v1.2.1 待发布
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@@ -1,148 +1,155 @@
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import 'package:flutter/material.dart';
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import 'package:get/get.dart';
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import 'package:getx_scaffold/getx_scaffold.dart';
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import 'package:qr_code_scanner_plus/qr_code_scanner_plus.dart';
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import 'package:ln_jq_app/common/styles/theme.dart';
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import 'package:mobile_scanner/mobile_scanner.dart';
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import 'controller.dart';
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class QrCodePage extends GetView<QrCodeController> {
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const QrCodePage({Key? key}) : super(key: key);
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const QrCodePage({super.key});
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@override
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Widget build(BuildContext context) {
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return GetBuilder<QrCodeController>(
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init: QrCodeController(),
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id: 'qrcode',
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builder: (_) {
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return Scaffold(
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extendBodyBehindAppBar: true,
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appBar: AppBar(
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title: const Text('扫码', style: TextStyle(color: Colors.white)),
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centerTitle: true,
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backgroundColor: Colors.transparent,
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elevation: 0,
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leading: IconButton(
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icon: const Icon(Icons.arrow_back_ios, color: Colors.white),
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onPressed: () => Get.back(),
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Get.put(QrCodeController());
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return Scaffold(
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extendBodyBehindAppBar: true,
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appBar: AppBar(
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title: const Text('扫码', style: TextStyle(color: Colors.white)),
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centerTitle: true,
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backgroundColor: Colors.transparent,
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elevation: 0,
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leading: IconButton(
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icon: const Icon(Icons.arrow_back_ios, color: Colors.white),
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onPressed: () => Get.back(),
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),
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actions: [
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TextButton(
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onPressed: controller.requestPhotoPermission,
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child: const Text('相册', style: TextStyle(color: Colors.white, fontSize: 16)),
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),
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],
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),
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body: Stack(
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alignment: Alignment.center,
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children: [
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// 1. 使用 MobileScanner 作为扫描视图
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MobileScanner(
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controller: controller.scannerController,
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onDetect: controller.onDetect,
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// 您可以自定义扫描框的样式
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scanWindow: Rect.fromCenter(
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center: Offset(
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MediaQuery.of(context).size.width / 2,
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MediaQuery.of(context).size.height / 2 - 50,
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),
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width: 250,
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height: 250,
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),
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actions: [
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TextButton(
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onPressed: controller.requestPhotoPermission,
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child: const Text(
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'相册',
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style: TextStyle(color: Colors.white, fontSize: 16),
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),
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),
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],
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),
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body: Stack(
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children: <Widget>[
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_buildQrView(context),
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Positioned(
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bottom: 80.h,
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left: 0,
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right: 0,
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child: _buildControlButtons(),
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),
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],
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),
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);
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},
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// 扫描动画和覆盖层
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_buildScannerOverlay(context),
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// 底部的功能按钮
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Positioned(bottom: 80, left: 0, right: 0, child: _buildActionButtons()),
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],
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),
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);
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}
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/// 构建二维码扫描视图（带动画）
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Widget _buildQrView(BuildContext context) {
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// 定义扫描区域的大小
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var scanArea = (MediaQuery.of(context).size.width < 400 ||
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MediaQuery.of(context).size.height < 400)
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? 250.0
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: 300.0;
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/// 构建扫描区域的覆盖层和动画
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Widget _buildScannerOverlay(BuildContext context) {
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// 模拟扫描框的位置和大小
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const double scanAreaSize = 250.0;
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return Stack(
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alignment: Alignment.center,
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children: <Widget>[
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// 底层是相机视图和半透明遮罩
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QRView(
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key: controller.qrKey,
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onQRViewCreated: controller.onQRViewCreated,
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overlay: QrScannerOverlayShape(
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borderColor: Colors.blueAccent,
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borderRadius: 10,
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borderLength: 30,
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borderWidth: 10,
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cutOutSize: scanArea,
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),
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),
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// 上层是扫描动画
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AnimatedBuilder(
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animation: controller.scanAnimation,
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builder: (context, child) {
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return Positioned(
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// 计算扫描框的顶部位置，以便动画从顶部开始
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top: (MediaQuery.of(context).size.height - scanArea) / 2,
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child: Transform.translate(
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offset: Offset(0, controller.scanAnimation.value * scanArea),
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children: [
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// 半透明的覆盖层
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ColorFiltered(
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colorFilter: ColorFilter.mode(Colors.black.withOpacity(0.5), BlendMode.srcOut),
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child: Stack(
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children: [
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Container(decoration: const BoxDecoration(color: Colors.transparent)),
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Align(
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alignment: Alignment.center,
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child: Container(
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width: scanArea,
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height: 2, // 扫描线的高度
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margin: const EdgeInsets.only(bottom: 100), // 微调位置
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width: scanAreaSize,
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height: scanAreaSize,
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decoration: BoxDecoration(
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color: Colors.blueAccent,
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boxShadow: [
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BoxShadow(
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color: Colors.blueAccent.withOpacity(0.7),
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blurRadius: 8,
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spreadRadius: 2,
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),
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],
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color: Colors.black,
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borderRadius: BorderRadius.circular(12),
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),
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),
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),
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);
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},
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],
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),
