Flutter Qr Code Scanner & Generator: Effortlessly Scan and Create QR Codes
最编程
2024-02-22 07:35:39
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import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:qr_code_scanner/qr_code_scanner.dart';
class ScanPage extends StatefulWidget {
final Function(Barcode? result)? completed;
const ScanPage({Key? key, this.completed,}) : super(key: key);
@override
State<ScanPage> createState() => _ScanPageState();
}
class _ScanPageState extends State<ScanPage> {
final GlobalKey qrKey = GlobalKey(debugLabel: 'QR');
QRViewController? _controller;
@override
void reassemble() {
super.reassemble();
_controller?.resumeCamera();
}
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: const Color.fromRGBO(0, 0, 0, 0.7), //默认颜色，太白了不好看
body: Stack(
children: [
QRView(
key: qrKey,
onQRViewCreated: _onQRViewCreated,
),
Positioned(
bottom: 60,
left: 0,
right: 0,
child: SafeArea(
child: CupertinoButton(
onPressed: () {
_controller?.toggleFlash();
},
child: Container(
alignment: Alignment.center,
height: 64,
child: Image.asset('images/flash_light.png'),
),
),
),
),
SafeArea(
child: GestureDetector(
onTap: () {
Navigator.of(context).pop();
},
child: const SizedBox(
width: 60,
height: 44,
child: Icon(
Icons.arrow_back_ios_new,
color: Colors.white,
size: 26,
),
),
),
),
],
),
);
}
void _onQRViewCreated(QRViewController controller) {
_controller = controller;
controller.scannedDataStream.listen((result) {
//print(result.code);
_controller!.stopCamera();
Navigator.of(context).pop();
if (widget.completed != null) {
widget.completed!(result);
}
});
}
@override
void dispose() {
_controller!.dispose();
super.dispose();
}
}