iOS 开发商品详情页中的banner中点击查看图片
本文出自code4app，原文地址：http://www.code4app.com/blog-928210-1694.html 轮翻播放与查看是分开的，轮翻是是用 开源的SDCycleScrollView 这里是给出的是查看的： //// FullScreenShowImageView.swift// joopic//// Created by jianxiong li on 16/9/27.// Copyright © 2016年 joobot. All rights reserved.//import Foundation import UIKit//图片轮播组件代理协议protocol FullScreenShowImageViewDelegate{ //获取数据源 func galleryDataSource()->[String] //获取内部scrollerView的宽高尺寸 func galleryScrollerViewSize()->CGSize func hiddenForCliked(index:Int) }//图片轮播组件控制器class FullScreenShowImageView: UIView,UIScrollViewDelegate{ //代理对象 var delegate : FullScreenShowImageViewDelegate! //屏幕宽度 let kScreenWidth = BWidth //当前展示的图片索引 var currentIndex : Int = 0 //数据源 var dataSource : [String]? //用于轮播的左中右三个image（不管几张图片都是这三个imageView交替使用） var leftImageView , middleImageView , rightImageView : UIImageView? //放置imageView的滚动视图 var scrollerView : UIScrollView? //scrollView的宽和高 var scrollerViewWidth : CGFloat? var scrollerViewHeight : CGFloat? //页控制器（小圆点） var pageControl : UIPageControl? //加载指示符（用来当iamgeView还没将图片显示出来时，显示的图片） var placeholderImage:UIImage! //自动滚动计时器 var autoScrollTimer:NSTimer? init(frame: CGRect,delegate:FullScreenShowImageViewDelegate) { super.init(frame: frame) self.delegate = delegate praperaUI() } required init?(coder aDecoder: NSCoder) { fatalError("init(coder:) has not been implemented") } func praperaUI() { //获取并设置scrollerView尺寸 let size : CGSize = self.delegate.galleryScrollerViewSize() self.scrollerViewWidth = size.width self.scrollerViewHeight = size.height //获取数据 self.dataSource = self.delegate.galleryDataSource() //设置scrollerView self.configureScrollerView() //设置加载指示图片 self.configurePlaceholder() //设置imageView self.configureImageView() //设置页控制器 self.configurePageController() //设置自动滚动计时器 //self.configureAutoScrollTimer() self.backgroundColor = UIColor.blackColor() self.addTapAction() } func addTapAction(){ //添加组件的点击事件 let tap = UITapGestureRecognizer(target: self, action: #selector(FullScreenShowImageView.handleTapAction(_:))) self.addGestureRecognizer(tap) } //点击事件响应 func handleTapAction(tap:UITapGestureRecognizer)->Void{ //获取图片索引值 self.delegate.hiddenForCliked(self.currentIndex) self.dismissViewAnimate() } func presentViewAnimate() { let fr = self.middleImageView?.frame self.middleImageView?.frame = CGRect(x: fr!.origin.x, y: 22, width: fr!.width, height: fr!.height) UIView.animateWithDuration(10, animations: { self.middleImageView?.frame = fr! }) { (_) in } } func dismissViewAnimate() { let fr = self.middleImageView?.frame self.middleImageView?.frame = CGRect(x: fr!.origin.x, y: fr!.origin.y - StatusAndNavHeight, width: fr!.width, height: fr!.height) UIView.animateWithDuration(10, animations: { self.middleImageView?.frame = CGRect(x: fr!.origin.x , y: -42, width: fr!.width, height: fr!.height) }) { (_) in self.hidden = true self.middleImageView?.frame = fr! } } //设置scrollerView func configureScrollerView(){ self.scrollerView = UIScrollView(frame: CGRect(x: 0,y: 0, width: self.scrollerViewWidth!, height: BHeight)) self.scrollerView?.backgroundColor = UIColor.blackColor() self.scrollerView?.delegate = self self.scrollerView?.contentSize = CGSize(width: self.scrollerViewWidth! * 3, height: BHeight) //滚动视图内容区域向左偏移一个view的宽度 self.scrollerView?.contentOffset = CGPoint(x: self.scrollerViewWidth!, y: 0) self.scrollerView?.pagingEnabled = true self.scrollerView?.bounces = false self.addSubview(self.scrollerView!) } //设置加载指示图片 func configurePlaceholder(){ //这里我使用ImageHelper将文字转换成图片，作为加载指示符 let font = UIFont.systemFontOfSize(17)// UIFont.systemFont(ofSize: 17.0, weight: UIFontWeightMedium) let size = CGSize(width: self.scrollerViewWidth!, height: self.scrollerViewHeight!) placeholderImage = UIImage(named: "图片加载中...") } //设置imageView func configureImageView(){ self.leftImageView = UIImageView(frame: CGRect(x: 0, y: (BHeight-scrollerViewHeight!)/2, width: self.scrollerViewWidth!, height: self.scrollerViewHeight!)) self.middleImageView = UIImageView(frame: CGRect(x: self.scrollerViewWidth!, y: (BHeight-scrollerViewHeight!)/2, width: self.scrollerViewWidth!, height: self.scrollerViewHeight! )); self.rightImageView = UIImageView(frame: CGRect(x: 2*self.scrollerViewWidth!, y: (BHeight-scrollerViewHeight!)