颤振qr_code_scanner单击对话框中的文本字段时相机无法打开

Question

我使用qr_code_scanner扫描qr码&条形码。它扫描得很完美。但是当我想在扫描后使用对话框询问你扫描了多少产品，然后检查并控制它。但是当我在对话框中使用文本框时，当我点击文本框时，相机停止工作并停留在黑屏上。我该怎么办?怎么了?我的扫描代码:

void _onQRViewCreated(QRViewController controller) {
this.controller = controller; 
controller.scannedDataStream.listen((scanData) { 
controller.pauseCamera();
player.play("scanner_sound.mp3");
inspect(args);
if (args.Barcode == scanData.code) {
showDialog(
context: context,
builder: (context) {
return WillPopScope(
onWillPop: () async {
Navigator.pop(context);
controller.resumeCamera();
return true;
},
child: AlertDialog(
title: const Text('Ürün Giriş'),
content: Column(
children: [
const Text('Bu üründen kaç adet okutuldu ?'),
TextField(
keyboardType: TextInputType.number,
controller: _controller,
),
],
),
actions: <Widget>[
TextButton(
onPressed: () { 
bool isTrue = checkScannedCount(int.parse(_controller.text));
if (isTrue) {
var model = args.copyWith(ScannedCount: args.Count);
context.read<ProductCubit>().updateProduct(model);
Navigator.pop(context);
Navigator.pop(context);
} else {
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(
content: Text("Lütfen sayımı tekrarlayınız."),
),
);
Navigator.pop(context);
controller.resumeCamera(); //Its not starting camera again.
}
},
child: const Text('Tamam')),
],
),
);
});
} else {
showDialog(
context: context,
builder: (context) {
return WillPopScope(
onWillPop: () async {
Navigator.pop(context);
controller.resumeCamera();
return true;
},
child: AlertDialog(
title: const Text('Hatalı Barkod veya Ürün'),
content: const Text('Yanlış ürünü veya barkodu okutuyor olabilirsiniz. Kontrol edip tekrar ediniz.'),
actions: <Widget>[
TextButton(
onPressed: () {
Navigator.pop(context);
controller.resumeCamera();
},
child: const Text('Tamam')),
],
),
);
});
}
});
}

Answer 1

不再支持qr_code_scanner。由于这个包的底层框架，android的zxing和iOS的mtbbarcodesscanner都不再维护。使用mobile_scanner