coding

iOSClient/Networking/NCOperationQueue.swift

@@ -377,12 +377,17 @@ class NCOperationDownloadThumbnail: ConcurrentOperation {
             NCCommunication.shared.downloadPreview(fileNamePathOrFileId: fileNamePath, fileNamePreviewLocalPath: fileNamePreviewLocalPath , widthPreview: Int(k_sizePreview), heightPreview: Int(k_sizePreview), fileNameIconLocalPath: fileNameIconLocalPath, sizeIcon: Int(k_sizeIcon)) { (account, imagePreview, imageIcon,  errorCode, errorDescription) in
                 
                 var cell: NCImageCellProtocol?
-                if self.view is UICollectionView && NCMainCommon.shared.isValidIndexPath(self.indexPath, view: self.view) {
-                    cell = (self.view as! UICollectionView).cellForItem(at: self.indexPath) as? NCImageCellProtocol
-                } else if self.view is UITableView && NCMainCommon.shared.isValidIndexPath(self.indexPath, view: self.view) {
-                    cell = (self.view as! UITableView).cellForRow(at: self.indexPath) as? NCImageCellProtocol
+                
+                if self.view is UICollectionView {
+                    if self.indexPath.section < (self.view as! UICollectionView).numberOfSections && self.indexPath.row < (self.view as! UICollectionView).numberOfItems(inSection: self.indexPath.section) {
+                        cell = (self.view as! UICollectionView).cellForItem(at: self.indexPath) as? NCImageCellProtocol
+                    }
+                } else {
+                    if self.indexPath.section < (self.view as! UITableView).numberOfSections && self.indexPath.row < (self.view as! UITableView).numberOfRows(inSection: self.indexPath.section) {
+                        cell = (self.view as! UITableView).cellForRow(at: self.indexPath) as? NCImageCellProtocol
+                    }
                 }
-
+                
                 if (cell != nil) {
                     var previewImage: UIImage!
                     if errorCode == 0 && imageIcon != nil {