MMRun

ViewController.swift

//
//  ViewController.swift
//  MMRun
//
//  Created by travis on 2016-03-28.
//  Copyright © 2016 C4. All rights reserved.
//

import UIKit

class ViewController: UIViewController {
    var run: UIImageView!
    var stop: UIImageView!
    var stoppedRight: UIImage!
    var stoppedLeft: UIImage!
    var runRight: UIImage!
    var runLeft: UIImage!

    override func viewDidLoad() {
        super.viewDidLoad()

        addGesture()
        generateStoppedImages()
        generateRunImages()
        createImageViews()
    }

    func createImageViews() {
        run = UIImageView(image: runRight)
        stop = UIImageView(image: stoppedRight)

        run.center = view.center
        stop.center = view.center

        view.addSubview(run)
        view.addSubview(stop)

        run.hidden = true
    }

    func generateStoppedImages() {
        stoppedRight = UIImage(named: "mm_00" )!
        stoppedLeft = UIImage(CGImage: stoppedRight.CGImage!, scale: stoppedRight.scale, orientation: .UpMirrored)
    }

    func generateRunImages() {
        var runImages = [
            UIImage(named: "mm_01")!,
            UIImage(named: "mm_02")!,
            UIImage(named: "mm_03")!
        ]
        runRight = UIImage.animatedImageWithImages(runImages, duration: 0.33)

        for i in 0..<runImages.count {
            let currentImage = runImages[i]
            let mirroredImage = UIImage(CGImage: currentImage.CGImage!, scale: currentImage.scale, orientation: .UpMirrored)
            runImages[i] = mirroredImage
        }
        runLeft = UIImage.animatedImageWithImages(runImages, duration: 0.33)
    }

    func addGesture() {
        let lp = UILongPressGestureRecognizer(target: self, action: #selector(ViewController.handleLongPress(_:)))
        lp.minimumPressDuration = 0.0
        view.addGestureRecognizer(lp)
    }

    func handleLongPress(lp: UILongPressGestureRecognizer) {
        let location = lp.locationInView(view)

        switch lp.state {
        case .Began:
            stop.hidden = true
            run.hidden = false
            switchDirection(location.x > view.center.x)
            run.startAnimating()
        case .Cancelled, .Ended, .Failed:
            stop.hidden = false
            run.hidden = true
            run.stopAnimating()
        default:
            break
        }
    }

    func switchDirection(right: Bool) {
        if right {
            run.image = runRight
            stop.image = stoppedRight
        } else {
            run.image = runLeft
            stop.image = stoppedLeft
        }
    }
}