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))")
}
}
}
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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)
}
}
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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()
}
}
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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)
}
}
}
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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