我正在使用 ThingSpeak API 检索数据。我想在融合图表中显示数据。如何在图表中显示动态数据？此代码适用于其他第 3 方 API，但不适用于此 API。
示例数据:
172.70
API:
https://api.thingspeak.com/channels/23037xxx/fields/field1/last?api_key=EG628M4J9SP76xxx
<script>
FusionCharts.ready(function() {
LoadChart();
});
function LoadChart() {
$.ajax({
url: 'https://api.thingspeak.com/channels/230xxx/fields/field1/last?api_key=EG628M4J9SP76xxx', // local address
type: 'GET',
crossDomain: true,
success: function(data) {
if (data.success) {
var chlorine = data;
var phfusioncharts = new FusionCharts({
type: 'angulargauge',
renderAt: 'ph-container',
width: '450',
height: '300',
dataFormat: 'json',
dataSource: {
"chart": {
"caption": "Chlorine ",
"lowerLimit": "0",
"upperLimit": "14",
"showValue": "1",
"valueBelowPivot": "1",
"theme": "fint"
},
"colorRange": {
"color": [{
"minValue": "0",
"maxValue": "5",
"code": "#6baa01"
}, {
"minValue": "5",
"maxValue": "10",
"code": "#f8bd19"
}, {
"minValue": "10",
"maxValue": "14",
"code": "#e44a00"
}]
},
"dials": {
"dial": [{
"value": chlorine
}]
}
}
});
phfusioncharts.render();
}
}
});
}
</script>
</head>
<body>
<table class="">
<tr>
<td>
<div id="ph-container" style="float:left;"></div>
</td>
</tr>
</table>
最佳答案
您不需要检查data.success是否成功。您的 api 仅响应一个浮点值。所以 data.success 是未定义的。它永远不会进入 if 条件。
查看演示:http://jsfiddle.net/x5FBh/1201/
JS:
FusionCharts.ready(function () {
LoadChart();
});
function LoadChart() {
$.ajax({
url: 'https://api.thingspeak.com/channels/230372/fields/field1/last?api_key=EG628M4J9SP769UT', // local address
type: 'GET',
crossDomain: true,
success: function (data) {
console.log('xhr success')
//if (data.success) {
console.log("success");
var chlorine = data;
var phfusioncharts = new FusionCharts({
type: 'angulargauge',
renderAt: 'ph-container',
width: '450',
height: '300',
dataFormat: 'json',
dataSource: {
"chart": {
"caption": "Chlorine ",
"lowerLimit": "0",
"upperLimit": "14",
"showValue": "1",
"valueBelowPivot": "1",
"theme": "fint"
},
"colorRange": {
"color": [{
"minValue": "0",
"maxValue": "5",
"code": "#6baa01"
}, {
"minValue": "5",
"maxValue": "10",
"code": "#f8bd19"
}, {
"minValue": "10",
"maxValue": "14",
"code": "#e44a00"
}]
},
"dials": {
"dial": [{
"value": "22"
}]
}
}
});
phfusioncharts.render();
//}
}
});
}
关于javascript - 无法从 API 获取数据以在图表中显示数据，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/42392700/