使ChartJS餅圖具有動態數據

Question

我無法顯示包含動態數據的ChartJS餅圖，我在Google上搜索了很多，也找不到解決方案，因此在這里為您提供幫助。

 window.onload = function() {
            $.ajax({
            url: 'https://jsonplaceholder.typicode.com/todos/1',
            dataType: "json",
            method: "GET",
            headers: {
              "Accept": "application/json; odata=verbose"
            },
            success: function(data) {
              // var dataResults = data.d.results;
              var tempData = [{
                  EnterpriseProjectTypeName: 'first project'
                },
                {
                  EnterpriseProjectTypeName: 'first project'
                },
                               {
                  EnterpriseProjectTypeName: 'first project'
                },
                {
                  EnterpriseProjectTypeName: 'second project'
                },
                               {
                  EnterpriseProjectTypeName: 'third project'
                },
                {
                  EnterpriseProjectTypeName: 'test'
                }
              ];

              var itermeidiaryObject = {};
              $.each(tempData, function(key, value) {
                var epn = value.EnterpriseProjectTypeName;
                var som = 0;
                if (epn != null) {
                  itermeidiaryObject[epn] = ++itermeidiaryObject[epn] || 1;
                }
                var somme = som;
              });
              var finalObject = Object.keys(itermeidiaryObject).map(function(key) {
                return {
                  label: key,
                  y: itermeidiaryObject[key]
                }
              });

    var ctx = document.getElementById('myChart').getContext('2d');
    var lables=tempData
    var myChart = new Chart(ctx, {
      type: 'bar',
      data: {
                labels: finalObject,
                datasets: [{

                    data: finalObject,

                }]
            },

        options: {
        responsive: false,
        scales: {
          xAxes: [{
            ticks: {
              maxRotation: 90,
              minRotation: 80
            }
          }],
          yAxes: [{
            ticks: {
              beginAtZero: true
            }
          }]
        }
      }
    });

                  }
    });
       }

這是html部分

  <canvas id="myChart"></canvas>
    </div><script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/chart.js@2.8.0"></script>

有人可以幫我嗎？

Answer 1

您要餅圖還是條形圖？ 進行了一些編輯以使它成為餅圖，盡管您可以回到條形圖上，對標簽的處理方式進行一些編輯，因為看起來標簽需要是數組中的單個值。 可能是更好的方法，但這應該有所幫助。 這是餅圖。 您在HTML中也有一個流氓div。

 window.onload = function() { $.ajax({ url: 'https://jsonplaceholder.typicode.com/todos/1', dataType: "json", method: "GET", headers: { "Accept": "application/json; odata=verbose" }, success: function(data) { // var dataResults = data.d.results; var tempData = [{ EnterpriseProjectTypeName: 'first project' }, { EnterpriseProjectTypeName: 'first project' }, { EnterpriseProjectTypeName: 'first project' }, { EnterpriseProjectTypeName: 'second project' }, { EnterpriseProjectTypeName: 'third project' }, { EnterpriseProjectTypeName: 'test' } ]; var itermeidiaryObject = {}; $.each(tempData, function(key, value) { var epn = value.EnterpriseProjectTypeName; var som = 0; if (epn != null) { itermeidiaryObject[epn] = ++itermeidiaryObject[epn] || 1; } var somme = som; }); var finalObject = Object.keys(itermeidiaryObject).map(function(key) { return { label: key, y: itermeidiaryObject[key] } }); var pievalues = finalObject.map(function(value, index) { return value.y; }); var labels = finalObject.map(function(value, index) { return value.label; }); var colorscheme = colors.slice(0, labels.length); console.log(labels); console.log(pievalues); console.log(finalObject); var ctx = document.getElementById('myChart').getContext('2d'); var myChart = new Chart(ctx, { type: 'pie', data: { labels: labels, datasets: [{ data: pievalues, backgroundColor: colorscheme }] }, options: { responsive: false, } }); } }); } var colors = ["#0074D9", "#FF4136", "#2ECC40", "#FF851B", "#7FDBFF", "#B10DC9", "#FFDC00", "#001f3f", "#39CCCC", "#01FF70", "#85144b", "#F012BE", "#3D9970", "#111111", "#AAAAAA"]; 

 <canvas id="myChart"></canvas> <script src="https://code.jquery.com/jquery-3.1.1.min.js"></script> <script src="https://cdn.jsdelivr.net/npm/chart.js@2.8.0"></script> 

我以為您在處理程序成功中提供的數據幾乎就是您以JSON返回的內容？