我写了下面的代码。我的服务器上有一个有效的 json 文件，如下所示:
[
{
"data": [
{
"y": 1.0,
"x": 1451936340.0
},
{
"y": 1.0,
"x": 1451936400.0
},
{
"y": 1.0,
"x": 1451936460.0
}
]
}
]
我有以下代码。我正在尝试使用 renderer: 'multi' 绘制折线图并在折线图上叠加点，但遇到了很多障碍。我是 JS 新手，我不明白我在哪里搞砸了。我想我的 jQuery.ajax 函数中需要一个回调函数，但我不确定。我感谢任何帮助。
<html>
<head>
<!-- css -->
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/rickshaw/1.5.1/rickshaw.min.css">
<!-- js -->
<script src="https://code.jquery.com/jquery-1.11.3.min.js"></script>
<script src="https://code.jquery.com/ui/1.11.4/jquery-ui.min.js"></script>
<script>
jQuery.noConflict();
</script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.10/d3.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/rickshaw/1.5.1/rickshaw.min.js"></script>
</head>
<body>
<div style="margin:10px auto;width:auto;" id="chart_container">
<div id="chart"></div>
<div id="slider"></div>
<script>
var json = jQuery.ajax({
'url': "/assets/json/data.json",
'success': function(json) {
console.log(json[0].data);
}
});
var graph = new Rickshaw.Graph( {
element: document.getElementById("chart"),
renderer: 'multi',
height: 200,
width: 400,
series: [
{
name: "series 1",
data: json[0].data,
color: "rgba(255, 0, 0, 0.4)",
renderer: "line"
}, {
name: "series 2",
data: json[0].data,
color: "rgba(255, 0, 0, 0.4)",
renderer: "scatterplot"
}
]
} );
graph.render();
var slider = new Rickshaw.Graph.RangeSlider.Preview( {
graph: graph,
element: document.querySelector('#slider')
} );
var detail = new Rickshaw.Graph.HoverDetail( {
graph: graph
} );
graph.render();
</script>
</div>
</body>
最佳答案
这里有一些我会改变的事情。
1.) jQuery.ajax 返回一个 promise，而不是原始数据本身，因此 var json = jQuery.ajax(...) 不会分配 json 您期望的值。
2.) 传递success回调函数以正确访问服务器返回的JSON
3.) 仅调用 graph.render() 一次。
Javascript
jQuery.ajax({
'url': "/assets/json/data.json",
'success': renderGraph // callback for ajax success
});
// wrap graph creation logic in a function to be used as a callback
function renderGraph(json) {
var graph = new Rickshaw.Graph({
element: document.getElementById("chart"),
renderer: 'multi',
height: 200,
width: 400,
series: [{
name: "series 1",
data: json[0].data,
color: "rgba(255, 0, 0, 0.4)",
renderer: "line"
}, {
name: "series 2",
data: json[0].data,
color: "rgba(255, 0, 0, 0.4)",
renderer: "scatterplot"
}]
});
// remove this, only render once at the end
// graph.render();
var slider = new Rickshaw.Graph.RangeSlider.Preview({
graph: graph,
element: document.querySelector('#slider')
});
var detail = new Rickshaw.Graph.HoverDetail({
graph: graph
});
graph.render();
}
关于javascript - jQuery.ajax 和 Rickshaw - 回调函数？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/34617442/