现在网上好的swift图片浏览器几乎没有,于是我就写了一个swift的图片浏览器,适配不同尺寸图片,支持image url 和 PHAssert.只依赖于SDWebImage这一个第三方框架,效果如下
图片浏览器.gif
图片浏览器有两个难点
- 从起始图片位置渐进转场动画到浏览器,浏览器返回消失到指定图片位置.
- 开始图片列表里的图片都是统一尺寸,但是大图显示都是按图片原始宽高等比例显示.渐变过程要稳定变化.
图片固定宽高显示模式,一般图片列表里用
固定尺寸显示.png
先看看图片常用的几种显示形式
图片显示.png
图片等比例缩放显示模式,一般图片列表里用,我用的图片有三种尺寸
按宽高等比例显示.png
两种尺寸图片.png
项目文件结构
屏幕快照 2017-04-14 17.31.59.png
我的浏览器的用法,在点击图片的方法里调用
//selectIndex: 当前点击的图片在所有图片中的顺序 从0开始, images: 放有url字符串的数组
let photoB = PhotoBrowser(selectIndex: backImageVi.tag - kbaseTag, images: imageArray)
//点击的那个imageView告诉浏览四
photoB.sourceImageView = imageViArray[backImageVi.tag - kbaseTag]
//传回当前浏览器图片索引
photoB.endPageIndexClosure = {[weak self] (index: Int) in
//你根据返回索引告诉浏览器动画返回到哪一个ImageView上
photoB.endImageView = self?.imageViArray[index]
}
self.present(photoB, animated: true, completion: nil)
下面我说一下这个浏览器的实现
我用UICollectionView实现,列表里面图片全是等宽高,多余的裁掉.
浏览器主控制器 PhotoBrowser
import UIKit
import Photos
let jdkresuId = "kJDPhotoBrowserId"
class JDPhotoBrowser: UIViewController {
var imageRectDict: [IndexPath: CGRect] = [IndexPath: CGRect]()
var isViewAppeared: Bool = false
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
isViewAppeared = true
}
enum imageSourceType {
case image
case url
case asserts
}
///图片的url字符串数组
var urls:[String]?
var images: [UIImage]?
var asserts: [PHAsset]?
//传回当前浏览器图片索引
var endPageIndexClosure: (( _ index: Int)->())?
var imageSourceTp: imageSourceType = .image
var deleteButtonClosure: (( _ index: Int)->())? //点击删除按钮时index
private lazy var indexLabel = UILabel()
var sourceImageView: UIImageView?{
didSet{
photoBrowserAnimator.sourceImageView = sourceImageView
photoBrowserAnimator.endImageView = sourceImageView
photoBrowserAnimator.superVc = self
}
} // 来源view
var endImageView: UIImageView?{
didSet{
photoBrowserAnimator.endImageView = endImageView
}
} // 消失时候imageview
var lastPage: Int = 0
///静止后选中照片的索引
var currentPage : Int?{
didSet{
if self.imageSourceTp == .image {
guard let kcount = images?.count else { return }
indexLabel.text = "\((currentPage ?? 0) + 1)/\(kcount)"
}else if self.imageSourceTp == .url{
guard let kcount = urls?.count else { return }
indexLabel.text = "\((currentPage ?? 0) + 1)/\(kcount)"
}else if self.imageSourceTp == .asserts{
guard let kcount = asserts?.count else { return }
indexLabel.text = "\((currentPage ?? 0) + 1)/\(kcount)"
}
}
}
//1 url
init(selectIndex: Int, urls: [String]) {
super.init(nibName: nil, bundle: nil)
self.currentPage = selectIndex
self.urls = urls
self.imageSourceTp = .url
self.modalPresentationStyle = .custom
self.transitioningDelegate = photoBrowserAnimator
}
//2 image 第一个0
init(selectIndex: Int, images: [UIImage]) {
super.init(nibName: nil, bundle: nil)
self.currentPage = selectIndex
self.images = images
self.imageSourceTp = .image
self.modalPresentationStyle = .custom
self.transitioningDelegate = photoBrowserAnimator
}
//3 相册
init(selectIndex: Int, asserts: [PHAsset]) {
super.init(nibName: nil, bundle: nil)
self.currentPage = selectIndex
self.asserts = asserts
self.imageSourceTp = .asserts
self.modalPresentationStyle = .custom
self.transitioningDelegate = photoBrowserAnimator
}
lazy var collectionView: UICollectionView = {
let layout = UICollectionViewFlowLayout()
layout.itemSize = CGSize(width: kJDScreenWidth , height: kJDScreenHeight )
