小编Koe*_*aan的帖子

从段切换后我无法显示图表.我目前有2个段,索引和编辑.在索引上我成功显示了Chart.js的图表.

图表代码:

diagram = function() {
    var finished = 0;
    var pending = 0;

    for (var i = 0; i < this.goal.activities.length; i++) {
      var current = this.goal.activities[i];
      if (current.completed == true) { finished++ } else { pending++ }
    }
    this.piChart = new Chart(this.piCanvas.nativeElement, {
      type: 'doughnut',
      data: {
          labels: ["finished activities", "pending activities"],
          datasets: [{
            label: '# of Votes',
            data: [
              finished
              ,
              pending
            ],
            backgroundColor: [
              'rgba(255, 99, 132, 0.2)',
              'rgba(54, 162, 235, 0.2)' …