我从这个link得到的示例工作正常,尝试使其更加动态,我将有多个按钮并将按钮文本或ID传递给function doHelloWorld()
这是我的尝试
<!doctype html>
<html>
<head>
<script src="https://www.dropbox.com/static/api/dropbox-datastores-1.0-latest.js"></script>
<link rel="stylesheet" href="style.css">
</head>
<body>
<center>
<button id="writeButton1"><font size="12">text one</font></button><br>
<button id="writeButton2"><font size="12">text two</font></button><br>
<button id="writeButton3"><font size="12">text three</font></button>
</center>
<script>
var client = new Dropbox.Client({ key: 'YOUR-APP-KEY-HERE' });
// Try to complete OAuth flow.
client.authenticate({ interactive: false }, function (error, client) {
if (error) {
alert('Error: ' + error);
}
});
for (var i = 1; i <= 3; i++){
document.getElementById('writeButton' + i).onclick = function () {
client.authenticate(function (error, client) {
if (error) {
alert('Error: ' + error);
} else {
doHelloWorld(this.id);
}
});
}
}
function doHelloWorld(i) {
client.writeFile('hello.txt', 'Hello, World!' + i, function (error) {
if (error) {
alert('Error: ' + error);
} else {
alert('File written successfully!');
}
});
}
</script>
答案 0 :(得分:2)
authenticate
回调函数中的执行上下文不再是按钮对象。最简单的解决方法是在本地变量中保存引用正确的this
并使用它:
for (var i = 1; i <= 3; i++) {
document.getElementById('writeButton' + i).onclick = function () {
var button = this;
client.authenticate(function (error, client) {
if (error) {
alert('Error: ' + error);
} else {
doHelloWorld(button.id);
}
});
}
}