swift 广告轮播图_app

概述import UIKitimport Kingfisherclass BannerView: UIView,UIScrollViewDelegate{ enum ImageType{ case Image //本地图片 case URL //URL } //图片水平放置到scr

import UIKitimport Kingfisherclass BannerVIEw: UIVIEw,uiscrollviewdelegate{        enum ImageType{        case Image     //本地图片        case URL       //URL    }        //图片水平放置到scrollVIEw上    private var scrollVIEw:UIScrollVIEw = UIScrollVIEw()    //小圆点标识    private var pageControl:UIPageControl = UIPageControl()    private var center_image:UIImageVIEw = UIImageVIEw()    private var first_image:UIImageVIEw = UIImageVIEw()    private var second_image:UIImageVIEw = UIImageVIEw()    //图片集合    private var images:Array<String> = []    private var type:ImageType = .Image        private var wIDth:CGfloat = 0    private var height:CGfloat = 0        private var currIndex = 0    private var clickBlock :(Int)->VoID = {index in}        private var timer:Timer?        // 默认自动播放 设置为false只能手动滑动    var isauto = true    // 轮播间隔时间 默认4秒可以自己修改    var interval:Double = 4        overrIDe func layoutSubvIEws() {        super.layoutSubvIEws()//        self.initLayout()    }        public func setimages(images:Array<String>,type:ImageType = .Image,imageClickBlock:@escaPing (Int) -> VoID) {        self.type = type        self.images = images        self.clickBlock = imageClickBlock        self.initLayout()    }        private func initLayout(){        if(self.images.count == 0){            return        }                wIDth = frame.size.wIDth        height = frame.size.height                scrollVIEw.frame = self.bounds        scrollVIEw.contentSize = CGSize(wIDth:wIDth * CGfloat(3),height:height)        scrollVIEw.contentOffset = CGPoint(x:wIDth,y:0)        scrollVIEw.isUserInteractionEnabled = true        scrollVIEw.isPagingEnabled = true        scrollVIEw.showsHorizontalScrollindicator = false        scrollVIEw.delegate = self        addSubvIEw(scrollVIEw)                first_image.frame = CGRect(x:0,y:0,wIDth:wIDth,height:height)        first_image.contentMode = .scaleAspectFill        first_image.isUserInteractionEnabled = true        scrollVIEw.addSubvIEw(first_image)                center_image.frame = CGRect(x:wIDth,height:height)        center_image.contentMode = .scaleAspectFill        center_image.isUserInteractionEnabled = true        scrollVIEw.addSubvIEw(center_image)                second_image.frame = CGRect(x:wIDth * 2.0,height:height)        second_image.contentMode = .scaleAspectFill        second_image.isUserInteractionEnabled = true        scrollVIEw.addSubvIEw(second_image)                        pageControl.center = CGPoint(x:wIDth/2,y:height - CGfloat(15))        pageControl.isEnabled = true        pageControl.numberOfPages = images.count        pageControl.currentPageIndicatorTintcolor = UIcolor.green        pageControl.pageIndicatorTintcolor = UIcolor.gray        pageControl.isUserInteractionEnabled = false        addSubvIEw(pageControl)                //当前显示的只有 center_image 其他两个只是用来增加滑动时效果而已，不需要添加点击事件        addTapGesWithImage(image: center_image)        if(isauto){            openTimer()        }        setCurrent(currIndex: 0)    }        func setCurrent(currIndex:Int) {        self.currIndex = currIndex                if(type == .Image){            center_image.image = UIImage.init(named:images[currIndex])            first_image.image = UIImage.init(named:images[(currIndex - 1 + images.count) % images.count])            second_image.image = UIImage.init(named:images[(currIndex + 1) % images.count])        }else{            center_image.setMyImage(URL: NSURL(string: images[currIndex]))            first_image.setMyImage(URL: NSURL(string: images[(currIndex - 1 + images.count) % images.count]))            second_image.setMyImage(URL: NSURL(string: images[(currIndex + 1) % images.count]))        }        center_image.tag = currIndex        pageControl.currentPage = currIndex        scrollVIEw.setContentOffset(CGPoint(x:wIDth,y:0),animated: false)    }        //给图片添加点击手势    private func addTapGesWithImage(image:UIImageVIEw) {        let tap = UITapGestureRecognizer(target: self,action: #selector(tap(_:)))        image.isUserInteractionEnabled = true //让控件可以触发交互事件        image.contentMode = .scaleAspectFill        image.clipsToBounds = true //超出父控件的部分不显示        image.addGestureRecognizer(tap)    }        //点击图片，调用block    @objc func tap(_ ges:UITapGestureRecognizer) {        clickBlock((ges.vIEw?.tag)!)    }        func scrollVIEwDIDScroll(_ scrollVIEw: UIScrollVIEw) {            }        func scrollVIEwWillBeginDragging(_ scrollVIEw: UIScrollVIEw) {        closeTimer()    }        func scrollVIEwDIDEndDragging(_ scrollVIEw: UIScrollVIEw,willDecelerate decelerate: Bool) {        openTimer()    }        func scrollVIEwDIDEndDecelerating(_ scrollVIEw: UIScrollVIEw) {        if(scrollVIEw.contentOffset.x > 0){            currIndex = (currIndex + 1) % images.count        }else{            currIndex = (currIndex - 1 + images.count) % images.count        }        setCurrent(currIndex: currIndex)    }        func openTimer(){        if(isauto){            timer = Timer.scheduledTimer(timeInterval: interval,target: self,selector: #selector(startautoScroll),userInfo: nil,repeats: true)        }    }        func closeTimer(){        if(timer != nil){            timer?.invalIDate()            timer = nil        }    }            @objc func startautoScroll(){        if(isdisplayInScreen()){            setCurrent(currIndex: (currIndex + 1) % images.count)        }    }        func isdisplayInScreen() -> Bool{        if(self.window == nil){            return false        }        return true    }    }extension UIImageVIEw{    // Kingfisher的覆盖  好处：1.不用所有界面都去导入 2.如果KingfisherAPI更新或者更换图片加载库可以更方便一些，保持方法名和第一个参数不变，修改一下就能达到目的，比如修改为使用SDWebImage    public func setMyImage(URL: NSURL?,placeholderImage: Image? = nil,optionsInfo: KingfisherOptionsInfo? = nil,progressBlock: DownloadProgressBlock? = nil,completionHandler: CompletionHandler? = nil){        kf.setimage(with: URL as? Resource,placeholder: placeholderImage,options: optionsInfo,progressBlock: progressBlock,completionHandler: completionHandler)    }}