扫码页:改用WebView+quagga2 JS解码 全屏无蒙版实时条码识别

This commit is contained in:
97694732@qq.com 2026-06-04 16:07:30 +08:00
parent 81a3de3177
commit 8ca9ac9ff9
2 changed files with 209 additions and 67 deletions

198
hybrid/html/scanner.html Normal file
View File

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

View File

@ -1,47 +1,26 @@
<template> <template>
<view class="page"> <view class="page">
<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> <web-view src="/hybrid/html/scanner.html" @message="handleMessage"></web-view>
<!-- 返回按钮 -->
<view class="close-btn" @click="goBack">
<text class="close-icon">✕</text>
</view>
<!-- 底部提示 -->
<view class="tip">
<text class="tip-text">对准条码自动识别</text>
</view>
</view> </view>
</template> </template>
<script> <script>
export default { export default {
data() { data() {
return { return {}
scanned: false
}
},
onUnload() {
this.$refs.barcode && this.$refs.barcode.cancel()
}, },
methods: { methods: {
onMarked(e) { handleMessage(e) {
if (this.scanned) return const data = e.detail && e.detail.data && e.detail.data[0]
this.scanned = true if (!data) return
const code = e.detail && (e.detail.message || '') const action = data.action || ''
if (code && code.length === 13) { if (action === 'scanned' && data.code) {
// 发送结果回上传页面 // 发送结果回上传页面
uni.$emit('scan-isbn-result', code) uni.$emit('scan-isbn-result', data.code)
uni.navigateBack()
} else if (action === 'close') {
uni.navigateBack() uni.navigateBack()
} else {
this.scanned = false
} }
},
onError() {
uni.showToast({ title: '扫码异常', icon: 'none' })
uni.navigateBack()
},
goBack() {
this.$refs.barcode && this.$refs.barcode.cancel()
uni.navigateBack()
} }
} }
} }
@ -50,41 +29,6 @@
<style> <style>
.page { .page {
flex: 1; flex: 1;
} background-color: #000;
.barcode {
width: 750rpx;
flex: 1;
}
.close-btn {
position: fixed;
top: 60rpx;
left: 30rpx;
width: 60rpx;
height: 60rpx;
border-radius: 50%;
background-color: rgba(255,255,255,0.2);
display: flex;
align-items: center;
justify-content: center;
z-index: 999;
}
.close-icon {
color: #ffffff;
font-size: 36rpx;
}
.tip {
position: fixed;
bottom: 120rpx;
left: 0;
right: 0;
text-align: center;
z-index: 999;
}
.tip-text {
color: #ffffff;
font-size: 28rpx;
background-color: rgba(0,0,0,0.5);
padding: 12rpx 30rpx;
border-radius: 40rpx;
} }
</style> </style>