swift 3 --- 轮播+定时器 （下篇文章将实现无限轮播）

直接复制代码可用

import UIKit

typealias TapImageViewBlock = (_ tag:Int) ->Void

class BannerView: UIView,UIScrollViewDelegate {
var Tapdeletage:TapImageViewBlock?

//定义全局变量
var scrollerView : UIScrollView! = nil
var pageControl : UIPageControl! = nil
var timer : Timer! = nil
var imageView :UIImageView! = nil
let width = UIScreen.main.bounds.size.width
let height = UIScreen.main.bounds.size.height
var imageCount = 0



 init(frame: CGRect, ImagesArr:[String]) {
    super.init(frame: frame)
    imageCount = ImagesArr.count
    
    self.scrollerView = UIScrollView.init(frame: CGRect(x: 0, y: 0, width: width, height: frame.size.height))
    self.addSubview(self.scrollerView)
    
    self.pageControl = UIPageControl.init(frame: .init(x: (frame.size.width - 100)/2, y:  frame.size.height - 20, width: 100, height: 20))
    self.addSubview(self.pageControl)
    
    
    let imageViewW = self.scrollerView.bounds.size.width
    let imageViewH = self.scrollerView.bounds.size.height
    
    for i in 0 ..< ImagesArr.count  {
         self.imageView = UIImageView.init()
        let TapGesture = UITapGestureRecognizer.init(target: self, action: #selector(imageViewTap(tap:)))
        self.imageView.isUserInteractionEnabled = true
        self.imageView.tag = i + 1
        self.imageView.addGestureRecognizer(TapGesture)
        
        let imageViewX = Int(imageViewW) * i;
        self.imageView.frame = .init(x: CGFloat(imageViewX), y: 0, width: imageViewW, height: imageViewH)
        
        // 3.设置图片
        // 拼接图片的名称
        self.imageView.image = UIImage(named: ImagesArr[i])
        self.scrollerView.addSubview(self.imageView)

    }
    
    self.scrollerView.contentSize = CGSize(width: Int(imageViewW) * ImagesArr.count, height: 0)
    self.scrollerView.showsHorizontalScrollIndicator = false
    self.scrollerView.showsVerticalScrollIndicator = false
    self.scrollerView.isPagingEnabled = true
    self.pageControl.numberOfPages = ImagesArr.count
    self.pageControl.currentPage = 0;
    self.pageControl.pageIndicatorTintColor = UIColor.purple
    self.pageControl.currentPageIndicatorTintColor = UIColor.orange
    self.scrollerView.delegate = self;
    self.scrollerView.bounces = false
    
    self.timerAction()
    
}

func timerAction() -> Void {
    if (timer == nil) {
        timer = Timer.scheduledTimer(timeInterval: 1.0, target: self, selector: #selector(nextPageAction), userInfo: nil, repeats: true)
        RunLoop.current.add(timer, forMode: .commonModes)
    }
 }
func nextPageAction(){
    
    var page = self.pageControl.currentPage;
    if (page == (self.imageCount - 1)){
        page = 0;
    } else {
        page += 1;
    }
    let offset = CGPoint(x: width * CGFloat(page), y: 0)
    self.scrollerView.setContentOffset(offset, animated: true)
}

func imageViewTap(tap:UITapGestureRecognizer) -> Void {
    
    NSLog("=============\(tap.view?.tag)")
    
          self.Tapdeletage!((tap.view?.tag)!)

}

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


}


extension BannerView{

func scrollViewDidScroll(_ scrollView: UIScrollView) {
    let scrollViewW = scrollView.bounds.size.width;
    let page = (scrollView.contentOffset.x + scrollViewW * 0.5) / scrollViewW;
    self.pageControl.currentPage = Int(page)
}

func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {
         if self.timer != nil{
        self.timer.invalidate()
        self.timer = nil
    
    }
}

func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
    self.timerAction()
}


}

使用方法

 let banner = BannerView.init(frame: .init(x: 0, y: 0, width: self.view.bounds.size.width, height: 300), ImagesArr: ["img_01","img_02","img_03","img_04","img_05"])
    banner.Tapdeletage = { tag in
    print("---------\(tag)")
    
    }