fix(ios): prevents iOS plugin from crashing when destroy is called wi…

…thout a callback Closes #142
bitpay · May 17, 2018 · 610a004 · 610a004
1 parent c9531b8
commit 610a004
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/src/ios/QRScanner.swift b/src/ios/QRScanner.swift
@@ -42,8 +42,10 @@ class QRScanner : CDVPlugin, AVCaptureMetadataOutputObjectsDelegate {
         }
 
         func removePreviewLayer() {
-            self.videoPreviewLayer!.removeFromSuperlayer()
-            self.videoPreviewLayer = nil
+            if self.videoPreviewLayer != nil {
+                self.videoPreviewLayer!.removeFromSuperlayer()
+                self.videoPreviewLayer = nil
+            }
         }
     }