From 647926ee281712a82238d5153522d9a07be5870c Mon Sep 17 00:00:00 2001
From: Nathan Walker <walkerrunpdx@gmail.com>
Date: Tue, 29 Sep 2020 08:18:04 -0700
Subject: [PATCH] fix(ios): Utils.openFile (#8914)

closes https://github.com/NativeScript/NativeScript/issues/8913
---
 packages/core/utils/index.ios.ts         |  2 +-
 packages/core/utils/native-helper.d.ts   |  5 ++-
 packages/core/utils/native-helper.ios.ts | 53 +++++++++++++-----------
 3 files changed, 33 insertions(+), 27 deletions(-)

diff --git a/packages/core/utils/index.ios.ts b/packages/core/utils/index.ios.ts
index 90bc24dc2..1cce1b2a6 100644
--- a/packages/core/utils/index.ios.ts
+++ b/packages/core/utils/index.ios.ts
@@ -11,7 +11,7 @@ export function openFile(filePath: string): boolean {
 		let path = iOSNativeHelper.isRealDevice() ? filePath.replace('~', appPath) : filePath;
 
 		const controller = UIDocumentInteractionController.interactionControllerWithURL(NSURL.fileURLWithPath(path));
-		controller.delegate = <UIDocumentInteractionControllerDelegate>new iOSNativeHelper.UIDocumentInteractionControllerDelegateImpl();
+		controller.delegate = iOSNativeHelper.createUIDocumentInteractionControllerDelegate();
 
 		return controller.presentPreviewAnimated(true);
 	} catch (e) {
diff --git a/packages/core/utils/native-helper.d.ts b/packages/core/utils/native-helper.d.ts
index 19986a7cf..d402c33a2 100644
--- a/packages/core/utils/native-helper.d.ts
+++ b/packages/core/utils/native-helper.d.ts
@@ -168,7 +168,10 @@ export namespace iOSNativeHelper {
 	 */
 	export function applyRotateTransform(transform: any /* CATransform3D*/, x: number, y: number, z: number): any; /* CATransform3D*/
 
-	export class UIDocumentInteractionControllerDelegateImpl {}
+  /**
+   * Create a UIDocumentInteractionControllerDelegate implementation for use with UIDocumentInteractionController
+   */
+	export function createUIDocumentInteractionControllerDelegate(): any;
 
 	/**
 	 * Checks whether the application is running on real device and not on simulator.
diff --git a/packages/core/utils/native-helper.ios.ts b/packages/core/utils/native-helper.ios.ts
index 89d24b29b..b757a33b1 100644
--- a/packages/core/utils/native-helper.ios.ts
+++ b/packages/core/utils/native-helper.ios.ts
@@ -14,7 +14,7 @@ function openFileAtRootModule(filePath: string): boolean {
 		let path = iOSNativeHelper.isRealDevice() ? filePath.replace('~', appPath) : filePath;
 
 		const controller = UIDocumentInteractionController.interactionControllerWithURL(NSURL.fileURLWithPath(path));
-		controller.delegate = new iOSNativeHelper.UIDocumentInteractionControllerDelegateImpl();
+		controller.delegate = iOSNativeHelper.createUIDocumentInteractionControllerDelegate();
 
 		return controller.presentPreviewAnimated(true);
 	} catch (e) {
@@ -125,30 +125,33 @@ export namespace iOSNativeHelper {
 		}
 
 		return transform;
-	}
-
-	@NativeClass
-	export class UIDocumentInteractionControllerDelegateImpl extends NSObject implements UIDocumentInteractionControllerDelegate {
-		public static ObjCProtocols = [UIDocumentInteractionControllerDelegate];
-
-		public getViewController(): UIViewController {
-			const app = UIApplication.sharedApplication;
-
-			return app.keyWindow.rootViewController;
-		}
-
-		public documentInteractionControllerViewControllerForPreview(controller: UIDocumentInteractionController) {
-			return this.getViewController();
-		}
-
-		public documentInteractionControllerViewForPreview(controller: UIDocumentInteractionController) {
-			return this.getViewController().view;
-		}
-
-		public documentInteractionControllerRectForPreview(controller: UIDocumentInteractionController): CGRect {
-			return this.getViewController().view.frame;
-		}
-	}
+  }
+  
+  export function createUIDocumentInteractionControllerDelegate(): NSObject {
+    @NativeClass
+    class UIDocumentInteractionControllerDelegateImpl extends NSObject implements UIDocumentInteractionControllerDelegate {
+      public static ObjCProtocols = [UIDocumentInteractionControllerDelegate];
+  
+      public getViewController(): UIViewController {
+        const app = UIApplication.sharedApplication;
+  
+        return app.keyWindow.rootViewController;
+      }
+  
+      public documentInteractionControllerViewControllerForPreview(controller: UIDocumentInteractionController) {
+        return this.getViewController();
+      }
+  
+      public documentInteractionControllerViewForPreview(controller: UIDocumentInteractionController) {
+        return this.getViewController().view;
+      }
+  
+      public documentInteractionControllerRectForPreview(controller: UIDocumentInteractionController): CGRect {
+        return this.getViewController().view.frame;
+      }
+    }
+    return new UIDocumentInteractionControllerDelegateImpl();
+  }
 
 	export function isRealDevice() {
 		try {