一. 内容说明
跟我之前这篇类似，只不过那篇是oc版本，这篇是swift版本 oc版本链接地址
目的：通过kingfisher请求5张图片，展示出来。然后利用图片放大缩小管理类展示图片，多张图片可以滑动浏览
效果图如下，想看动态的效果图，请看上面链接中的oc版本效果图，跟这篇是一样的。
本demo，只加载本地图片的demo下载链接 ，需要加载网络图片的，需要下载kingfisher
二.源码展示
0. 图片测试demo源码
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import foundation import uikit class ljphotogroupviewcontroller : tfbaseviewcontroller{ lazy var ljarray : [ljphotoinfo] = [ljphotoinfo]() let ljurlarray = ["http://pica.nipic.com/2007-12-12/20071212235955316_2.jpg", "http://d.lanrentuku.com/down/png/1706/10avatars-material-pngs/avatars-material-man-4.png", "http://image.nationalgeographic.com.cn/2017/0703/20170703042329843.jpg", "http://image.nationalgeographic.com.cn/2015/0121/20150121033625957.jpg", "http://image.nationalgeographic.com.cn/2017/0702/20170702124619643.jpg"] override func viewdidload() { super.viewdidload() self.settopnavbartitle("图片浏览测试demo") self.settopnavbackbutton() self.setui() } } extension ljphotogroupviewcontroller{ func setui(){ for index in 0...4{ //1.加载本地图片 //let image = uiimage.init(named: "\(index + 1).jpg") let showimageview = uiimageview.init() //showimageview.image = image showimageview.tag = index showimageview.frame = cgrect(x: int((appwidth - 200)/2.0), y: 80 + int(90 * index), width: 200, height: 80) showimageview.isuserinteractionenabled = true view.addsubview(showimageview) //2.加载本地图片 let url = url(string:ljurlarray[index]) showimageview.kf.setimage(with: url) let gestrue = uitapgesturerecognizer.init(target: self, action: #selector(ljphotogroupviewcontroller.showclicked(_:))) showimageview.addgesturerecognizer(gestrue) //需要浏览的图片添加到数组 let info = ljphotoinfo.init() info.largeimageurlstr = ljurlarray[index] info.thumbimageview = showimageview info.currentselectindex = index self.ljarray.append(info) } } } extension ljphotogroupviewcontroller{ func showclicked(_ sender : uitapgesturerecognizer){ if self.ljarray.count > 0 { let index = sender.view?.tag let photogroupview = ljphotogroupview.init(frame: cgrect(x: 0, y: 0, width: appwidth, height: appheight)) photogroupview.setdata(self.ljarray, selectedindex: index!) photogroupview.showphotoview() chdebuglog("-------\(string(describing: index))") } } } |
1. ljphotogroupview：图片浏览管理类，用于展示图片
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import foundation import uikit class ljphotogroupview: uiview { let baseindex = 1000 var originframe : cgrect? // 图片的源尺寸 var currentindex : nsinteger = 0 //当前选中的图片index var ljphotoarray : [any] = [any]()//存储多组需要加载的图片原始信息 lazy var ljscrollview : uiscrollview = { let view = uiscrollview.init(frame: cgrect(x: 0, y: 0, width: appwidth, height: appheight)) view.delegate = self view.ispagingenabled = true view.backgroundcolor = uicolor.yellow return view }() override init(frame: cgrect) { super.init(frame: frame) self.addsubview(self.ljscrollview) } func setdata(_ photoarray : array<any>, selectedindex : nsinteger) { self.ljscrollview.contentsize = cgsize(width: floor(appwidth) * cgfloat(photoarray.count), height: appheight) self.currentindex = selectedindex self.ljphotoarray = photoarray } required init?(coder adecoder: nscoder) { fatalerror("init(coder:) has not been implemented") } } extension ljphotogroupview { // mark: -- 图片cell复用 func dequeuereusablecell() -> ljphotoview { var cell = self.viewwithtag(baseindex + self.currentindex) as? ljphotoview if ljphotoarray.count > currentindex { let info = ljphotoarray[currentindex] as? ljphotoinfo let tempimageview = info?.thumbimageview if cell != nil{ self.originframe = tempimageview?.convert((tempimageview?.bounds)!, to: self) return cell! } cell = ljphotoview.init(frame: cgrect(x: floor(appwidth)*cgfloat(currentindex), y: 0, width: appwidth, height: appheight)) self.originframe = tempimageview?.convert((tempimageview?.bounds)!, to: self) } return cell! } // mark: -- 展示图片 func showphotoview(){ uiapplication.shared.keywindow?.rootviewcontroller?.view.addsubview(self) self.backgroundcolor = uicolor.black let cell1 = self.dequeuereusablecell() cell1.tag = self.baseindex + self.currentindex var ljtempimage : uiimage? if ljphotoarray.count > currentindex { let info = ljphotoarray[currentindex] as? ljphotoinfo ljtempimage = info?.thumbimageview?.image } ljtempimage = (ljtempimage != nil) ? ljtempimage : uiimage.init(named: "pic_broadcast_gray_square") let tfimageview = uiimageview.init(image: ljtempimage) tfimageview.frame = self.originframe ?? cgrect.zero tfimageview.clipstobounds = true tfimageview.backgroundcolor = uicolor.red tfimageview.contentmode = .scaleaspectfit self.addsubview(tfimageview) //添加页面消失的手势 let tap = uitapgesturerecognizer.init(target: self, action: #selector(hideimageview)) self.addgesturerecognizer(tap) uiview.animate(withduration: 0.25, animations: { let y : cgfloat? = (appheight - (ljtempimage?.size.height)! * appwidth / (ljtempimage?.size.width)!)/2.0 let height : cgfloat? = (ljtempimage?.size.height)! * appwidth / (ljtempimage?.size.width)! tfimageview.frame = cgrect(x: 0, y: y!, width: appwidth, height: height!) }) { (finish) in //根据选中第几张图片直接展示出来 let cell = self.dequeuereusablecell() cell.tag = self.baseindex + self.currentindex cell.backgroundcolor = uicolor.gray if self.ljphotoarray.count > self.currentindex{ cell.setcurrentimageview(self.ljphotoarray[self.currentindex] as! ljphotoinfo) } let x : cgfloat = cgfloat(self.currentindex) * floor(appwidth); self.ljscrollview.setcontentoffset(cgpoint.init(x: x, y: 0), animated: false) self.ljscrollview.addsubview(cell) tfimageview.removefromsuperview() } } // mark: -- 移除图片 func hideimageview(){ let cell = self.viewwithtag(baseindex + currentindex) as? ljphotoview uiview.animate(withduration: 0.25, animations: { cell?.ljimageview.frame = self.originframe! }) { (finish) in self.backgroundcolor = uicolor.white self.removefromsuperview() } } } extension ljphotogroupview : uiscrollviewdelegate{ func scrollviewdidscroll(_ scrollview: uiscrollview) { //滑动时，会调用多次 } func scrollviewdidenddecelerating(_ scrollview: uiscrollview) { //滑动完毕时，只会调用一次 let page = self.ljscrollview.contentoffset.x / self.frame.size.width; self.currentindex = nsinteger(page); print("scrollviewdidenddecelerating当前页数----\(page)") let cell = self.dequeuereusablecell() cell.tag = self.baseindex + int(page) if self.ljphotoarray.count > self.currentindex{ cell.setcurrentimageview(self.ljphotoarray[self.currentindex] as! ljphotoinfo) } self.ljscrollview.addsubview(cell) } } |
2. ljphotoinfo：图片信息的model
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import foundation import uikit class ljphotoinfo: nsobject { var currentselectindex : int? var largeimageurlstr : string? var thumbimageview : uiimageview? override init() { super.init() } } |
3.ljphotoview：图片浏览管理类用到的cell（图片显示）
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import foundation import uikit class ljphotoview: uiscrollview { var ljinfo : ljphotoinfo? lazy var ljimageview : uiimageview = { let view = uiimageview() view.clipstobounds = true view.contentmode = .scaleaspectfit return view }() override init(frame: cgrect) { super.init(frame: frame) self.zoomscale = 1.0 self.addsubview(self.ljimageview) } required init?(coder adecoder: nscoder) { fatalerror("init(coder:) has not been implemented") } } extension ljphotoview{ func setcurrentimageview(_ info : ljphotoinfo){ self.ljinfo = info if self.ljinfo?.thumbimageview?.image == nil{ self.ljinfo?.thumbimageview?.image = uiimage.init(named: "pic_broadcast_gray_square") } //无url，则通过thumbimageview获取image展示 //self.ljimageview.image = info.thumbimageview.image; let y : cgfloat? = (appheight - (info.thumbimageview?.image?.size.height)! * appwidth / (info.thumbimageview?.image?.size.width)!) * 0.5; self.ljimageview.frame = cgrect(x: 0, y: y!, width: appwidth, height: appwidth*(info.thumbimageview?.image?.size.height)!/(info.thumbimageview?.image?.size.width)!) self.ljimageview.image = self.ljinfo?.thumbimageview?.image if info.largeimageurlstr != "" { let url = url(string:info.largeimageurlstr!) self.ljimageview.kf.setimage(with: url) } } } |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：http://blog.csdn.net/robinson_911/article/details/77979467
