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fix: prevent LateInitializationError: Field '_channel@NNN' has not been initialized #696

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fix: prevent LateInitializationError: Field '_channel@NNN' has not been initialized #696

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12 changes: 7 additions & 5 deletions lib/src/qr_code_scanner.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -58,7 +58,7 @@ class QRView extends StatefulWidget {
}

class _QRViewState extends State<QRView> {
late MethodChannel _channel;
MethodChannel? _channel;
late LifecycleEventHandler _observer;

@override
Expand Down Expand Up @@ -87,9 +87,11 @@ class _QRViewState extends State<QRView> {
}

Future<void> updateDimensions() async {
await QRViewController.updateDimensions(
widget.key as GlobalKey<State<StatefulWidget>>, _channel,
overlay: widget.overlay);
if (_channel != null) {
await QRViewController.updateDimensions(
widget.key as GlobalKey<State<StatefulWidget>>, _channel!,
overlay: widget.overlay);
}
}

bool onNotification(notification) {
Expand Down Expand Up @@ -154,7 +156,7 @@ class _QRViewState extends State<QRView> {

// Start scan after creation of the view
final controller = QRViewController._(
_channel,
_channel!,
widget.key as GlobalKey<State<StatefulWidget>>?,
widget.onPermissionSet,
widget.cameraFacing)
Expand Down