flutter pub add qrcode基于插件公开信息、社区数据与项目使用情况整理的选型参考。
qrcode 包是一个专为 iOS 和 Android 平台设计的 Flutter 插件，用于扫描二维码。在 iOS 上，它利用 AVCaptureSession 实现高效的条形码检测；在 Android 上，则使用 ZXing 库以确保可靠的扫描性能。这一轻量级解决方案使开发者能够以最少的配置将二维码扫描功能集成到其应用中。它支持实时扫描，并提供对解码数据的简单访问，非常适合需要从二维码快速获取数据的应用程序。
以下为关联源码仓库的 README 原文快照，最新内容请访问源码仓库。
A flutter plugin for scanning QR codes. Use AVCaptureSession in iOS and zxing in Android.
Add this to your package's pubspec.yaml file:
dependencies:
qrcode: ^1.0.5
You can install packages from the command line:
with Flutter:
$ flutter pub get
Now in your Dart code, you can use:
import 'package:qrcode/qrcode.dart';
class _MyAppState extends State<MyApp> {
QRCaptureController _captureController = QRCaptureController();
bool _isTorchOn = false;
@override
void initState() {
super.initState();
_captureController.onCapture((data) {
print('onCapture----$data');
});
}
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: Stack(
alignment: Alignment.center,
children: <Widget>[
QRCaptureView(controller: _captureController),
Align(
alignment: Alignment.bottomCenter,
child: _buildToolBar(),
)
],
),
),
);
}
Widget _buildToolBar() {
return Row(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
FlatButton(
onPressed: () {
_captureController.pause();
},
child: Text('pause'),
),
FlatButton(
onPressed: () {
if (_isTorchOn) {
_captureController.torchMode = CaptureTorchMode.off;
} else {
_captureController.torchMode = CaptureTorchMode.on;
}
_isTorchOn = !_isTorchOn;
},
child: Text('torch'),
),
FlatButton(
onPressed: () {
_captureController.resume();
},
child: Text('resume'),
),
],
);
}
}
To use on iOS, you must add the following to your Info.plist
<key>NSCameraUsageDescription</key>
<string>Camera permission is required for qrcode scanning.</string>
<key>io.flutter.embedded_views_preview</key>
<true/>
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