使用 Javascript 中的键循环遍历 JSON responseText 数组
使用 JavaScript。我正在尝试循环使用 JSON 编码的数组。以下是数组的示例：
{"test1":"some info","test2":"more info","test3":"more stuff"}
在每个循环内，我检查是否存在带有键名称的 DIV id。
<div id="test1"></div>
<div id="test2"></div>
<div id="test3"></div>
我正在使用 for() 循环，但无法让它工作。如果我删除 for() 循环，如果我只搜索 1 个 DIV id，它就可以正常工作。
for(var key in responseText)
这是脚本。有谁知道如何使用数组键作为 DIV id 的名称来循环responseText 中的数组？
<script>
function loadInfo() {
var req = new Request({
method: 'get',
url: 'getinfo.php,
noCache: true,
onRequest: function() {
for (var key in responseText) {
if (document.getElementById(key)) {
$(key).set('html', 'Loading');
}
}
},
onComplete: function(responseText, responseHtml) {
if (JSON.decode(responseText) != null) {
var data = JSON.decode(responseText);
for (var key in responseText) {
if (document.getElementById(key)) {
$(key).set('html', data[key]);
}
}
}
},
onFailure: function() {
for (var key in responseText) {
if (document.getElementById(key)) {
$(key).set('html', '-');
}
}
}
}).send();
}
window.addEvent('domready', function() {
loadInfo();
});
</script>
Using Javascript. I'm trying to loop through an array encoded with JSON. Here is a sample of the array:
{"test1":"some info","test2":"more info","test3":"more stuff"}
Inside each loop I am checking to see if a DIV id exists with the name of the keys.
<div id="test1"></div>
<div id="test2"></div>
<div id="test3"></div>
I'm using a for() loop, but I can't get it to work. If I remove the for() loop it works just fine if I search for only 1 DIV id.
for(var key in responseText)
Here is the script. Does anyone know how I can loop through the array from responseText using the array keys as the names of the DIV id's?
<script>
function loadInfo() {
var req = new Request({
method: 'get',
url: 'getinfo.php,
noCache: true,
onRequest: function() {
for (var key in responseText) {
if (document.getElementById(key)) {
$(key).set('html', 'Loading');
}
}
},
onComplete: function(responseText, responseHtml) {
if (JSON.decode(responseText) != null) {
var data = JSON.decode(responseText);
for (var key in responseText) {
if (document.getElementById(key)) {
$(key).set('html', data[key]);
}
}
}
},
onFailure: function() {
for (var key in responseText) {
if (document.getElementById(key)) {
$(key).set('html', '-');
}
}
}
}).send();
}
window.addEvent('domready', function() {
loadInfo();
});
</script>
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评论（3）
在迭代键之前，您必须解码 JSON。因此，您所说的：
将其替换为：
假设
此外，您的某些回调函数未指定
responseText作为参数。如果您想为每个回调访问此内容，则必须显式包含responseText作为参数。示例：应该是：
You have to decode the JSON before you iterate over the keys. So, where you say:
replace that with:
assuming
Also, some of your callback functions don't specify
responseTextas a parameter. If you want to access this for each callback, you have to explicitly includeresponseTextas a parameter. Example:should be:
我认为问题是您使用了错误的变量名称。
应读取
请注意，它读取的是
data，而不是in之后的responseText。I think the problem is that you're using the wrong variable name.
Should read
Note that instead of
responseTextafterin, it readsdata.您确定不需要
JSON.parse吗？这会将 JSON 响应解析为一个 javascript 对象，您可以使用for/in对其进行操作。另外，您在
url:之后缺少右引号Are you sure you don't want
JSON.parse? This would parse the JSON response into a javascript object that you can use thefor/inagainst.Also, you're missing a closing quotation mark after the
url: