使用JavaScript将二维码生成到输入字段中的问题
使用JavaScript将二维码生成到输入字段中的问题
提问于 2018-12-03 17:48:09
JavaScript代码和HTML码
我正在尝试将生成的二维码的值作为输入文本保存到我的SQLite数据库中，无法推送二维码的值
var resultDiv;
document.addEventListener("deviceready", init, false);
function init() {
document.querySelector("#startScan").
addEventListener("touchend", startScan, false);
resultDiv = document.querySelector("#results");//works in <p id="results"></p>
resultDiv = document.querySelector('#text4');//wont work at all <input id="text4" type="text" placeholder="Book Info"/>
}
function startScan() {
cordova.plugins.barcodeScanner.scan(
function (result) {
var s = result.text.split('|');
result.format;
result.cancelled;
resultDiv.innerHTML = s;
},
function (error) {
alert("Scanning failed: " + error);
}
);
}
JavaScript codes and HTML codes<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>qrBorrowers</title>
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<script type="text/javascript" src="cordova.js"></script>
<nav>
<div class="topnav">
<a href="add.html">Add</a>
<a href="borrow.html">Borrow</a>
<a href="return.html">Return</a>
<a href="generate.html">QR code</a>
</div>
</nav>
<Label>
<h1> Borrow a Book </h1>
</Label>
<div class="borrow">
<input id="text1" type="text" placeholder="Borrower Number" onfocus="this.value=''"/>
<input id="text2" type="text" placeholder="Borrower Last Name" onfocus="this.value=''" />
<input id="text3" type="text" placeholder="Borrower First Name" onfocus="this.value=''" />
<input id="text4" type="text" placeholder="Book Info"/>
<input id="text6" type="date" placeholder="Date Borrowed" />
<br>
</div>
<div class="borrow">
<p id="results"></p>
<button id="startScan">Start Scan</button>
<button id="savedb">Save </button>
</div>
<script type="text/javascript" src="js/scanQR.js"></script>
</body>
</html>
回答 2
Stack Overflow用户
回答已采纳
发布于 2018-12-04 15:45:00
使用内置HTML，它不会将生成的二维码保存到输入框中。您需要将innerHTML更改为value，以便在输入框中保存该值，以便在表单提交时将其作为value保存在数据库中。
var resultDiv;
document.addEventListener("deviceready", init, false);
function init() {
document.querySelector("#startScan").
addEventListener("touchend", startScan, false);
resultDiv = document.querySelector("#results");//works in <p id="results"></p>
resultDiv = document.querySelector('#text4');//wont work at all <input id="text4" type="text" placeholder="Book Info"/>
}
function startScan() {
cordova.plugins.barcodeScanner.scan(
function (result) {
var s = result.text.split('|');
result.format;
result.cancelled;
resultDiv.value = s;
},
function (error) {
alert("Scanning failed: " + error);
}
);
}
JavaScript codes and HTML codes<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>qrBorrowers</title>
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<script type="text/javascript" src="cordova.js"></script>
<nav>
<div class="topnav">
<a href="add.html">Add</a>
<a href="borrow.html">Borrow</a>
<a href="return.html">Return</a>
<a href="generate.html">QR code</a>
</div>
</nav>
<Label>
<h1> Borrow a Book </h1>
</Label>
<div class="borrow">
<input id="text1" type="text" placeholder="Borrower Number" onfocus="this.value=''"/>
<input id="text2" type="text" placeholder="Borrower Last Name" onfocus="this.value=''" />
<input id="text3" type="text" placeholder="Borrower First Name" onfocus="this.value=''" />
<input id="text4" type="text" placeholder="Book Info"/>
<input id="text6" type="date" placeholder="Date Borrowed" />
<br>
</div>
<div class="borrow">
<p id="results"></p>
<button id="startScan">Start Scan</button>
<button id="savedb">Save </button>
</div>
<script type="text/javascript" src="js/scanQR.js"></script>
</body>
</html>
Stack Overflow用户
发布于 2018-12-04 15:41:54
要保存输入框中的值，不应该使用"resultDiv.innerHTML = s“，而应该使用"resultDiv.value =s”，它会将代码保存到输入框中，您可以使用该输入框将代码保存到SQLite数据库中。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/53591115
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