【vue】vue封装echarts数据更新页面不重新渲染

问题

在mounted中加载echart,在加载一次之后,父组件传过的数据变化,也不会再次引起渲染

解决思路

利用watch去监听数据的变化，当监听到变化时，让echarts去重新渲染

  props: {
    value1: Object,
    value2: Object,
    title: {
      type: String,
      default: ''
    },
    title1: {
      type: String,
      default: ''
    },
    title2: {
      type: String,
      default: ''
    }
  },
  mounted () {
    this.init()
  },
  watch: {
    value1: {
      handler () {
        this.init()
      },
      deep: true
    }
  },
  methods: {
    init () {
      const data1 = [this.value1.gpa, this.value1.gpa1, this.value1.gpa2, 5]
      const data2 = [this.value2.gpa, this.value2.gpa1, this.value2.gpa2, 5]
      const mychart = echarts.init(this.$refs.echart)
      const option = {
        title: {
          text: this.title
        },
        tooltip: {
          trigger: 'item'
        },
        legend: {
          data: [this.title1, this.title2]
        },
        radar: {
          indicator: [
            { name: '总绩点', max: 5 },
            { name: '高数上', max: 5 },
            { name: '高数下', max: 5 },
            { name: '其他、', max: 5 }
          ],
          radius: '60%'
        },
        series: [
          {
            name: 'Budget vs spending',
            type: 'radar',
            data: [
              {
                value: data1,
                name: this.title1
              },
              {
                value: data2,
                name: this.title2
              }
            ]
          }
        ]
      }
      mychart.setOption(option)
    }
  }
}