swift使用SDPhotoBriwser浏览图片教程

场景：我们在使用app的时候，特别是显示多张图片的时候，都会点击图片并进行浏览，比如QQ、微信，好友发表的动态，我们都会点击进去查看原图。现在很多app都支持图片浏览功能，这样更加方便用户体验，那么我们在项目开发过程中，怎么对图片点击进行预览，下面介绍一下在swift项目开发中使用SDPhotoBrowser进行图片浏览。

SDPhotoBrowser地址：https://github.com/gsdios/SDPhotoBrowser

下面直接代码进行说明

//
//  ShopStoreTableHeaderView.swift
//  SmartMilk
//
//  Created by lin jiang on 2017/7/11.
//  Copyright  2017年 greengao. All rights reserved.
// 
import UIKit 
//添加SDPhotoBrowserDelegate代理
class ShopStoreTableHeaderView: UIView,UIScrollViewDelegate,SDPhotoBrowserDelegate { 
  var storeImages:NSMutableArray = NSMutableArray()
  var mainScrollView:UIScrollView?
  var mainPageControl:UIPageControl?
  var mainTimer:Timer?    
  var isMiddleShow:Bool = false       
  override init(frame: CGRect) {
      super.init(frame: frame)        
      setScrollViewUI()
      setPageControlUI()
  }    
  required init?(coder aDecoder: NSCoder) {
      fatalError("init(coder:) has not been implemented")
  }    
  func setScrollViewUI(){
      self.mainScrollView = UIScrollView(frame: CGRect(x: 0, y: 0, width: self.width, height: self.height))        
      // 添加到父视图
      self.addSubview(self.mainScrollView!)        
      // 背景颜色
      //        arc4random()
      self.mainScrollView?.backgroundColor = UIColor.white                
      // 自适应父视图
      // self.mainScrollView.autoresizingMask = UIViewAutoresizing.FlexibleHeight
      // 其他属性
      self.mainScrollView?.isScrollEnabled = true // 上下滚动
      self.mainScrollView?.scrollsToTop = true // 点击状态栏时，可以滚动回顶端
      self.mainScrollView?.bounces = true // 在最顶端或最底端时，仍然可以滚动，且释放后有动画返回效果
      mainScrollView?.isPagingEnabled = true // 分页显示效果
      mainScrollView?.showsHorizontalScrollIndicator = false // 显示水平滚动条
      mainScrollView?.showsVerticalScrollIndicator = true // 显示垂直滚动条
      mainScrollView?.indicatorStyle = UIScrollViewIndicatorStyle.white // 滑动条的样式
      // 设置内容大小
      // self.mainScrollView?.contentSize = CGSize(width: originX, height: scrollViewHeight)                
      // 代理
      self.mainScrollView?.delegate = self
  }    
  func setPageControlUI(){
      self.mainPageControl = UIPageControl(frame: CGRect(x: (self.width - 150.0) / 2, y: ((self.mainScrollView?.bounds)!.height - 20.0 - 10.0), width: 150.0, height: 20.0))        
      // 添加到父视图
      self.addSubview(self.mainPageControl!)
      // 背景颜色
      self.mainPageControl?.backgroundColor = UIColor.clear        
      // 其他属性设置
      self.mainPageControl?.numberOfPages = 0 // 总页数
      self.mainPageControl?.currentPage = 0 // 当前页数，默认为0，即第一个，实际数量是0~n-1
      self.mainPageControl?.pageIndicatorTintColor = UIColor.lightGray // 非当前页颜色
      self.mainPageControl?.currentPageIndicatorTintColor = UIColor.red // 当前页颜色 
  }    
  func setMainScrollViewPageControl(images:[StoreImageModel]) {
      self.storeImages.removeAllObjects()
      self.storeImages.addObjects(from: images)
      for view  in (self.mainScrollView?.subviews)! {
          view.removeFromSuperview()
      }
      var originX:CGFloat = 0.0
      for model in images
      {
          let imageView = UIImageView(frame: CGRect(x:originX, y:0.0, width:SCREEN_WIDTH, height:self.height))
          let url = URL(string: model.storeSmallImg!)
          let image = UIImage(named: "default_icon")
          // weak var weakSelf = self
          imageView.sd_setImage(with: url, placeholderImage: image, options: .retryFailed, completed: { (image, error, cacheType, URL) in
          })
          //添加UI Image View的点击事情
          let tap = UITapGestureRecognizer(target: self, action: #selector(onClickedImageEvent(gest:)))
          imageView.isUserInteractionEnabled = true            
          imageView.addGestureRecognizer(tap)            
          //主要是显示区分显示大点的图和小点的图
          if isMiddleShow == true{                
              let contentView = UIView(frame: CGRect(x:originX, y:0.0, width:self.width, height:self.height))
              let imagexx = (SCREEN_WIDTH - self.height)/2                
              imageView.frame = CGRect(x:imagexx, y:0.0, width:self.height, height:self.height)                
              contentView.addSubview(imageView)
              self.mainScrollView?.addSubview(contentView)
              originX = (contentView.frame.minX + contentView.frame.width)
          }
          else
          {
              self.mainScrollView?.addSubview(imageView)                
              originX = (imageView.frame.minX + imageView.frame.width)
          }
      }
      self.mainScrollView?.contentSize = CGSize(width: originX, height: self.height)        
      self.mainPageControl?.numberOfPages = images.count // 总页数
      self.mainPageControl?.currentPage = 0 // 当前页数，默认为0，即第一个，实际数量是0~n-1        
  }    
  func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
      MQLog(message:"6 scrollViewDidEndDecelerating")        
      let width = scrollView.frame.width
      let offsetX = scrollView.contentOffset.x
      let index = offsetX / width
      MQLog(message:"当前页是：\(index)")        
      self.mainPageControl?.currentPage = Int(index)
  }    
  func addTimer()
  {
      self.mainTimer = Timer.scheduledTimer(timeInterval: 2.0, target: self, selector: #selector(autoShow), userInfo: nil, repeats: true)
  }    
  func removerTimer()
  {
      if self.mainTimer != nil
      {
          self.mainTimer?.invalidate()
          self.mainTimer = nil
      }
  }
  func autoShow()
  {
      var page:Int = (self.mainPageControl?.currentPage)!
      let total = (self.mainPageControl?.numberOfPages)! - 1
      if total == page
      {
          page = 0
      }
      else
      {
          page += 1
      }
      
