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))") }
}
}

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) }
}

import Foundation import UIKit class LJPhotoInfo: NSObject {
var currentSelectIndex : Int? var largeImageURLStr : String? var thumbImageview : UIImageView? override init() {
super.init() }
}

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) }
}
}