layout.minimumInteritemSpacing = 0
layout.minimumLineSpacing = 0
layout.scrollDirection = .horizontal
let collectionView = UICollectionView(frame: CGRect(x: 0, y: 0, width: kJDScreenWidth, height: kJDScreenHeight ), collectionViewLayout: layout)
collectionView.register(JDPhotoBrowserCell.self, forCellWithReuseIdentifier: jdkresuId)
collectionView.delegate = self;
collectionView.dataSource = self;
collectionView.backgroundColor = UIColor.black
collectionView.isPagingEnabled = true
collectionView.showsHorizontalScrollIndicator = false
collectionView.alwaysBounceHorizontal = true
return collectionView
}()
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = UIColor.black
self.view.addSubview(collectionView)
let indexPath = IndexPath(item: (currentPage ?? 0), section: 0)
DispatchQueue.main.async {
if indexPath.row <= ((self.images?.count ?? 0) - 1) || indexPath.row <= ((self.urls?.count ?? 0) - 1) || indexPath.row <= ((self.asserts?.count ?? 0) - 1){
self.collectionView.scrollToItem(at: indexPath, at: .left, animated: false)
}
}
photoBrowserAnimator.currentPage = (currentPage ?? 0)
deleteBtn.frame = CGRect(x: kJDScreenWidth - 45, y: 30, width: 30, height: 30)
deleteBtn.setBackgroundImage(UIImage(named: "delete"), for: .normal)
// self.view.addSubview(deleteBtn)
// deleteBtn.addTarget(self, action: #selector(delete(btn:)), for: .touchUpInside)
self.view.addSubview(indexLabel)
indexLabel.backgroundColor = UIColor.black
indexLabel.textColor = UIColor.white
indexLabel.textAlignment = .center
indexLabel.frame = CGRect(x: 0, y: kJDScreenHeight - 40, width: 80, height: 30)
indexLabel.centerX = kJDScreenWidth * 0.5
// saveBtn.frame = CGRect(x: kJDScreenWidth - 80, y: indexLabel.y, width: 50, height: 50)
// saveBtn.addTarget(self, action: #selector(saveImg), for: .touchUpInside)
// self.view.addSubview(saveBtn)
if self.imageSourceTp == .image{
guard let kcount = images?.count else { return }
indexLabel.text = "\((currentPage ?? 0) + 1)/\(kcount)"
}else if self.imageSourceTp == .url{
guard let kcount = urls?.count else { return }
indexLabel.text = "\((currentPage ?? 0) + 1)/\(kcount)"
}else if self.imageSourceTp == .asserts{
guard let kcount = asserts?.count else { return }
indexLabel.text = "\((currentPage ?? 0) + 1)/\(kcount)"
}
}
//删除
@objc private func delete(btn: UIButton){
if deleteButtonClosure != nil {
deleteButtonClosure?((currentPage ?? 0))
}
}
//--------懒加载--------
fileprivate lazy var photoBrowserAnimator : JDPhotoBrowserAnimator = JDPhotoBrowserAnimator()
private lazy var deleteBtn : UIButton = {
let btn: UIButton = UIButton()
btn.setTitleColor(UIColor.red, for: .normal)
btn.titleLabel?.font = UIFont.systemFont(ofSize: 14)
return btn
}()
private lazy var saveBtn : UIButton = {
let btn: UIButton = UIButton()
btn.size = CGSize(width: 50, height: 50)
btn.setBackGroundColor(color: UIColor.red, type: .normal)
btn.setTitleColor(UIColor.red, for: .normal)
btn.titleLabel?.font = UIFont.systemFont(ofSize: 14)
return btn
}()
// @objc private func saveImg(){
// let indexPath = IndexPath(item: (currentPage ?? 0), section: 0)
// let cell = self.collectionView.cellForItem(at: indexPath) as! JDPhotoBrowserCell
//
// self.saveImageToPhotoAlbum1(saveImage: cell.backImg.image!)
