VueChart.js-数据更改时图表不会更新

我正在使用Vue.js和Chart.js绘制一些图表.每次调用该函数时generateChart(),图表都不会自动更新.当我检查数据时generateChart(),它们是正确的,但图表并不代表那些.

有趣的事实:当我调整窗口大小时,图表正在更新.

我正在做什么有什么问题？

每次打电话时如何更新图表object？

我觉得这将是一些与相关的array和generateChart()变化的检测警告,但我不知道该怎么做.

https://codepen.io/anon/pen/bWRVKB?editors=1010

     


 export default{
    data (){
        const self = this;
        return {
         dataChart : {
                labels : [],
                datasets: [{
                        label: 'label',
                        backgroundColor: '#FC2525',
                        data: [0, 1, 2, 3, 4],
                    }]
        }
    }
}


 generateChart() { 
     this.dataChart['labels'] = [];
     this.dataChart['datasets'] = [];

     ... compute datasets and formattedLabels

     this.dataChart['labels'] = formattedLabels;
     this.dataChart['datasets'] = datasets;
 }

LineChart.js

import { Line, mixins } from 'vue-chartjs'

export default Line.extend({
    mixins: [mixins.reactiveProp],
    props: ["options"],
    mounted () {
        this.renderChart(this.chartData, this.options)
    }
})

azs06.. 24

对图表数据使用计算属性.而不是调用this.renderChart值班包装在一个方法和重复使用方法上mounted和watch.

Vue.component("line-chart", {
  extends: VueChartJs.Line,
  props: ["data", "options"],
  mounted() {
    this.renderLineChart();
  },
  computed: {
    chartData: function() {
      return this.data;
    }
  },
  methods: {
    renderLineChart: function() {
    this.renderChart(
      {
        labels: [
          "January",
          "February",
          "March",
          "April",
          "May",
          "June",
          "July"
        ],
        datasets: [
          {
            label: "Data One",
            backgroundColor: "#f87979",
            data: this.chartData
          }
        ]
      },
      { responsive: true, maintainAspectRatio: false }
    );      
    }
  },
  watch: {
    data: function() {
      this._chart.destroy();
      //this.renderChart(this.data, this.options);
      this.renderLineChart();
    }
  }
});

var vm = new Vue({
  el: ".app",
  data: {
    message: "Hello World",
    dataChart: [10, 39, 10, 40, 39, 0, 0],
    test: [4, 4, 4, 4, 4, 4]
  },
  methods: {
    changeData: function() {
      this.dataChart = [6, 6, 3, 5, 5, 6];
    }
  }
});

  
  
  



    {{ dataChart }}
   Change data
  
 

Vue.component("line-chart", {
  extends: VueChartJs.Line,
  props: ["data", "options"],
  mounted() {
    this.renderLineChart();
  },
  computed: {
    chartData: function() {
      return this.data;
    }
  },
  methods: {
    renderLineChart: function() {
    this.renderChart(
      {
        labels: [
          "January",
          "February",
          "March",
          "April",
          "May",
          "June",
          "July"
        ],
        datasets: [
          {
            label: "Data One",
            backgroundColor: "#f87979",
            data: this.chartData
          }
        ]
      },
      { responsive: true, maintainAspectRatio: false }
    );      
    }
  },
  watch: {
    data: function() {
      this._chart.destroy();
      //this.renderChart(this.data, this.options);
      this.renderLineChart();
    }
  }
});

var vm = new Vue({
  el: ".app",
  data: {
    message: "Hello World",
    dataChart: [10, 39, 10, 40, 39, 0, 0],
    test: [4, 4, 4, 4, 4, 4]
  },
  methods: {
    changeData: function() {
      this.dataChart = [6, 6, 3, 5, 5, 6];
    }
  }
});

  
  
  



    {{ dataChart }}
   Change data