问题描述
var dataprofit = [];
var databalance = [];
var datastops = [];
var aline = [];
var profit = [];
var balance = [];
var stop = [];
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
var jresp=JSON.parse(this.responseText);
for (i=0; i<jresp.length; i++) {
aline = jresp[i]
profit = [aline['ticket'],aline['profit']];
balance = [aline['ticket'],aline['balance']];
stop = [aline['ticket'],aline['stop']];
dataprofit.push(profit);
databalance.push(balance);
datastops.push(stop);
}
// EquityCounter.update(jresp["equity"]);
}
};
xhttp.open("GET","https://dashboard.luxTradingfirm.com/getvalues/1234",true);
xhttp.send(null);
var optionsSeries = {
yaxis: { min: 14000,max: 16000 },xaxis: { show: false },grid: {
tickColor: '#dddddd',borderWidth: 0,},legend: {position: 'sw'},colors: ['#008000','rgba(65,139,202,0.5)','#FF0000']
};
var dataset = [
{
label: "Succeed",data: dataprofit,series: { shadowSize: 0 },lines: { fill: false },{
label: "Balance",data: databalance,series: { shadowSize: 1 },lines: { fill: true,fillColor: { colors: [{ opacity: 1 },{ opacity: 0.1 }] } },{
label: "Fail",data: datastops,}
];
$.plot($('#realtimechart'),dataset,optionsSeries);
此代码从链接中读取一个 json 对象,然后将其放入 3 个不同的数组中,使用 Flot 图表的选项将 3 个数组重新组合为 1。但是,Flotchart 不会绘制。如果我更改手动编码数组的数组(在数据集数组中),它可以完美运行。怎么了?
解决方法
数组和绘图函数的组装必须在 xhttp.onreadystatechange = function() {}
否则它将组装空数组,因为 API 调用尚未完成。