Improvements image !!

iOSClient/Main/NCDetailViewController.swift

@@ -746,19 +746,18 @@ extension NCDetailViewController: NCViewerImageViewControllerDelegate, NCViewerI
         }
     }
     
+    func viewerImageViewController(_ viewerImageViewController: NCViewerImageViewController, willChangeFocusTo index: Int, view: NCViewerImageContentView, metadata: tableMetadata) {
+        
+        statusViewImage(metadata: metadata, viewerImageViewController: viewerImageViewController)
+    }
+    
     func viewerImageViewController(_ viewerImageViewController: NCViewerImageViewController, didChangeFocusTo index: Int, view: NCViewerImageContentView, metadata: tableMetadata) {
-                        
+        
         if metadata.typeFile == k_metadataTypeFile_image && !view.isLoading {
-            DispatchQueue.global().async {
-                if let image = NCViewerImageCommon.shared.getImage(metadata: metadata) {
-                    DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(400)) {
-                        view.image = image
-                    }
-                }
+            if let image = NCViewerImageCommon.shared.getImage(metadata: metadata) {
+                view.image = image
             }
         }
-        
-        statusViewImage(metadata: metadata, viewerImageViewController: viewerImageViewController)
     }
     
     func viewerImageViewControllerTap(_ viewerImageViewController: NCViewerImageViewController, metadata: tableMetadata) {

iOSClient/Viewer/NCViewerImage/NCViewerImageViewController.swift

@@ -39,8 +39,9 @@ extension NCViewerImageViewControllerDataSource {
 
 protocol NCViewerImageViewControllerDelegate: class {
 
+    func viewerImageViewController(_ viewerImageViewController: NCViewerImageViewController, willChangeFocusTo index: Int, view: NCViewerImageContentView, metadata: tableMetadata)
     func viewerImageViewController(_ viewerImageViewController: NCViewerImageViewController, didChangeFocusTo index: Int, view: NCViewerImageContentView, metadata: tableMetadata)
-    
+
     func viewerImageViewControllerTap(_ viewerImageViewController: NCViewerImageViewController, metadata: tableMetadata)
     func viewerImageViewControllerLongPressBegan(_ viewerImageViewController: NCViewerImageViewController, metadata: tableMetadata)
     func viewerImageViewControllerLongPressEnded(_ viewerImageViewController: NCViewerImageViewController, metadata: tableMetadata)
@@ -51,6 +52,8 @@ protocol NCViewerImageViewControllerDelegate: class {
 extension NCViewerImageViewControllerDelegate {
 
     func viewerImageViewController(_ viewerImageViewController: NCViewerImageViewController, didChangeFocusTo index: Int, view: NCViewerImageContentView, metadata: tableMetadata) {}
+    func viewerImageViewController(_ viewerImageViewController: NCViewerImageViewController, willChangeFocusTo index: Int, view: NCViewerImageContentView, metadata: tableMetadata) {}
+
 }
 
 public class NCViewerImageViewController: UIViewController {
@@ -568,7 +571,7 @@ extension NCViewerImageViewController {
                 mediaContainerView.sendSubviewToBack(previousView)
             }
 
-            delegate?.viewerImageViewController(self, didChangeFocusTo: index, view: nextView, metadata: nextView.metadata)
+            delegate?.viewerImageViewController(self, willChangeFocusTo: index, view: nextView, metadata: nextView.metadata)
 
         } else if middleView.position > (1 + normalizedGap - normalizedCenter) {
 
@@ -589,7 +592,11 @@ extension NCViewerImageViewController {
                 mediaContainerView.bringSubviewToFront(nextView)
             }
 
-            delegate?.viewerImageViewController(self, didChangeFocusTo: index, view: previousView, metadata: previousView.metadata)
+            delegate?.viewerImageViewController(self, willChangeFocusTo: index, view: previousView, metadata: previousView.metadata)
+            
+        } else if middleView.position == 0 {
+            
+            delegate?.viewerImageViewController(self, didChangeFocusTo: index, view: middleView, metadata: middleView.metadata)
         }
     }