Fix downloadFile

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

@@ -0,0 +1,11 @@
+using salesbook.Maui.Core.Interface;
+
+namespace salesbook.Maui.Core;
+
+public class FilePreviewService :IFilePreviewService
+{
+    public Task Preview(string fileName, string filePath)
+    {
+        throw new NotImplementedException();
+    }
+}

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;
+    }
+}

salesbook.Maui/Platforms/iOS/Helpers/PreviewControllerDs.cs

@@ -0,0 +1,16 @@
+using QuickLook;
+
+namespace salesbook.Maui.Helpers;
+
+public class PreviewControllerDs(QLPreviewItem item) : QLPreviewControllerDataSource
+{
+    public override nint PreviewItemCount(QLPreviewController controller)
+    {
+        return 1;
+    }
+
+    public override IQLPreviewItem GetPreviewItem(QLPreviewController controller, nint index)
+    {
+        return item;
+    }
+}

salesbook.Maui/Platforms/iOS/Helpers/QlPreviewItemBundle.cs

@@ -0,0 +1,19 @@
+using Foundation;
+using QuickLook;
+
+namespace salesbook.Maui.Helpers;
+
+public class QlPreviewItemBundle(string fileName, string filePath) : QLPreviewItem
+{
+    public override string PreviewItemTitle => fileName;
+    public override NSUrl PreviewItemUrl
+    {
+        get
+        {
+            var documents = NSBundle.MainBundle.BundlePath;
+            var lib = Path.Combine(documents, filePath);
+            var url = NSUrl.FromFilename(lib);
+            return url;
+        }
+    }
+}

salesbook.Maui/Platforms/iOS/Helpers/QlPreviewItemFileSystem.cs

@@ -0,0 +1,12 @@
+using Foundation;
+using QuickLook;
+
+namespace salesbook.Maui.Helpers;
+
+public class QlPreviewItemFileSystem(string fileName, string filePath) : QLPreviewItem
+{
+    public override string PreviewItemTitle => fileName;
+
+    public override NSUrl PreviewItemUrl => NSUrl.FromString(filePath);
+
+}