// }
//
// //保存照片
// func saveImageToPhotoAlbum1(saveImage: UIImage){
// UIImageWriteToSavedPhotosAlbum(saveImage, self, #selector(saveImageToo(image:didFinishSavingWithError:contextInfo:)), nil)
// }
//
// func saveImageToo(image:UIImage,didFinishSavingWithError error:NSError?,contextInfo:AnyObject) {
// if error != nil {
// return
// } else {
// // SVProgressHUD.showSuccess(withStatus: "保存成功")
// }
//
//
// }
}
extension JDPhotoBrowser :UICollectionViewDelegate,UICollectionViewDataSource{
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
if self.imageSourceTp == .image {
return (self.images?.count)!
}else if self.imageSourceTp == .url{
return (self.urls?.count)!
}else {
return (self.asserts?.count)!
}
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: jdkresuId, for: indexPath as IndexPath) as! JDPhotoBrowserCell
cell.scrollView.setZoomScale(1, animated: false)
if self.imageSourceTp == .image {
cell.image = self.images?[indexPath.item]
}else if self.imageSourceTp == .url{
cell.imageUrl = self.urls?[indexPath.item]
}else if self.imageSourceTp == .asserts{
cell.assert = self.asserts?[indexPath.item]
}
cell.cellPhotoBrowserAnimator = photoBrowserAnimator
return cell
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
self.dismiss(animated: true, completion: nil)
}
func scrollViewWillBeginDecelerating(_ scrollView: UIScrollView) {
}
func scrollViewDidScroll(_ scrollView: UIScrollView) {
currentPage = Int(scrollView.contentOffset.x / scrollView.width)
lastPage = currentPage!
photoBrowserAnimator.currentPage = currentPage ?? 0
}
func scrollViewDidEndDecelerating(_ scrollView: UIScrollView){
if self.endPageIndexClosure != nil {
endPageIndexClosure?(currentPage ?? 0)
}
}
}
单一图片父控件类
import UIKit
import Photos
import SDWebImage
class JDPhotoBrowserCell: UICollectionViewCell,UIGestureRecognizerDelegate ,UIScrollViewDelegate{
var imageRect = CGRect(x: 0 , y:0, width: kJDScreenWidth , height: kJDScreenHeight )
var isDissmiss: Bool = false
var totalScale : CGFloat = 1.0
var maxScale : CGFloat = 5.0
var minScale : CGFloat = 1
var isImageDone: Bool = false
var cellPhotoBrowserAnimator : JDPhotoBrowserAnimator?
var image: UIImage?{
didSet{
backImg.image = image
self.getImageSize(image: image!)
}
}
var lastImageId: Int32 = 0
var assert: PHAsset?{
didSet{
if assert != nil {
self.getOrangeImage(asset: assert!) {[weak self] (data) in
let img = UIImage(data: data!)
if data != nil {
self?.backImg.image = img
self?.getImageSize(image: (self?.backImg.image)!)
}
}
}
}
}
var imageUrl: String?{
didSet{
self.cellPhotoBrowserAnimator?.isImageDone = false
self.isImageDone = false
self.backImg.sd_setImage(with: URL(string: imageUrl!), placeholderImage: placeImage, options: .progressiveDownload, progress: { (receive, all, _) in
}) { (image, _, _, _) in
self.getImageSize(image: image!)
