改寫 UIImage ，定期播放 Image

1. 為讓 image 定期播放，新增 2 個按鈕 



2. 新增按鈕 Stop 與程式的連結



3. 同樣，新增按牛 Start 與程式的連結，連結後程式



4. 把所有影像都包裝起來



5. 設定將動態顯示的影像，以及下一張影像出現前等待的秒數



6. 寫啟動 Start 與停止 Stop 按鈕的程式



7. 完整程式

//
//  ViewController.swift
//  ImageViewDemo
//
//  Created by Elvis Meng on 2015/10/17.
//  Copyright © 2015年 Elvis Meng. All rights reserved.
//

import UIKit

class ViewController: UIViewController {
    
    var arrayNames = ["人間失格","改變成真","Steve Jobs"]
    var arrayImages:Array = []
    var imageIndex = 0
    var count = 0
    
    @IBOutlet weak var ImageNow: UIImageView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        ImageNow.image = UIImage(named: "人間失格")
        count = arrayNames.count
        for var i = 0; i < count ; i++ {
            arrayImages.append(UIImage(named: arrayNames[i])!)
        }
        
        ImageNow.animationImages = arrayImages
        ImageNow.animationDuration = 12 // 2 seconds
        
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    @IBAction func startClick(sender: UIButton) {
        ImageNow.startAnimating()
    }
    
    @IBAction func stopClick(sender: UIButton) {
        ImageNow.stopAnimating()
    }
    
    @IBAction func prevClick(sender: UIButton) {
        
        if  --imageIndex < 0 {
            imageIndex = count - 1
        }
        //ImageNow.image = UIImage(named: arrayNames[imageIndex])
        ImageNow.image = arrayImages[imageIndex]
    }

    @IBAction func nextClick(sender: UIButton) {
        
        if ++imageIndex == count {
            imageIndex = 0
        }
        //ImageNow.image = UIImage(named: arrayNames[imageIndex])
        ImageNow.image = arrayImages[imageIndex]
    }
}


8. 測試