如何使用swift在ios中制作图像slideShow，它只显示一个图像？

Question

import UIKit

class PageViewController: UIViewController {

    @IBOutlet weak var myScrView: UIScrollView!
    @IBOutlet weak var pagectr: UIPageControl!
    @IBOutlet weak var imageView: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()

        myScrView.tag = 1
        myScrView.autoresizingMask = UIViewAutoresizing.None
        self.view.addSubview(myScrView)
        self.setupScrollView(myScrView)

        pagectr.tag = 12
        pagectr.numberOfPages = 9
        pagectr.autoresizingMask = UIViewAutoresizing.None
        self.view.addSubview(pagectr)
    }

    func setupScrollView(scrMain:UIScrollView) -> Void {
        var imgesArray : NSMutableArray = []
        for position in 1...9 {
            var strImage : String = "\(position).jpeg"
            var imges = UIImage(named: strImage)
            imgesArray.addObject(imges!)

            imageView.contentMode = UIViewContentMode.ScaleToFill
            imageView.image = imges
            imageView.tag = position+1
            scrMain.addSubview(imageView)
            println(imageView)
        }

        scrMain.contentSize = CGSizeMake(scrMain.frame.size.width*10, scrMain.frame.size.height)
        NSTimer.scheduledTimerWithTimeInterval(2, target: self, selector: "scrollingTimer", userInfo:nil, repeats: true)
    }

    func scrollingTimer(){

        let scrMain: UIScrollView = self.view.viewWithTag(1) as UIScrollView
        let pgctr: UIPageControl = self.view.viewWithTag(12) as UIPageControl
        let contentOffset  = scrMain.contentOffset.x as CGFloat
        var nextPage = (CGFloat)(contentOffset/scrMain.frame.size.width) + 1
        if(nextPage != 9){
            scrMain.scrollRectToVisible(CGRectMake(nextPage*scrMain.frame.size.width, 0, scrMain.frame.size.width, scrMain.frame.size.height), animated: true)
            pgctr.currentPage = Int(nextPage)
        }
        else{
            scrMain.scrollRectToVisible(CGRectMake(0, 0, scrMain.frame.size.width, scrMain.frame.size.height), animated: true)
            pgctr.currentPage = 1
        }
    }
}

我想在ios中使用swift制作一个图片幻灯片应用程序请帮助我只显示一个图像。我得到一个空白的屏幕，几乎就像动画没有跟上，然后我等了一会儿再次滑动图像视图加速到位并再次正常工作。知道我做错了什么吗？在使用动态数量的图像（这里是硬编码的）实现像这样的图像轮播时，最佳做法是什么？