swift－自定义无限轮播图

一  前言

1.之前一直在用OC编程，最近才开始接触使用swift就发现使用OC越来越不习惯，感觉已经爱上了swift。

2.这个自定义轮播图只是对之前OC版本进行了翻译，欢迎指正。

3.我决定一步步适应swift编程，首先从翻译原来的代码开始。

好啦，马上附上文件记录

let SW = UIScreen.mainScreen().bounds.size.width

let SH = UIScreen.mainScreen().bounds.size.height

 import Foundation
 import UIKit

 class ZLScrollView: UIView ,UIScrollViewDelegate {

     var scrollview :UIScrollView!
     var pageControl :UIPageControl!
     var pageBgView :UIImageView!
     var pageCount :NSInteger!

     var imageArray :NSArray!

     var leftImage :UIImageView!
     var centerImage :UIImageView!
     var rightImage :UIImageView!

     var timer :NSTimer!
     var isAutoMove :Bool!

     var urlsArray :NSArray!

     var selfHeight :CGFloat!

     override init(frame: CGRect) {

         super.init(frame: frame)

         self.frame=frame

         selfHeight=frame.size.height

         pageCount=

         createScrollView()
     }

     func initWithImage(array images : NSArray, array urls : NSArray ) {

         urlsArray=urls

         if images.count== {
             return
         }
         imageArray=NSArray.init(array: images)

         if imageArray.count== {
             pageBgView.hidden=true
             pageControl.hidden=true

             let image = imageArray[].allValues[]

             print(image.image)

             centerImage.image = getImage(imageView: (imageArray.lastObject?.allValues[])! as! UIImageView)
             scrollview.scrollEnabled=false
         }else if imageArray.count>= {
             pageBgView.hidden=false
             pageControl.hidden=false
             leftImage.image = getImage(imageView: (imageArray.lastObject?.allValues[])! as! UIImageView)
             centerImage.image = getImage(imageView: (imageArray[].allValues[]) as! UIImageView)
             rightImage.image = getImage(imageView: (imageArray[].allValues[]) as! UIImageView)
             scrollview.scrollEnabled=true
             pageBgView.bounds=CGRectMake(, , CGFloat(imageArray.count)*/375.0*SW, /375.0*SW)
             setTimer()
         }
         pageControl.numberOfPages = imageArray.count
     }

     func getImage(imageView imageView:UIImageView) -> UIImage {

         if imageView.image==nil {
             return UIImage(named: "tpjz")!
         }else{
             return imageView.image!
         }
     }

     func pauseTimer() {

         if (timer != nil) {
             if timer!.valid {
                 timer!.invalidate()
             }
         }
     }

     func getLoadImage(urlArray :NSArray, headScroll :ZLScrollView) {
         let imageArr = NSMutableArray()

         for i in ...urlArray.count- {

             let cachedImage = SDImageCache.sharedImageCache().imageFromDiskCacheForKey(urlArray[i] as! String)

             let imageView = UIImageView(frame: CGRectMake(, , SW, self.frame.height))

             if (cachedImage != nil) {
                 imageView.image=cachedImage
             }
             else{
                 imageView.sd_setImageWithURL(NSURL(string :String(urlArray[i])))
             }

             let imageDic = [ String(urlArray[i]) : imageView ]

             imageArr.addObject(imageDic)

             initWithImage(array: imageArr, array: urlArray)
         }

     }

     func resumeTimer() {
         if (timer != nil) {
             if timer!.valid {
                 timer!.invalidate()
             }
         }
     }

     func setTimer() {
         if timer==nil {
             timer = NSTimer.scheduledTimerWithTimeInterval(, target: self, selector: #selector(ZLScrollView.scrorllViewWithTimerAction), userInfo: nil, repeats: true)
         }
     }

     func scrorllViewWithTimerAction() {
         scrollview.contentOffset = CGPointMake(*SW, )
         isAutoMove = true
         self.performSelector(#selector(ZLScrollView.scrollViewDidEndDecelerating), withObject: scrollview, afterDelay: )
     }

     func createScrollView() {

         scrollview=UIScrollView()
         scrollview.frame=self.bounds
         scrollview.showsVerticalScrollIndicator = false
         scrollview.showsHorizontalScrollIndicator = false
         scrollview.delegate = self
         scrollview.pagingEnabled = true
         self.addSubview(scrollview)
         scrollview.contentSize = CGSizeMake(SW*, selfHeight)
         scrollview.setContentOffset(CGPointMake(SW, ), animated: false)

         pageBgView=UIImageView()
         pageControl=UIPageControl()
         pageControl.frame=CGRectMake(SW/, self.frame.height-/375.0*SW, SW/, /375.0*SW)
         pageBgView.center=CGPointMake(SW/, self.frame.height-9.5/375.0*SW)
         pageBgView.bounds=CGRectMake(, , /375.0*SW, /375.0*SW)
         pageBgView.image=UIImage(named: "icon_bg_tu")?.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)
         self.addSubview(pageBgView)
         pageControl.pageIndicatorTintColor=UIColor.whiteColor()
         pageControl.currentPageIndicatorTintColor=UIColor.orangeColor()
         pageControl.backgroundColor=UIColor.clearColor()
         pageControl.alpha=0.5
         self.addSubview(pageControl)

         leftImage=UIImageView(frame:CGRectMake(, , SW, selfHeight))
         centerImage=UIImageView(frame:CGRectMake(SW, , SW, selfHeight))
         centerImage.backgroundColor=UIColor.redColor()
         rightImage=UIImageView(frame:CGRectMake(SW*, , SW, selfHeight))
         scrollview.addSubview(leftImage)
         scrollview.addSubview(centerImage)
         scrollview.addSubview(rightImage)

         let tapGesture = UITapGestureRecognizer(target: self, action: #selector(ZLScrollView.imageViewTapGestureAction))
         scrollview.addGestureRecognizer(tapGesture)
     }

     typealias SelectImageBlcok = Int -> Void
     var selectImageBlcok : SelectImageBlcok!

     func imageViewTapGestureAction() {
         let dic = imageArray[pageCount]

         for i in ...urlsArray.count- {
             let str = urlsArray[i]

             if String(str)==String(dic.allKeys[]) {

                 self.selectImageBlcok(i)
             }

         }
     }

     func scrollViewDidEndDecelerating(scrollView: UIScrollView) {

         if scrollview.contentOffset.x > SW {
             pageCount=(pageCount+)%imageArray.count
         }else if scrollview.contentOffset.x < SW {
             pageCount=(pageCount-+imageArray.count)%imageArray.count
         }
         pageControl.currentPage = pageCount

         leftImage.image=getImage(imageView: (imageArray[(pageCount-+imageArray.count)%imageArray.count]).allValues[] as! UIImageView)
         centerImage.image=getImage(imageView: (imageArray[(pageCount+imageArray.count)%imageArray.count]).allValues[] as! UIImageView)
         rightImage.image=getImage(imageView: (imageArray[(pageCount++imageArray.count)%imageArray.count]).allValues[] as! UIImageView)
         if isAutoMove==nil {
             timer.fireDate.dateByAddingTimeInterval()
         }
         isAutoMove=false
     }

     required init?(coder aDecoder: NSCoder) {
         fatalError("init(coder:) has not been implemented")
     }

 }