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我是HTML/Javascript語言的新手。在輸入字段獲得quaggaJS條碼結果
我想實現quaggaJS條碼掃描器使用實時流到我的HTML頁面。它的工作正常，但我想要的是在輸入字段上獲得結果。
下面是我輸入字段：
<input class="form-control" type="number" name="id" required autofocus>
這是quaggaJS live_w_locator.js文件：
$(function() {
var resultCollector = Quagga.ResultCollector.create({
capture: true,
capacity: 20,
blacklist: [{
code: "WIWV8ETQZ1", format: "code_93"
}, {
code: "EH3C-%GU23RK3", format: "code_93"
}, {
code: "O308SIHQOXN5SA/PJ", format: "code_93"
}, {
code: "DG7Q$TV8JQ/EN", format: "code_93"
}, {
code: "VOFD1DB5A.1F6QU", format: "code_93"
}, {
code: "4SO64P4X8 U4YUU1T-", format: "code_93"
}],
filter: function(codeResult) {
// only store results which match this constraint
// e.g.: codeResult
return true;
}
});
var App = {
init: function() {
var self = this;
Quagga.init(this.state, function(err) {
if (err) {
return self.handleError(err);
}
//Quagga.registerResultCollector(resultCollector);
App.attachListeners();
App.checkCapabilities();
Quagga.start();
});
},
handleError: function(err) {
console.log(err);
},
checkCapabilities: function() {
var track = Quagga.CameraAccess.getActiveTrack();
var capabilities = {};
if (typeof track.getCapabilities === 'function') {
capabilities = track.getCapabilities();
}
this.applySettingsVisibility('zoom', capabilities.zoom);
this.applySettingsVisibility('torch', capabilities.torch);
},
updateOptionsForMediaRange: function(node, range) {
console.log('updateOptionsForMediaRange', node, range);
var NUM_STEPS = 6;
var stepSize = (range.max - range.min)/NUM_STEPS;
var option;
var value;
while (node.firstChild) {
node.removeChild(node.firstChild);
}
for (var i = 0; i <= NUM_STEPS; i++) {
value = range.min + (stepSize * i);
option = document.createElement('option');
option.value = value;
option.innerHTML = value;
node.appendChild(option);
}
},
applySettingsVisibility: function(setting, capability) {
// depending on type of capability
if (typeof capability === 'boolean') {
var node = document.querySelector('input[name="settings_' + setting + '"]');
if (node) {
node.parentNode.style.display = capability ? 'block' : 'none';
}
return;
}
if (window.MediaSettingsRange && capability instanceof window.MediaSettingsRange) {
var node = document.querySelector('select[name="settings_' + setting + '"]');
if (node) {
this.updateOptionsForMediaRange(node, capability);
node.parentNode.style.display = 'block';
}
return;
}
},
initCameraSelection: function(){
var streamLabel = Quagga.CameraAccess.getActiveStreamLabel();
return Quagga.CameraAccess.enumerateVideoDevices()
.then(function(devices) {
function pruneText(text) {
return text.length > 30 ? text.substr(0, 30) : text;
}
var $deviceSelection = document.getElementById("deviceSelection");
while ($deviceSelection.firstChild) {
$deviceSelection.removeChild($deviceSelection.firstChild);
}
devices.forEach(function(device) {
var $option = document.createElement("option");
$option.value = device.deviceId || device.id;
$option.appendChild(document.createTextNode(pruneText(device.label || device.deviceId || device.id)));
$option.selected = streamLabel === device.label;
$deviceSelection.appendChild($option);
});
});
},
attachListeners: function() {
var self = this;
self.initCameraSelection();
$(".controls").on("click", "button.stop", function(e) {
e.preventDefault();
Quagga.stop();
self._printCollectedResults();
});
$(".controls .reader-config-group").on("change", "input, select", function(e) {
e.preventDefault();
var $target = $(e.target),
value = $target.attr("type") === "checkbox" ? $target.prop("checked") : $target.val(),
