我正在尝试一种方法来扫描我打印在纸上的 irl 条形码以扫描到我的 php 网站。只有当我在手机上使用该网站时，我才能在他扫描条形码并将其发送到我的代码时打开手机摄像头并扫描条形码。该代码可以检查我的数据库等。
我找到了一个漂亮的插件，叫做QuaggaJS，我一直在玩它，现在我比拍照更进一步，让它读取条形码并将其发送到我的代码，但我想让它扫描同时我把相机放在条形码前面，这样它就会把相机关在自己身上。这是一个示例（在桌面上它会要求打开网络摄像头的权限）。
最后，我想要一个按钮，在我的网站上单击它可以打开我的相机，这样我就可以扫描代码，当他找到条形码时，他会关闭相机并向我显示具有此条形码的产品的信息。有人可以帮助我吗？
这是我使用和玩过的一些代码。（仅适用于拍照）
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<script type="text/javascript" src="includes/js/quagga.min.js"></script>
<link href="https://use.fontawesome.com/releases/v5.0.8/css/all.css" rel="stylesheet">
<script type="text/javascript" src="includes/js/quagga.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
<style>
#interactive.viewport {position: relative; width: 100%; height: auto; overflow: hidden; text-align: center;}
#interactive.viewport > canvas, #interactive.viewport > video {max-width: 100%;width: 100%;}
canvas.drawing, canvas.drawingBuffer {position: absolute; left: 0; top: 0;}
</style>
<script type="text/javascript">
$(function() {
// Create the QuaggaJS config object for the live stream
var liveStreamConfig = {
inputStream: {
type : "LiveStream",
constraints: {
width: {min: 640},
height: {min: 480},
aspectRatio: {min: 1, max: 100},
facingMode: "environment" // or "user" for the front camera
}
},
locator: {
patchSize: "medium",
halfSample: true
},
numOfWorkers: (navigator.hardwareConcurrency ? navigator.hardwareConcurrency : 4),
decoder: {
"readers":[
{"format":"code_128_reader","config":{}}
]
},
locate: true
};
// The fallback to the file API requires a different inputStream option.
// The rest is the same
var fileConfig = $.extend(
{},
liveStreamConfig,
{
inputStream: {
size: 800
}
}
);
// Start the live stream scanner when the modal opens
$('#livestream_scanner').on('shown.bs.modal', function (e) {
Quagga.init(
liveStreamConfig,
function(err) {
if (err) {
$('#livestream_scanner .modal-body .error').html('<div class="alert alert-danger"><strong><i class="fa fa-exclamation-triangle"></i> '+err.name+'</strong>: '+err.message+'</div>');
Quagga.stop();
return;
}
Quagga.start();
}
);
});
// Make sure, QuaggaJS draws frames an lines around possible
// barcodes on the live stream
Quagga.onProcessed(function(result) {
var drawingCtx = Quagga.canvas.ctx.overlay,
drawingCanvas = Quagga.canvas.dom.overlay;
if (result) {
if (result.boxes) {
drawingCtx.clearRect(0, 0, parseInt(drawingCanvas.getAttribute("width")), parseInt(drawingCanvas.getAttribute("height")));
result.boxes.filter(function (box) {
return box !== result.box;
}).forEach(function (box) {
Quagga.ImageDebug.drawPath(box, {x: 0, y: 1}, drawingCtx, {color: "green", lineWidth: 2});
});
}
if (result.box) {
Quagga.ImageDebug.drawPath(result.box, {x: 0, y: 1}, drawingCtx, {color: "#00F", lineWidth: 2});
}
if (result.codeResult && result.codeResult.code) {
Quagga.ImageDebug.drawPath(result.line, {x: 'x', y: 'y'}, drawingCtx, {color: 'red', lineWidth: 3});
}
}
});
// Once a barcode had been read successfully, stop quagga and
// close the modal after a second to let the user notice where
// the barcode had actually been found.
Quagga.onDetected(function(result) {
if (result.codeResult.code){
$('#scanner_input').val(result.codeResult.code);
Quagga.stop();
setTimeout(function(){ $('#livestream_scanner').modal('hide'); }, 1000);
}
});
// Stop quagga in any case, when the modal is closed
$('#livestream_scanner').on('hide.bs.modal', function(){
if (Quagga){
Quagga.stop();
}
});
// Call Quagga.decodeSingle() for every file selected in the
// file input
$("#livestream_scanner input:file").on("change", function(e) {
if (e.target.files && e.target.files.length) {
Quagga.decodeSingle($.extend({}, fileConfig, {src: URL.createObjectURL(e.target.files[0])}), function(result) {alert(result.codeResult.code);});
}
});
});
</script>
</head>
<body>
<input id="scanner_input" class="form-control" style="width:20%;" placeholder="Barcode" type="text" />
<button class="btn btn-default" type="button" data-toggle="modal" data-target="#livestream_scanner"><i class="fas fa-barcode"></i> Scan</button>
<div class="modal" id="livestream_scanner">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
<h4 class="modal-title">Barcode Scanner</h4>
</div>
<div class="modal-footer">
<label class="btn btn-default pull-left">
<i class="fa fa-camera"></i> Use camera app
<input type="file" accept="image/*;capture=camera" capture="camera" class="hidden" />
</label>
<button type="button" class="btn btn-primary" data-dismiss="modal">Close</button>
</div>
</div><!-- /.modal-content -->
</div><!-- /.modal-dialog -->
</div><!-- /.modal -->
</body>
</html>
最好的祝福