}
}
}
typealias ImgCallBackType = (Data?)->()
//获取原图
private func getOrangeImage(asset: PHAsset,callback: @escaping ImgCallBackType){
//获取原图
let option = PHImageRequestOptions()
option.isSynchronous = true
option.resizeMode = .exact
lastImageId = PHImageManager.default().requestImageData(for: asset, options: option, resultHandler: { (data, string, up, nil) in
if data != nil{
callback(data)
}
})
}
//大图尺寸
func getImageSize(image: UIImage){
self.isImageDone = true
self.cellPhotoBrowserAnimator?.isImageDone = true
let imageSize = image.size
let imageW = imageSize.width
let imageH = imageSize.height
let actualImageW = kJDScreenWidth
let actualImageH = actualImageW/imageW * imageH
imageRect = CGRect(x: 0, y: (kJDScreenHeight - actualImageH)/2, width: actualImageW, height: actualImageH)
if actualImageH > kJDScreenHeight {
imageRect = CGRect(x: 0, y: 0, width: kJDScreenWidth, height: kJDScreenHeight)
}
self.scrollView.contentSize = CGSize(width: imageRect.size.width, height: imageRect.size.height)
self.scrollView.contentInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
self.scrollView.contentInset = UIEdgeInsets(top: imageRect.origin.y, left: 0, bottom: 0, right: 0)
backImg.frame = CGRect(x: 0, y: 0, width: imageRect.size.width, height: imageRect.size.height)
backImg.layoutIfNeeded()
scrollView.layoutIfNeeded()
}
override init(frame: CGRect) {
super.init(frame: frame)
self.backgroundColor = UIColor.black
self.contentView.addSubview(scrollView)
scrollView.addSubview(backImg)
scrollView.delegate = self
addGesture()
}
private func addGesture(){
//单击
let tap = UITapGestureRecognizer(target: self, action: #selector(backImgTap1(recognizer:)))
tap.numberOfTouchesRequired = 1
tap.numberOfTapsRequired = 1
tap.delegate = self
backImg.addGestureRecognizer(tap)
self.scrollView.addGestureRecognizer(tap)
//双击
let tap2 = UITapGestureRecognizer(target: self, action: #selector(backImgTap2(recognizer:)))
tap2.numberOfTapsRequired = 2
tap2.numberOfTouchesRequired = 1
tap2.delegate = self
backImg.addGestureRecognizer(tap2)
tap.require(toFail: tap2)
self.scrollView.addGestureRecognizer(tap2)
//啮合手势
let pinch = UIPinchGestureRecognizer(target: self, action: #selector(pinchDid(recognizer:)))
pinch.delegate = self
backImg.addGestureRecognizer(pinch)
//拖拽
let pan = UIPanGestureRecognizer(target: self, action: #selector(panDid(recognizer:)))
pan.maximumNumberOfTouches = 1 //一个手指拖动
pan.delegate = self
backImg.addGestureRecognizer(pan)
}
//拖拽
@objc private func panDid(recognizer:UIPanGestureRecognizer) {
let backImageVi = recognizer.view as! UIImageView
let point = recognizer.translation(in: self.contentView)
backImageVi.transform.translatedBy(x: point.x, y: point.y)
recognizer.setTranslation(CGPoint(x: 0, y: 0), in: backImageVi)
}
//单击
@objc private func backImgTap1(recognizer: UITapGestureRecognizer){
let fatherVc = self.backImg.getCurrentVc() as! JDPhotoBrowser
fatherVc.dismiss(animated: true, completion: nil)
}
//双击
@objc private func backImgTap2(recognizer: UITapGestureRecognizer){
let backImageVi = self.backImg
let touchPoint = recognizer.location(in: backImageVi)
UIView.animate(withDuration: 0.25) {
if backImageVi.width > self.imageRect.width{//缩小
self.scrollView.contentInset = UIEdgeInsets(top: self.imageRect.origin.y, left: 0, bottom: 0, right: 0)
let zoomRect = self.zoomRectFor(scale: 1, center: touchPoint)
self.scrollView.zoom(to:zoomRect, animated: true)
self.scrollView.layoutIfNeeded()
}else{//放大
let bili = kJDScreenHeight/self.imageRect.height
// print("bili",bili)
if bili > 2{
let zoomRect = self.zoomRectFor(scale: bili, center: touchPoint)
self.scrollView.zoom(to:zoomRect, animated: true)
}else{
let zoomRect1 = self.zoomRectFor(scale: 2, center: touchPoint)
self.scrollView.zoom(to:zoomRect1, animated: true)
}
self.scrollView.contentInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
self.scrollView.layoutIfNeeded()
}
}
}
//捏合