name = $target.attr("name"),
state = self._convertNameToState(name);
console.log("Value of "+ state + " changed to " + value);
self.setState(state, value);
});
},
_printCollectedResults: function() {
var results = resultCollector.getResults(),
$ul = $("#result_strip ul.collector");
results.forEach(function(result) {
var $li = $('<li><div class="thumbnail"><div class="imgWrapper"><img /></div><div class="caption"><h4 class="code"></h4></div></div></li>');
$li.find("img").attr("src", result.frame);
$li.find("h4.code").html(result.codeResult.code + " (" + result.codeResult.format + ")");
$ul.prepend($li);
});
},
_accessByPath: function(obj, path, val) {
var parts = path.split('.'),
depth = parts.length,
setter = (typeof val !== "undefined") ? true : false;
return parts.reduce(function(o, key, i) {
if (setter && (i + 1) === depth) {
if (typeof o[key] === "object" && typeof val === "object") {
Object.assign(o[key], val);
} else {
o[key] = val;
}
}
return key in o ? o[key] : {};
}, obj);
},
_convertNameToState: function(name) {
return name.replace("_", ".").split("-").reduce(function(result, value) {
return result + value.charAt(0).toUpperCase() + value.substring(1);
});
},
detachListeners: function() {
$(".controls").off("click", "button.stop");
$(".controls .reader-config-group").off("change", "input, select");
},
applySetting: function(setting, value) {
var track = Quagga.CameraAccess.getActiveTrack();
if (track && typeof track.getCapabilities === 'function') {
switch (setting) {
case 'zoom':
return track.applyConstraints({advanced: [{zoom: parseFloat(value)}]});
case 'torch':
return track.applyConstraints({advanced: [{torch: !!value}]});
}
}
},
setState: function(path, value) {
var self = this;
if (typeof self._accessByPath(self.inputMapper, path) === "function") {
value = self._accessByPath(self.inputMapper, path)(value);
}
if (path.startsWith('settings.')) {
var setting = path.substring(9);
return self.applySetting(setting, value);
}
self._accessByPath(self.state, path, value);
console.log(JSON.stringify(self.state));
App.detachListeners();
Quagga.stop();
App.init();
},
inputMapper: {
inputStream: {
constraints: function(value){
if (/^(\d+)x(\d+)$/.test(value)) {
var values = value.split('x');
return {
width: {min: parseInt(values[0])},
height: {min: parseInt(values[1])}
};
}
return {
deviceId: value
};
}
},
numOfWorkers: function(value) {
return parseInt(value);
},
decoder: {
readers: function(value) {
if (value === 'ean_extended') {
return [{
format: "ean_reader",
config: {
supplements: [
'ean_5_reader', 'ean_2_reader'
]
}
}];
}
return [{
format: value + "_reader",
config: {}
}];
}
}
},
state: {
inputStream: {
type : "LiveStream",
constraints: {
width: {min: 640},
height: {min: 480},
facingMode: "environment",
aspectRatio: {min: 1, max: 2}
}
},
locator: {
patchSize: "medium",
halfSample: true
},
numOfWorkers: 2,
frequency: 10,
decoder: {
readers : [{
format: "code_128_reader",
config: {}
}]
},
locate: true
},
lastResult : null
};
App.init();
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});
}
}
});
Quagga.onDetected(function(result) {
var code = result.codeResult.code;
if (App.lastResult !== code) {
App.lastResult = code;
var $node = null, canvas = Quagga.canvas.dom.image;
$node = $('<li><div class="thumbnail"><div class="imgWrapper"><img /></div><div class="caption"><h4 class="code"></h4></div></div></li>');
$node.find("img").attr("src", canvas.toDataURL());
$node.find("h4.code").html(code);
$("#result_strip ul.thumbnails").prepend($node);
}
});
});
感謝您的幫助...謝謝您
它工作@ A2zbollywood –