From 9f7eaec71e9b0719627a3a81cd62cc7ace946fd3 Mon Sep 17 00:00:00 2001
From: Julian Steenbakker <juliansteenbakker@outlook.com>
Date: Thu, 25 Mar 2021 10:59:52 +0100
Subject: [PATCH] refactor: safe usage of updateDimensions

---
 lib/src/qr_code_scanner.dart | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/src/qr_code_scanner.dart b/lib/src/qr_code_scanner.dart
index 2fdc584..03a1a39 100644
--- a/lib/src/qr_code_scanner.dart
+++ b/lib/src/qr_code_scanner.dart
@@ -318,11 +318,12 @@ class QRViewController {
   }
 
   /// Updates the view dimensions for iOS.
-  static Future<void> updateDimensions(GlobalKey key, MethodChannel channel,
+  static Future<bool> updateDimensions(GlobalKey key, MethodChannel channel,
       {QrScannerOverlayShape? overlay}) async {
     if (defaultTargetPlatform == TargetPlatform.iOS) {
       // Add small delay to ensure the render box is loaded
       await Future.delayed(Duration(milliseconds: 100));
+      if (key.currentContext == null) return false;
       final renderBox = key.currentContext!.findRenderObject() as RenderBox;
       try {
         await channel.invokeMethod('setDimensions', {
@@ -331,9 +332,11 @@ class QRViewController {
           'scanArea': overlay?.cutOutSize ?? 0,
           'scanAreaOffset': overlay?.cutOutBottomOffset ?? 0
         });
+        return true;
       } on PlatformException catch (e) {
         throw CameraException(e.code, e.message);
       }
     }
+    return false;
   }
 }