版本：swift 3.0
思路：将imageArr 前后 添加 imagearr.last 和 imageArr[0] 滑动时能给人循环的假象，设置定时器，调用更换图片方法，通过偏移量，判断是第几张图片，最后设置当手动翻页时调用的方法 scrollViewDidEndDecelerating（）在此方法中判断 偏移量 如果是第一张图 更改偏移量到第二个，如果是最后一张图，让偏移量变成第一个，这样就能无限轮播~ 喵~

import UIKit
class HTAdvertisingView: UIView,UIScrollViewDelegate{

typealias Closure = (Any)->Void
let pageControl = UIPageControl()
var timer = Timer()
var currentPage = NSInteger()
var mineImageIndex:NSInteger = 2
//let goBackClosure:Closure!
var imageArr = [UIImage]()
let mineImageView = UIImageView()
let leftImageView = UIImageView()
let rightImageView = UIImageView()
init(images:Array<Any>,frame:CGRect,auto:Bool){

     super.init(frame: frame)
     self.frame = frame
     var substituteArray = images
     if auto {
     substituteArray.insert(images.last ?? UIImage(), at: 0)
     substituteArray.append(images[0])
    }
     self.imageArr = substituteArray as! [UIImage]
     self.configScrollView(isTimer:auto)
}

required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
}


//MARK: -代理方法
func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {

    self.stopTimer()

}

func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
 
    let page = self.viewWithTag(110)as? UIPageControl
    if page != nil{
        let width = scrollView.frame.size.width
        let point:CGPoint = scrollView.contentOffset
        if point.x == 0  {
            scrollView.contentOffset = CGPoint.init(x: width * CGFloat(self.imageArr.count - 2), y: 0)
        }
        if point.x == width * CGFloat(self.imageArr.count-1) {
            scrollView.contentOffset = CGPoint.init(x: width , y: 0)
        }
    currentPage = NSInteger(scrollView.contentOffset.x / width)
    page?.currentPage = currentPage - 1
    self.startTimer()
    }
}

//MARK：-绘制ScrollView
func configScrollView(isTimer:Bool){

    let width = self.frame.size.width
    let heigth   = self.frame.size.height
    
    let scrollView = UIScrollView()
    scrollView.frame = self.bounds
    scrollView.tag = 100
    scrollView.backgroundColor = UIColor.gray
    for i in 0..<self.imageArr.count{
    
        let imageView = UIImageView()
        imageView.frame = CGRect.init(x:CGFloat(i) * width, y: 0, width: width, height: heigth)
        imageView.image = self.imageArr[i]
        imageView.backgroundColor = UIColor.red
        imageView.isUserInteractionEnabled = true
        scrollView.addSubview(imageView)
    }

    scrollView.contentSize = CGSize.init(width: CGFloat( self.imageArr.count) * width, height: heigth)
    let x = isTimer ? width : 0
    scrollView.contentOffset = CGPoint.init(x:x, y: 0)
    scrollView.bounces = false
    scrollView.delegate = self
    scrollView.isPagingEnabled = true
    scrollView.showsHorizontalScrollIndicator = false
    self.addSubview(scrollView)
    if isTimer {
    self.startTimer()
    self.addPageControl()
  
    }
    
}


//MARK: -添加PageController
func addPageControl(){
    let x = self.frame.size.width/2
    let y = self.frame.size.height - 30
    self.pageControl.frame = CGRect.init(x: x, y: y, width: x, height: 30)
    self.pageControl.numberOfPages = self.imageArr.count - 2
    self.pageControl.pageIndicatorTintColor = UIColor.black
    self.pageControl.currentPageIndicatorTintColor = UIColor.white
    self.currentPage = 1
    self.pageControl.currentPage = self.currentPage-1
    self.pageControl.tag = 110
    self.addSubview(pageControl)
  
}
//MARK: -定时器回调方法
func nextImage(){

    let scrollView:UIScrollView = self.viewWithTag(100) as! UIScrollView
    
    if currentPage == self.imageArr.count - 2 {
        
        self.currentPage = 1
        
    }else{
       
        self.currentPage += 1
    }
    let width = scrollView.frame.size.width
    scrollView.contentOffset = CGPoint.init(x: CGFloat(currentPage)*width, y: 0)
    self.currentPage = NSInteger(scrollView.contentOffset.x)/NSInteger(width)
    self.pageControl.currentPage = currentPage - 1
}

//MARK: -定时器开关
func startTimer(){

    self.timer = Timer.scheduledTimer(timeInterval: 3, target: self, selector:#selector(nextImage), userInfo: nil, repeats: true)

}
func stopTimer(){

    self.timer.invalidate()

}


//MARK: -作者
/**
 *  清凉 －［HT］
 */

}