swift3.0 图片放大缩小动画效果
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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
- 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
- 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
- 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)
- 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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