Fix downloadFile

salesbook.Maui/Platforms/iOS/Core/FilePreviewService.cs

@@ -0,0 +1,24 @@
+using QuickLook;
+using salesbook.Maui.Core.Interface;
+using salesbook.Maui.Helpers;
+using UIKit;
+
+namespace salesbook.Maui.Core;
+
+public class FilePreviewService : IFilePreviewService
+{
+    public Task Preview(string fileName, string filePath)
+    {
+        var currentController = UIApplication.SharedApplication.KeyWindow?.RootViewController;
+        while (currentController?.PresentedViewController != null)
+            currentController = currentController.PresentedViewController;
+
+        var currentView = currentController?.View;
+        var qLPreview = new QLPreviewController();
+        var item = new QlPreviewItemBundle(fileName, filePath);
+        qLPreview.DataSource = new PreviewControllerDs(item);
+        currentController?.PresentViewController(qLPreview, true, null);
+        
+        return Task.CompletedTask;
+    }
+}