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),
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// 扫描动画
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Align(
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alignment: Alignment.center,
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child: Container(
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margin: const EdgeInsets.only(bottom: 100),
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width: scanAreaSize,
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height: scanAreaSize,
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child: AnimatedBuilder(
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animation: controller.scanAnimation,
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builder: (context, child) {
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return CustomPaint(
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painter: ScannerAnimationPainter(
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controller.scanAnimation.value,
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AppTheme.themeColor,
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),
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);
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},
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),
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),
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),
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],
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);
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}
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/// 构建底部的控制按钮
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Widget _buildControlButtons() {
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return Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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const Text(
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'将二维码/条形码放入框内，即可自动扫描',
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style: TextStyle(color: Colors.white, fontSize: 14),
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),
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const SizedBox(height: 20),
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Row(
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mainAxisAlignment: MainAxisAlignment.spaceEvenly,
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crossAxisAlignment: CrossAxisAlignment.center,
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children: <Widget>[
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// 闪光灯按钮
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_buildIconButton(
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onPressed: controller.toggleFlash,
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//闪光灯状态的变化
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child: Obx(() => Icon(
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controller.isFlashOn.value ? Icons.flash_on : Icons.flash_off,
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color: Colors.white,
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size: 28,
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)),
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),
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// 翻转相机按钮
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_buildIconButton(
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onPressed: controller.flipCamera,
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child: const Icon(
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Icons.flip_camera_ios,
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color: Colors.white,
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size: 28,
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/// 构建底部的功能按钮（闪光灯、相册）
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Widget _buildActionButtons() {
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return Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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const Text(
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'将二维码/条形码放入框内，即可自动扫描',
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style: TextStyle(color: Colors.white, fontSize: 14),
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),
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const SizedBox(height: 20),
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Row(
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mainAxisAlignment: MainAxisAlignment.spaceEvenly,
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crossAxisAlignment: CrossAxisAlignment.center,
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children: <Widget>[
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// 闪光灯按钮
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_buildIconButton(
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onPressed: controller.toggleFlash,
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//闪光灯状态的变化
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child: Obx(
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() => IconButton(
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icon: Icon(
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controller.isFlashOn.value ? Icons.flash_on : Icons.flash_off,
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color: Colors.white,
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size: 28,
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),
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onPressed: controller.toggleFlash,
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),
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),
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),
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),
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],
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),
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],
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);
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}
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// 翻转相机按钮
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_buildIconButton(
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onPressed: controller.flipCamera,
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child: const Icon(
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Icons.flip_camera_ios,
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color: Colors.white,
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size: 28,
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),
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),
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],
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),
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],
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);
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}
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Widget _buildIconButton({required VoidCallback onPressed, required Widget child}) {
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return Container(
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@@ -158,3 +165,71 @@ class QrCodePage extends GetView<QrCodeController> {
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);
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}
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}
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/// 扫描动画的绘制器
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class ScannerAnimationPainter extends CustomPainter {
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final double value;
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final Color borderColor;
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ScannerAnimationPainter(this.value, this.borderColor);
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@override
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void paint(Canvas canvas, Size size) {
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final paint = Paint()
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..color = borderColor
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..strokeWidth = 3
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..style = PaintingStyle.stroke;
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final cornerLength = 20.0;
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// 绘制四个角的边框
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// Top-left
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canvas.drawPath(
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Path()
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..moveTo(0, cornerLength)
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..lineTo(0, 0)
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..lineTo(cornerLength, 0),
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paint,
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);
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// Top-right
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canvas.drawPath(
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Path()
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..moveTo(size.width - cornerLength, 0)
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..lineTo(size.width, 0)
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..lineTo(size.width, cornerLength),
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paint,
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);
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// Bottom-left
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canvas.drawPath(
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Path()
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..moveTo(0, size.height - cornerLength)
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..lineTo(0, size.height)
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..lineTo(cornerLength, size.height),
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paint,
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);
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// Bottom-right
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canvas.drawPath(
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Path()
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..moveTo(size.width - cornerLength, size.height)
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..lineTo(size.width, size.height)
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..lineTo(size.width, size.height - cornerLength),
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paint,
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);
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// 绘制扫描线
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final linePaint = Paint()
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..color = borderColor.withOpacity(0.8)
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..strokeWidth = 2
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..shader = LinearGradient(
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colors: [borderColor.withOpacity(0), borderColor, borderColor.withOpacity(0)],
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stops: const [0.0, 0.5, 1.0],
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).createShader(Rect.fromLTWH(0, 0, size.width, size.height));
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final y = size.height * value;
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canvas.drawLine(Offset(0, y), Offset(size.width, y), linePaint);
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}
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@override
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bool shouldRepaint(covariant CustomPainter oldDelegate) {
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return true;
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}
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}
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