diff --git a/PhotoBrowser/Photo.swift b/PhotoBrowser/Photo.swift
index 0545e15..e8c3638 100644
--- a/PhotoBrowser/Photo.swift
+++ b/PhotoBrowser/Photo.swift
@@ -19,14 +19,16 @@ public struct Photo {
     public var title: String?
     public var object: AnyObject?
     public var asset: PHAsset?
+    public var fileKey: String?
     
-    public init(image: UIImage?, title: String? = nil, thumbnailImage: UIImage? = nil, photoUrl: URL? = nil, thumbnailUrl: URL? = nil, object: AnyObject? = nil) {
+    public init(image: UIImage?, title: String? = nil, thumbnailImage: UIImage? = nil, photoUrl: URL? = nil, thumbnailUrl: URL? = nil, object: AnyObject? = nil, fileKey: String?) {
         self.image = image
         self.title = title
         self.thumbnailImage = thumbnailImage
         self.photoUrl = photoUrl
         self.thumbnailUrl = thumbnailUrl
         self.object = object
+        self.fileKey = fileKey
     }
 
     public init(asset: PHAsset) {
@@ -36,9 +38,12 @@ public struct Photo {
     public func localOriginalPhoto() -> UIImage? {
         if image != nil {
             return image
+        } else if let originFileKey = fileKey {
+            let image = KingfisherManager.shared.cache.retrieveImageInMemoryCache(forKey: originFileKey)
+            return image ?? KingfisherManager.shared.cache.retrieveImageInDiskCache(forKey: originFileKey)
         } else if let photoUrl = photoUrl {
-            let image = KingfisherManager.shared.cache.retrieveImageInMemoryCache(forKey: photoUrl.kfCacheKey)
-            return image ?? KingfisherManager.shared.cache.retrieveImageInDiskCache(forKey: photoUrl.kfCacheKey)
+            let image = KingfisherManager.shared.cache.retrieveImageInMemoryCache(forKey: photoUrl.absoluteString)
+            return image ?? KingfisherManager.shared.cache.retrieveImageInDiskCache(forKey: photoUrl.absoluteString)
         }
         return nil
     }
@@ -65,13 +70,3 @@ public struct Photo {
         
     }
 }
-
-extension URL {
-    var kfCacheKey: String {
-        var photoCacheKey = absoluteString
-        if let query = query {
-            photoCacheKey = absoluteString.replacingOccurrences(of: query, with: "")
-        }
-        return photoCacheKey
-    }
-}
diff --git a/PhotoBrowser/PhotoPreviewController.swift b/PhotoBrowser/PhotoPreviewController.swift
index 0e1760e..9c86c33 100644
--- a/PhotoBrowser/PhotoPreviewController.swift
+++ b/PhotoBrowser/PhotoPreviewController.swift
@@ -163,7 +163,7 @@ class PhotoPreviewController: UIViewController {
                 waitingView.removeFromSuperview()
             }
             
-            if let photoUrl = photo.photoUrl {
+            if let photoUrl = photo.photoUrl, let photoFileKey = photo.fileKey {
                 waitingView = WaitingView.init(frame: CGRect(x: 0, y: 0, width: 70, height: 70))
                 
                 if let newWaitingView = waitingView {
@@ -171,7 +171,7 @@ class PhotoPreviewController: UIViewController {
                     view.addSubview(newWaitingView)
                 }
                 
-                let resource = ImageResource(downloadURL: photoUrl, cacheKey: photoUrl.kfCacheKey)
+                let resource = ImageResource(downloadURL: photoUrl, cacheKey: photoFileKey)
                 imageView.kf.setImage(with: resource, placeholder: photo.localThumbnailPhoto(), options: nil, progressBlock: { (receivedSize, totalSize) -> () in
                     let progress = CGFloat(receivedSize) / CGFloat(totalSize)
                     if let waitingView = self.waitingView {
diff --git a/PhotoBrowserDemo/ViewController.swift b/PhotoBrowserDemo/ViewController.swift
index b6edde5..a8f0757 100644
--- a/PhotoBrowserDemo/ViewController.swift
+++ b/PhotoBrowserDemo/ViewController.swift
@@ -47,9 +47,9 @@ extension ViewController {
         let thumbnail3 = UIImage.init(named: "thumbnail3")
         let photoUrl3 = URL.init(string: "https://pic2.zhimg.com/a5455838750e168d97480d9247537d31_r.jpeg")
         
-        let photo = Photo.init(image: nil, title:"Image1fjdkkfadjfkajdkfalkdsfjklasfklaskdfkadsjfklajklsdjfkajsdkfaksdjfkajsdkfjlaksdfjkakdfklak", thumbnailImage: thumbnail1, photoUrl: photoUrl1)
-        let photo2 = Photo.init(image: nil, title:"Image2", thumbnailImage: thumbnail2, photoUrl: photoUrl2)
-        let photo3 = Photo.init(image: nil, title:"Image3", thumbnailImage: thumbnail3, photoUrl: photoUrl3)
+        let photo = Photo.init(image: nil, title:"Image1fjdkkfadjfkajdkfalkdsfjklasfklaskdfkadsjfklajklsdjfkajsdkfaksdjfkajsdkfjlaksdfjkakdfklak", thumbnailImage: thumbnail1, photoUrl: photoUrl1, fileKey: "abc100")
+        let photo2 = Photo.init(image: nil, title:"Image2", thumbnailImage: thumbnail2, photoUrl: photoUrl2, fileKey: "abc101")
+        let photo3 = Photo.init(image: nil, title:"Image3", thumbnailImage: thumbnail3, photoUrl: photoUrl3, fileKey: "abc102")
 
         let item1 = PBActionBarItem(title: "ONE", style: .plain) { (photoBrowser, item) in
             let photos = [photo, photo2]