectGetMidY(rect) }
    var maxX: CGFloat { return CGRectGetMaxX(rect) }
    var maxY: CGFloat { return CGRectGetMaxY(rect) }
    
    override func drawRect(rect: CGRect) {
        self.rect = rect
        
        let ctx = UIGraphicsGetCurrentContext()
        
        CGContextBeginPath(ctx)
        CGContextMoveToPoint(ctx, 0, 0)
        CGContextAddQuadCurveToPoint(ctx, maxX * 0.12, 0, maxX * 0.2, maxY * 0.2)
        CGContextAddLineToPoint(ctx, midX - maxX * 0.05, maxY * 0.9)
        CGContextAddQuadCurveToPoint(ctx, midX, maxY, midX + maxX * 0.05, maxY * 0.9)
        CGContextAddLineToPoint(ctx, maxX * 0.8, maxY * 0.2)
        CGContextAddQuadCurveToPoint(ctx, maxX * 0.88, 0, maxX, 0)
        CGContextClosePath(ctx)
        
        CGContextSetFillColorWithColor(ctx, arrorBackgroundColor?.CGColor)
        CGContextFillPath(ctx);
    }
    
}