@objc private func pinchDid(recognizer: UIPinchGestureRecognizer){
self.scrollView.contentInset = UIEdgeInsets(top: self.imageRect.origin.y, left: 0, bottom: 0, right: 0)
let scale = recognizer.scale
self.totalScale *= scale
recognizer.scale = 1.0;
if totalScale > maxScale {
return
}
if totalScale < minScale{
return
}
self.scrollView.setZoomScale(totalScale, animated: true)
self.scrollView.layoutIfNeeded()
}
func zoomRectFor(scale: CGFloat,center: CGPoint) -> CGRect{
let imgW = imageRect.size.width
let imgH = imageRect.size.height
var zoomRect: CGRect = CGRect(x: 0, y: 0, width: 0, height: 0)
zoomRect.size.height = imgH / scale
zoomRect.size.width = imgW / scale
zoomRect.origin.x = center.x - (zoomRect.size.width / 2.0)
zoomRect.origin.y = center.y - (zoomRect.size.height / 2.0)
return zoomRect;
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
//允许多个手势存在
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool{
return true
}
func scrollViewDidScroll(_ scrollView: UIScrollView){
}
// 告诉scrollview要缩放的是哪个子控件
func viewForZooming(in scrollView: UIScrollView) -> UIView? {
return self.backImg
}
func scrollViewDidEndZooming(_ scrollView: UIScrollView, with view: UIView?, atScale scale: CGFloat) {
if totalScale >= maxScale {
totalScale = maxScale
}else if totalScale < minScale{
totalScale = minScale
}
}
// ------懒加载------
lazy var backImg : UIImageView = {
var img = UIImageView()
img.isUserInteractionEnabled = true
img.contentMode = .scaleAspectFit
img.frame = CGRect(x: 0, y: 0, width: kJDScreenWidth , height: kJDScreenHeight )
img.backgroundColor = UIColor.black
return img
}()
lazy var scrollView: UIScrollView = {
let scrollView = UIScrollView()
scrollView.backgroundColor = UIColor.black
scrollView.minimumZoomScale = 1;
scrollView.maximumZoomScale = 5;
scrollView.frame = CGRect(x: 0, y: 0, width: kJDScreenWidth, height: kJDScreenHeight)
scrollView.contentSize = CGSize(width: kJDScreenWidth, height: kJDScreenHeight)
scrollView.isUserInteractionEnabled = true
scrollView.setZoomScale(1, animated: false)
scrollView.alwaysBounceHorizontal = true
return scrollView
}()
lazy var placeImage: UIImage = {
let image = UIImage(named: "blackall")
return image!
}()
}
由于图片前后两种显示模式,不处理好的话会出现下面的问题
图片浏览器2.gif
自定义转场动画类
import UIKit
class JDPhotoBrowserAnimator: NSObject {
var imageRect = CGRect(x: 0 , y:0, width: kJDScreenWidth , height: kJDScreenHeight )
var isPresented : Bool = false
var sourceImageView: UIImageView? // 来源view
var endImageView: UIImageView? // 消失时候view
var currentPage: Int = 0
var preSnapView : UIView?
var isAniDone : Bool = false
var superVc: JDPhotoBrowser?
//加载进度提示框
private lazy var progressView : UIActivityIndicatorView = {
let loadVi = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.whiteLarge)
loadVi.startAnimating()
return loadVi
}()
var isImageDone: Bool?{
didSet{
if isImageDone == true && self.isAniDone == true{
progressView.removeFromSuperview()
self.preSnapView?.removeFromSuperview()
}else{
if self.isAniDone == true {
progressView.center = CGPoint(x: imageRect.size.width/2, y: imageRect.size.height/2)
self.preSnapView?.addSubview(progressView)
// print("加载中")
}
}
}
}
}
extension JDPhotoBrowserAnimator : UIViewControllerTransitioningDelegate{
// isPresented 调用的动画
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
isPresented = true
return self
}
//消失时候调用的动画
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
isPresented = false
return self
}
}
extension JDPhotoBrowserAnimator : UIViewControllerAnimatedTransitioning{
//动画时间
func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
return 0.3
}
//动画方式
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
isPresented ? animationForPresentedView(transitionContext) : animationForDismissView(transitionContext)
}
//弹出动画
func animationForPresentedView(_ transitionContext: UIViewControllerContextTransitioning){
//取出下一个 view 浏览器
let presentedView = transitionContext.view(forKey: UITransitionContextViewKey.to)!