      // 设置偏移量
      let offsetX = CGFloat(page) * (self.mainScrollView?.frame)!.width
      self.mainScrollView?.setContentOffset(CGPoint(x:offsetX, y:0.0), animated: true)
      self.mainPageControl?.currentPage = page
  }
  func onClickedImageEvent(gest:UITapGestureRecognizer) {        
      let browser = SDPhotoBrowser()        
      //显示图片UIImageView的父控件
      browser.sourceImagesContainerView =  self.mainScrollView        
      //显示图片的总数量
      browser.imageCount = self.storeImages.count        
      if self.storeImages.count > (self.mainPageControl?.currentPage)! {
          browser.currentImageIndex = (self.mainPageControl?.currentPage)!
      }
      else
      {
          //要显示的当前图片下标位置
          browser.currentImageIndex = 0
      }
      
      browser.delegate = self
      browser.show()
  }    
  /**************************************************************/
  //返回当前UIImageView显示的图片
  func photoBrowser(_ browser: SDPhotoBrowser!, placeholderImageFor index: Int) -> UIImage! {
      if self.isMiddleShow{
          let contentView = self.mainScrollView?.subviews[index]
          let imageView:UIImageView = contentView?.subviews[0]as! UIImageView
          return imageView.image
      }
      else
      {
          let imageView:UIImageView = self.mainScrollView?.subviews[index]as! UIImageView
          return imageView.image
      }
  }
  //设置要显示图片资源的地址
  func photoBrowser(_ browser: SDPhotoBrowser!, highQualityImageURLFor index: Int) -> URL! {
      let model = self.storeImages[index] as! StoreImageModel
      let url = URL(string: model.storeBigImg!)
      return url
  }
}

运行结果：以上图片资源的地址就不提供了，是公司的资源，百度随便找几张图片就可以了

swift使用SDPhotoBriwser浏览图片教程