Assigned the value only if it is null

enesbayar
Commit d1e7bfa56409780a1aaf482d9a45c0a9b870f55b d1e7bfa5 1 parent 250aed01
Showing 1 changed file with 1 additions and 1 deletions
lib/src/mobile_scanner.dart
--- a/lib/src/mobile_scanner.dart
View file @d1e7bfa
+++ b/lib/src/mobile_scanner.dart
View file @d1e7bfa
@@ -123,7 +123,7 @@ class _MobileScannerState extends State<MobileScanner>
       return;
     }
 
-     _barcodesSubscription = _controller.barcodes.listen(
+     _barcodesSubscription ??= _controller.barcodes.listen(
       widget.onDetect,
     );