Gestures.swift

    private(set) lazy var swipeDownGesture: UISwipeGestureRecognizer = {
        let swipeGesture = UISwipeGestureRecognizer(target: self, action: #selector(ViewController.handleSwipeGestures(_:)))
        swipeGesture.direction = .Down
        return swipeGesture
    }()
    private(set) lazy var swipeUpGesture: UISwipeGestureRecognizer = {
        let swipeGesture = UISwipeGestureRecognizer(target: self, action: #selector(ViewController.handleSwipeGestures(_:)))
        swipeGesture.direction = .Up
        return swipeGesture
    }()
    
    func handleSwipeGestures(sender : UISwipeGestureRecognizer) {
        setMainViewExpanded(sender.direction == .Down, animated: true)
    }
    
    func setMainViewExpanded(expanded: Bool, animated: Bool) {
        let topInset = pullDownTableView.contentInset.top
        let yOffset = expanded ? -topInset : -topOffset
        pullDownTableView.setContentOffset(CGPointMake(0, yOffset), animated: true)
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // Add gestures
        view.addGestureRecognizer(swipeUpGesture)
        view.addGestureRecognizer(swipeDownGesture)
        
        // Create and add the pull down table view
        self.view.addSubview(pullDownTableView)
        
        //Set background color to contrasting color
        view.backgroundColor = UIColor.darkGrayColor()
        pullDownTableView.backgroundColor = UIColor.clearColor()
        
    }