transitionContext.containerView.addSubview(presentedView)
if sourceImageView == nil {
transitionContext.completeTransition(true)
return
}
let imgView = UIImageView()
imgView.image = sourceImageView?.image
// imgView.frame = (sourceImageView?.frame)!
let window = UIApplication.shared.keyWindow
imgView.frame = (sourceImageView?.convert((sourceImageView?.bounds)!, to: window))!
self.getImageSize()
let imgSize = imgView.image?.size
let imgW = imgSize?.width
let imgH = imgSize?.height
imgView.width = (sourceImageView?.width)!
imgView.height = (sourceImageView?.width)!/imgW! * imgH!
let snapView = imgView.snapshotView(afterScreenUpdates: true)
//截图
snapView?.frame = imgView.frame
transitionContext.containerView.addSubview(snapView!)
presentedView.alpha = 0.0
transitionContext.containerView.backgroundColor = UIColor.black
let tap = UITapGestureRecognizer(target: self, action: #selector(snapViewTap(recognizer:)))
tap.numberOfTouchesRequired = 1
tap.numberOfTapsRequired = 1
snapView?.addGestureRecognizer(tap)
self.preSnapView = snapView
self.isAniDone = false
UIView.animate(withDuration:0.3 , animations: {
snapView?.frame = self.imageRect
}, completion: { (_) in
self.isAniDone = true
let presentedVc = transitionContext.viewController(forKey: UITransitionContextViewControllerKey.to) as! JDPhotoBrowser
let indexPath = IndexPath(item: self.currentPage, section: 0)
guard presentedVc.collectionView.cellForItem(at: indexPath) != nil else { return }
let cell = presentedVc.collectionView.cellForItem(at: indexPath) as! JDPhotoBrowserCell
self.isImageDone = cell.isImageDone
presentedView.alpha = 1.0
transitionContext.containerView.backgroundColor = UIColor.clear
transitionContext.completeTransition(true)
})
}
//单击
@objc private func snapViewTap(recognizer: UITapGestureRecognizer){
self.superVc?.dismiss(animated: true, completion: nil)
}
//大图尺寸
func getImageSize(){
let imageSize = sourceImageView?.image?.size
let imageW = imageSize?.width
let imageH = imageSize?.height
let actualImageW = kJDScreenWidth
let actualImageH = actualImageW/imageW! * imageH!
imageRect = CGRect(x: 0, y: (kJDScreenHeight - actualImageH)/2, width: actualImageW, height: actualImageH)
}
//消失动画
func animationForDismissView(_ transitionContext: UIViewControllerContextTransitioning){
//上一级view
let dismissView = transitionContext.view(forKey: UITransitionContextViewKey.from)!
let dismissVc = transitionContext.viewController(forKey: UITransitionContextViewControllerKey.from) as! JDPhotoBrowser
let indexPath = IndexPath(item: currentPage, section: 0)
if dismissVc.collectionView.cellForItem(at: indexPath) == nil {
//currentPage快速滑动一直不变 最后销毁了
transitionContext.completeTransition(true)
return
}
let cell = dismissVc.collectionView.cellForItem(at: indexPath) as! JDPhotoBrowserCell
let snapView = cell.backImg.snapshotView(afterScreenUpdates: true)
snapView?.frame = imageRect
transitionContext.containerView.addSubview(snapView!)
dismissView.removeFromSuperview()
UIView.animate(withDuration: 0.3, animations: {
if self.endImageView == nil{
snapView?.frame = self.imageRect
}else{
var theFrame: CGRect = (self.endImageView?.convert((self.endImageView?.bounds)!, to: self.endImageView?.getCurrentVc()?.view))!
//根据导航栏是不是透明的来做
if self.endImageView?.getCurrentVc()?.navigationController != nil && self.endImageView?.getCurrentVc()?.navigationController?.navigationBar.isTranslucent == false{
theFrame = CGRect(x: theFrame.origin.x, y: theFrame.origin.y + 64, width: theFrame.size.width, height: theFrame.size.height)
}
snapView?.frame = theFrame
}
}, completion: { (_) in
snapView?.removeFromSuperview()
transitionContext.completeTransition(true)
})
}
} } }