ScanKitController constructor
ScanKitController()
Implementation
ScanKitController() {
var eventChannel = EventChannel('xyz.bczl.flutter_scankit/event');
_eventSubscription = eventChannel.receiveBroadcastStream()
.listen(_eventHandler,cancelOnError: false);
_channel = const MethodChannel('xyz.bczl.flutter_scankit/ScanKitWidget');
}