vue不更新echart中的子图表组件

Question

我已经构建了一个vue组件来显示E图表库中的饼图，如下所示。饼图将使用默认值初始化。

pieChart.vue

<template>
  <div :class="className" :style="{height:height,width:width}" />
</template>

<script>
import echarts from 'echarts'
require('echarts/theme/macarons') // echarts theme
import resize from './mixins/resize'
export default {
  mixins: [resize],
  props: {
    className: {
      type: String,
      default: 'chart'
    },
    width: {
      type: String,
      default: '100%'
    },
    height: {
      type: String,
      default: '300px'
    },
    chartData: {
      type: Object,
      required: true
    }    
  },
  watch: {
    chartData: function(val){
        console.log('chartdata handler',val);
        this.setOptions(val.legend, val.data);
    }
  },  
  data() {
    return {
      chart: null
    }
  },
  mounted() {
    this.$nextTick(() => {
      this.initChart()
    })
  },
  beforeDestroy() {
    if (!this.chart) {
      return
    }
    this.chart.dispose()
    this.chart = null
  },
  methods: {
    initChart() {
      this.chart = echarts.init(this.$el, 'macarons');
      this.setOptions(
         ['group_a','group_b','group_c'],
         [
           { value: 1, name: 'group_a' },
           { value: 2, name: 'group_b' },
           { value: 3, name: 'group_c' },
        ]
      );
    },

    setOptions( lengend, data ) {

      this.chart.setOption({
        tooltip: {
          trigger: 'item',
          formatter: '{a} <br/>{b} : {c} ({d}%)'
        },
        legend: {
          left: 'center',
          bottom: '10',
          data: lengend
        },
        series: [
          {
            name: 'WEEKLY WRITE ARTICLES',
            type: 'pie',
            roseType: 'radius',
            radius: '50%',
            data: data,
            animationEasing: 'cubicInOut',
            animationDuration: 2600
          }
        ]
      });

    }

  }
}
</script>

然后在视图中使用此组件。

<template>
    <pie-chart :chartData="updateData"/>
</template>
<script>
export default {
        name: 'Personalinforadm',
        components: { 
            PieChart,
        },
        data() {
            return {
             updateData: {
               data:[
                  { value: 33, name: 'group_a' },
                  { value: 17, name: 'group_b' },
                  { value: 3, name: 'group_c' },
              ],
              legend:['group_a','group_b','group_c']
             }
         }
      },
        created() {

            this.updateData = {
               data:[
                  { value: 3, name: 'group_a' },
                  { value: 17, name: 'group_b' },
                  { value: 3, name: 'group_c' },
              ],
              legend:['group_a','group_b','group_c']
             }
        }
}
</script>

但是，视图不会用创建的方法中的新值更新饼图组件。为什么新值不传递给饼组件并触发监视方法，有什么想法吗?代码出了什么问题？

Answer 1

看看下面的https://github.com/ecomfe/vue-echarts或解决方案可能会对您有帮助。(如果您使用版本>4.x)

sample.vue

<template>
   //...
   <v-chart
     class="chart mt-7"
     :option="botChartData"
     :update-options="updateOpts"
   />
   //...
</template>
<script>
export default {
    data() {
        return {
            updateOpts: {
               notMerge: true,
            },
            botChartData: {
                 tooltip: {
                      trigger: "item",
                      formatter: "{a} <br/>{b} : {c} ({d}%)",
                 },
                 series: [
                  {
                    name: "Active Bots",
                    type: "pie",
                    center: ["50%", "50%"],
                    radius: ["75%", "90%"],
                    itemStyle: {
                      borderRadius: 8,
                    },
                    data: [],
                   }
                 ],
            },
        };
    },
    methods: {
       connect() {
         this.bots = [
           {
              value: 0,
              name: "a",
           },
           {
              value: 1,
              name: "b",
           },
           {
              value: 2,
              name: "c",
           },
         ];
         this.botChartData.series[0].data = this.bots;
       }
    },
};
</script>

我在“创建”中调用了"connect“，您可以在挂载或事件中调用它！

如果您需要将图表设置为子组件，您可以像下面这样轻松地传递this.botChartData

child.vue

<template>
  <v-chart
     class="chart mt-7"
     :option="botData"
     :update-options="updateConf"
  />
 </template>

 <script>
  export default {
     props: {
        botChartData: {
             type: Object
        },
        updateOpts: {
             type: Object
        }
     },
     computed: {
        botData() {
           return this.botChartData
        },
        updateConf() {
           return this.updateOpts
        }
     }
  };
 </script>

在parent.vue中

<template>
 //...
 <sample :botChartData="botChartData" :updateOpts="updateOpts" />
 //...
</template>
<script>
  //...the same as sample.vue js
</script>

顺便说一下，如果您在一页中有多个图表，不要忘记notMerge，那么在它们之间切换之后，您的图表将重新初始化