将外部JSON加载到ChartJs中
我是一个新手，当使用库来绘制JavaScript中的图表/我刚开始尝试使用Chartjs时，我一直无法使用getJson或其他任何东西来加载我的json对象并替换标签和数据。 我之前使用过HighCharts，与此相比非常简单。 另外，我如何将它放入Angular中的指令并显示它。
https://jsfiddle.net/0u9Lpttx/1/
的index.html
data.json
[ { "timestamp": "Monday", "original_tweet": "756", "retweets": "345", "shared": "34", "quoted": "14" }, { "timestamp": "Tuesday", "original_tweet": "756", "retweets": "345", "shared": "34", "quoted": "14" }, { "timestamp": "Wednesday", "original_tweet": "756", "retweets": "345", "shared": "34", "quoted": "14" } ]
chartJsControl.js
var test = []; $.getJSON("data.json", function (json) { test.push(json[i].timestamp); }); var data = { labels: test, datasets: [ { label: "My First dataset", fillColor: "rgba(220,220,220,0.5)", strokeColor: "rgba(220,220,220,0.8)", highlightFill: "rgba(220,220,220,0.75)", highlightStroke: "rgba(220,220,220,1)", data: [65, 59, 80, 81, 56, 55, 40] }, { label: "My Second dataset", fillColor: "rgba(151,187,205,0.5)", strokeColor: "rgba(151,187,205,0.8)", highlightFill: "rgba(151,187,205,0.75)", highlightStroke: "rgba(151,187,205,1)", data: [28, 48, 40, 19, 86, 27, 90] } ] }; var ctx = document.getElementById("myChart").getContext("2d"); ctx.canvas.width = 1000; ctx.canvas.height = 800; var myChart = new Chart(ctx).Bar(data);
如果你想使用data.json中返回的JSON，你需要在回调函数中这样做：
$.getJSON("data.json", function (json) { // will generate array with ['Monday', 'Tuesday', 'Wednesday'] var labels = json.map(function(item) { return item.timestamp; }); var data = { labels: labels, datasets: [ { label: "My First dataset", fillColor: "rgba(220,220,220,0.5)", strokeColor: "rgba(220,220,220,0.8)", highlightFill: "rgba(220,220,220,0.75)", highlightStroke: "rgba(220,220,220,1)", data: [65, 59, 80, 81, 56, 55, 40] }, { label: "My Second dataset", fillColor: "rgba(151,187,205,0.5)", strokeColor: "rgba(151,187,205,0.8)", highlightFill: "rgba(151,187,205,0.75)", highlightStroke: "rgba(151,187,205,1)", data: [28, 48, 40, 19, 86, 27, 90] } ] }; var ctx = document.getElementById("myChart").getContext("2d"); ctx.canvas.width = 1000; ctx.canvas.height = 800; var myChart = new Chart(ctx).Bar(data); });
如果您使用Angular我会建议使用angular chart.js版本，请参阅： http ：//jtblin.github.io/angular-chart.js/
然后你已经有一个角度指令，你可以使用！