扫码页:改用WebView+quagga2 JS解码 全屏无蒙版实时条码识别
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97694732@qq.com
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hybrid/html/scanner.html
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198
hybrid/html/scanner.html
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width,initial-scale=1.0,maximum-scale=1.0,user-scalable=no">
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<title>扫码</title>
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<style>
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* { margin: 0; padding: 0; box-sizing: border-box; }
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html, body { width: 100%; height: 100%; overflow: hidden; background: #000; }
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#scanner-container {
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position: fixed;
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top: 0; left: 0;
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width: 100%; height: 100%;
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background: #000;
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}
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#scanner-container video {
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width: 100% !important;
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height: 100% !important;
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object-fit: cover;
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position: absolute;
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top: 0; left: 0;
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}
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/* 隐藏 quagga 的取景框 canvas */
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#scanner-container canvas {
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display: none !important;
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}
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/* 关闭按钮 */
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.close-btn {
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position: fixed;
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top: 60rpx;
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left: 30rpx;
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width: 60rpx;
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height: 60rpx;
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border-radius: 50%;
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background: rgba(255,255,255,0.2);
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display: flex;
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align-items: center;
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justify-content: center;
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z-index: 9999;
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color: #fff;
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font-size: 36rpx;
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}
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/* tip */
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.tip {
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position: fixed;
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bottom: 120rpx;
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left: 0;
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right: 0;
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text-align: center;
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z-index: 9999;
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}
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.tip-text {
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display: inline-block;
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color: #fff;
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font-size: 28rpx;
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background: rgba(0,0,0,0.5);
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padding: 12rpx 30rpx;
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border-radius: 40rpx;
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}
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/* 加载/错误提示 */
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.loading {
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position: fixed;
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top: 50%;
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left: 50%;
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transform: translate(-50%, -50%);
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color: #fff;
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font-size: 28rpx;
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z-index: 9999;
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text-align: center;
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}
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/* 适配 rpx 单位：假设 750rpx = 屏幕宽 */
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@media (min-width: 400px) {
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.close-btn { width: 40px; height: 40px; font-size: 22px; top: 40px; left: 20px; }
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.tip-text { font-size: 16px; padding: 8px 20px; border-radius: 28px; }
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.tip { bottom: 80px; }
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}
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</style>
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</head>
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<body>
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<div id="scanner-container"></div>
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<div class="close-btn" id="closeBtn">✕</div>
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<div class="tip"><span class="tip-text" id="tipText">对准条码自动识别</span></div>
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<div class="loading" id="loadingText">正在启动摄像头...</div>
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<script src="https://cdn.jsdelivr.net/npm/quagga2/dist/quagga.min.js"></script>
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<script>
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var detected = false;
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var closeBtn = document.getElementById('closeBtn');
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var loadingText = document.getElementById('loadingText');
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var tipText = document.getElementById('tipText');
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function sendToApp(action, code) {
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if (window.uni && window.uni.postMessage) {
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window.uni.postMessage({ data: { action: action, code: code || '' } });
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}
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}
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function closeCamera() {
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try { Quagga.stop(); } catch(e) {}
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sendToApp('close');
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}
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closeBtn.addEventListener('click', closeCamera);
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function startQuagga() {
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Quagga.init({
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inputStream: {
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name: 'Live',
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type: 'LiveStream',
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target: document.querySelector('#scanner-container'),
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constraints: {
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width: { ideal: 640 },
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height: { ideal: 480 },
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facingMode: 'environment'
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}
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},
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decoder: {
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readers: [
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'ean_reader',
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'ean_8_reader',
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'upc_reader',
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'code_128_reader',
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'code_39_reader'
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],
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debug: false
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},
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locator: {
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halfSample: false,
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patchSize: 'large'
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},
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numOfWorkers: 2,
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frequency: 5
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}, function(err) {
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if (err) {
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loadingText.innerText = '摄像头启动失败，请检查权限';
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console.error('Quagga init error:', err);
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setTimeout(function() {
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loadingText.innerText = '点击返回';
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closeBtn.addEventListener('click', function() {
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sendToApp('close');
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});
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}, 2000);
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return;
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}
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loadingText.style.display = 'none';
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Quagga.start();
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});
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}
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Quagga.onDetected(function(result) {
