import Poi

@IBOutlet weak var poiView: PoiView!
// Change View's class to PoiView in Attributes inspector.

import Poi

let poiView = PoiView()
self.view.addSubView(poiView)

class ViewController: UIViewController, PoiViewDataSource, PoiViewDelegate {

poiView.dataSource = self
poiView.delegate = self

func numberOfCards(_ poi: PoiView) -> Int

func poi(_ poi: PoiView, viewForCardAt index: Int) -> UIView

func poi(_ poi: PoiView, viewForCardOverlayFor direction: SwipeDirection) -> UIImageView? {
    switch direction {
    case .right:
        return UIImageView(image: #imageLiteral(resourceName: "good"))
    case .left:
        return UIImageView(image: #imageLiteral(resourceName: "bad"))
    }
}

func poi(_ poi: PoiView, didSwipeCardAt: Int, in direction: SwipeDirection)

func poi(_ poi: PoiView, runOutOfCardAt: Int, in direction: SwipeDirection)

func swipeCurrentCard(to direction: SwipeDirection)

func undo()

import UIKit
import Poi

class ViewController: UIViewController, PoiViewDataSource, PoiViewDelegate {

    @IBOutlet weak var poiView: PoiView!

    var sampleCards = [UIView]()

    override func viewDidLoad() {
        super.viewDidLoad()
        var colors = [UIColor.red, UIColor.orange]
        for i in (0..<2) {
            sampleCards.append(UIView(frame: CGRect(x: 0, y: 0, width: 240, height: 128)))
            sampleCards[i].backgroundColor = colors[i]
        }
        poiView.dataSource = self
        poiView.delegate = self
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

    // MARK: PoiViewDataSource
    func numberOfCards(_ poi: PoiView) -> Int {
        return 2
    }

    func poi(_ poi: PoiView, viewForCardAt index: Int) -> UIView {
        return sampleCards[index]
    }

    func poi(_ poi: PoiView, viewForCardOverlayFor direction: SwipeDirection) -> UIImageView? {
        switch direction {
        case .right:
            return UIImageView(image: #imageLiteral(resourceName: "good"))
        case .left:
            return UIImageView(image: #imageLiteral(resourceName: "bad"))
        }
    }

    // MARK: PoiViewDelegate
    func poi(_ poi: PoiView, didSwipeCardAt: Int, in direction: SwipeDirection) {
        switch direction {
        case .left:
            print("left")
        case .right:
            print("right")
        }
    }

    func poi(_ poi: PoiView, runOutOfCardAt: Int, in direction: SwipeDirection) {
        print("last")
    }

    // MARK: IBAction
    @IBAction func OKAction(_ sender: UIButton) {
        poiView.swipeCurrentCard(to: .right)
    }

    @IBAction func undo(_ sender: UIButton) {
        poiView.undo()
    }
}