/2, width: self.scrollerViewWidth!, height: self.scrollerViewHeight!)); self.scrollerView?.showsHorizontalScrollIndicator = false self.leftImageView?.contentMode = UIViewContentMode.ScaleAspectFit self.middleImageView?.contentMode = UIViewContentMode.ScaleAspectFit self.rightImageView?.contentMode = UIViewContentMode.ScaleAspectFit //设置初始时左中右三个imageView的图片（分别时数据源中最后一张，第一张，第二张图片） if(self.dataSource?.count != 0){ resetImageViewSource() } self.scrollerView?.addSubview(self.leftImageView!) self.scrollerView?.addSubview(self.middleImageView!) self.scrollerView?.addSubview(self.rightImageView!) } //设置页控制器 func configurePageController() { self.pageControl = UIPageControl(frame: CGRect(x: kScreenWidth/2-60, y: BHeight - 30, width: 120, height: 20)) self.pageControl?.numberOfPages = (self.dataSource?.count)! self.pageControl?.userInteractionEnabled = false self.addSubview(self.pageControl!) } //设置自动滚动计时器 func configureAutoScrollTimer() { //设置一个定时器，每三秒钟滚动一次 autoScrollTimer = NSTimer.scheduledTimerWithTimeInterval(3, target: self, selector: #selector(SliderGalleryController.letItScroll), userInfo: nil, repeats: true) } //计时器时间一到，滚动一张图片 func letItScroll(){ let offset = CGPoint(x: 2*scrollerViewWidth!, y: 0) self.scrollerView?.setContentOffset(offset, animated: true) } //每当滚动后重新设置各个imageView的图片 func resetImageViewSource() { //当前显示的是第一张图片 if self.currentIndex == 0 { self.leftImageView?.sd_setImageWithURL(NSURL(string: self.dataSource!.last!)) self.middleImageView?.sd_setImageWithURL(NSURL(string: self.dataSource!.first!)) let rightImageIndex = (self.dataSource?.count)!>1 ? 1 : 0 //保护 self.rightImageView?.sd_setImageWithURL(NSURL(string: self.dataSource![rightImageIndex])) } //当前显示的是最后一张图片 else if self.currentIndex == (self.dataSource?.count)! - 1 { self.leftImageView?.sd_setImageWithURL(NSURL(string:self.dataSource![self.currentIndex-1])) self.middleImageView?.sd_setImageWithURL(NSURL(string: self.dataSource!.last!)) self.rightImageView?.sd_setImageWithURL(NSURL(string: self.dataSource!.first!)) } //其他情况 else{ self.leftImageView?.sd_setImageWithURL(NSURL(string:self.dataSource![self.currentIndex-1])) self.middleImageView?.sd_setImageWithURL(NSURL(string: self.dataSource![self.currentIndex])) self.rightImageView?.sd_setImageWithURL(NSURL(string: self.dataSource![self.currentIndex+1])) } //设置页控制器当前页码 self.pageControl?.currentPage = self.currentIndex } //scrollView滚动完毕后触发 func scrollViewDidScroll(scrollView: UIScrollView) { //获取当前偏移量 let offset = scrollView.contentOffset.x if(self.dataSource?.count != 0){ //如果向左滑动（显示下一张） if(offset >= self.scrollerViewWidth!*2){ //还原偏移量 scrollView.contentOffset = CGPoint(x: self.scrollerViewWidth!, y: 0) //视图索引+1 self.currentIndex = self.currentIndex + 1 if self.currentIndex == self.dataSource?.count { self.currentIndex = 0 } } //如果向右滑动（显示上一张） if(offset <= 0){ //还原偏移量 scrollView.contentOffset = CGPoint(x: self.scrollerViewWidth!, y: 0) //视图索引-1 self.currentIndex = self.currentIndex - 1 if self.currentIndex == -1 { self.currentIndex = (self.dataSource?.count)! - 1 } } //重新设置各个imageView的图片 resetImageViewSource() } } //手动拖拽滚动开始 func scrollViewWillBeginDragging(scrollView: UIScrollView) { //使自动滚动计时器失效（防止用户手动移动图片的时候这边也在自动滚动） //autoScrollTimer?.invalidate() } //手动拖拽滚动结束 func scrollViewDidEndDragging(scrollView: UIScrollView, willDecelerate decelerate: Bool) { //重新启动自动滚动计时器 //configureAutoScrollTimer() } } 如何使用： var sliderGallery : FullScreenShowImageView! var bannerCurrentIndex:Int = 0 //图片轮播组件协议方法：获取内部scrollView尺寸 func galleryScrollerViewSize() -> CGSize { return CGSize(width: BWidth, height: BHeight/2) } //图片轮播组件协议方法：获取数据集合 func galleryDataSource() -> [String] { return self.bannerView.imageURLStringsGroup as! [String] } //点击事件响应 func hiddenForCliked(index:Int){ if(bannerCurrentIndex != index){ self.bannerView.scrollToIndex(Int32(index)) } self.navigationController?.setNavigationBarHidden(false, animated: false) } func showImageGallery(index:Int){ //初始化图片轮播组件 if(sliderGallery == nil){ sliderGallery = FullScreenShowImageView(frame: CGRect(x: 0, y: 0, width: BWidth, height: BHeight),delegate:self) sliderGallery.currentIndex = index sliderGallery.resetImageViewSource() //将图片轮播组件添加到当前视图 self.view.addSubview(sliderGallery) }else{ sliderGallery.currentIndex = index sliderGallery.resetImageViewSource() sliderGallery.hidden = false } self.sliderGallery.presentViewAnimate() self.navigationController?.setNavigationBarHidden(true, animated: false) } //pragma -- SDCycleScrollViewDelegate func cycleScrollView(cycleScrollView: SDCycleScrollView!, didSelectItemAtIndex index: Int) { print("--------index:(index)") bannerCurrentIndex = index self.showImageGallery(index) }