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if (detected) return;
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var code = result && result.codeResult && result.codeResult.code;
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if (!code) return;
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// ISBN 通常是 13 位数字，但也接受其他格式
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code = code.replace(/\D/g, '');
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if (code.length === 13 || code.length === 12 || code.length === 10) {
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detected = true;
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tipText.innerText = '识别成功';
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Quagga.stop();
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setTimeout(function() {
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sendToApp('scanned', code);
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}, 300);
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}
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});
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// 等待 UniApp 桥接就绪后启动
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function waitForBridge() {
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if (window.uni && window.uni.postMessage) {
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startQuagga();
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} else {
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document.addEventListener('UniAppJSBridgeReady', function() {
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startQuagga();
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});
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// 降级：2秒后直接启动
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setTimeout(function() {
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if (typeof Quagga !== 'undefined') {
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startQuagga();
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}
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}, 2000);
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}
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}
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// 页面加载完成后启动
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if (document.readyState === 'complete') {
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waitForBridge();
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} else {
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window.addEventListener('load', waitForBridge);
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}
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// 页面不可见时停止摄像头节省资源（可选）
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document.addEventListener('visibilitychange', function() {
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if (document.hidden) {
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try { Quagga.stop(); } catch(e) {}
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}
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});
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</script>
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</body>
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</html>
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@ -1,47 +1,26 @@
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<template>
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<view class="page">
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<barcode class="barcode" ref="barcode" autostart="true" background="#00000000" frameColor="#00000000" scanbarColor="#00000000" :filters="[1,2,5,6,7,8,9,10,11]" @marked="onMarked" @error="onError"></barcode>
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<!-- 返回按钮 -->
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<view class="close-btn" @click="goBack">
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<text class="close-icon">✕</text>
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</view>
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<!-- 底部提示 -->
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<view class="tip">
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<text class="tip-text">对准条码自动识别</text>
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</view>
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<web-view src="/hybrid/html/scanner.html" @message="handleMessage"></web-view>
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</view>
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</template>
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<script>
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export default {
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data() {
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return {
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scanned: false
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}
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},
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onUnload() {
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this.$refs.barcode && this.$refs.barcode.cancel()
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return {}
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},
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methods: {
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onMarked(e) {
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if (this.scanned) return
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this.scanned = true
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const code = e.detail && (e.detail.message || '')
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if (code && code.length === 13) {
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handleMessage(e) {
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const data = e.detail && e.detail.data && e.detail.data[0]
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if (!data) return
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const action = data.action || ''
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if (action === 'scanned' && data.code) {
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// 发送结果回上传页面
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uni.$emit('scan-isbn-result', code)
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uni.$emit('scan-isbn-result', data.code)
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uni.navigateBack()
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} else if (action === 'close') {
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uni.navigateBack()
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} else {
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this.scanned = false
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}
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},
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onError() {
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uni.showToast({ title: '扫码异常', icon: 'none' })
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uni.navigateBack()
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},
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goBack() {
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this.$refs.barcode && this.$refs.barcode.cancel()
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uni.navigateBack()
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}
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}
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}
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@ -50,41 +29,6 @@
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<style>
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.page {
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flex: 1;
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}
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.barcode {
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width: 750rpx;
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flex: 1;
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}
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.close-btn {
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position: fixed;
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top: 60rpx;
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left: 30rpx;
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width: 60rpx;
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height: 60rpx;
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border-radius: 50%;
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background-color: rgba(255,255,255,0.2);
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display: flex;
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align-items: center;
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justify-content: center;
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z-index: 999;
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}
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.close-icon {
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color: #ffffff;
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font-size: 36rpx;
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}
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.tip {
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position: fixed;
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bottom: 120rpx;
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left: 0;
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right: 0;
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text-align: center;
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z-index: 999;
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}
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.tip-text {
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color: #ffffff;
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font-size: 28rpx;
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background-color: rgba(0,0,0,0.5);
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padding: 12rpx 30rpx;
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border-radius: 40rpx;
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background-color: #000;
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}
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</style>
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