swift3.0实现图片放大缩小动画效果

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://www.easck.com/2007-12-12/20071212235955316_2.jpg", 
           "http://www.easck.com/down/png/1706/10avatars-material-pngs/avatars-material-man-4.png", 
           "http://www.easck.com/2017/0703/20170703042329843.jpg", 
           "http://www.easck.com/2015/0121/20150121033625957.jpg", 
           "http://www.easck.com/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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