fs方法举例

实现效果

根据接口传来的数据，使用echarts绘制出，共用一个x轴的图表
功能：后端将所有数据传送过来，前端通过监听选中值来展示对应的图表数据

数据格式：

代码：

<template>
  <div>
    <div class="screen-list-item">
      <span style="display: inline-block; width: 140px">量测类录波值选项：</span>
      <el-select
        multiple
        collapse-tags
        collapse-tags-tooltip
        style="width: 260px"
        clearable
        popper-class="select-box"
        :teleported="false"
        v-model="SensorListVal"
        placeholder="请输入量测"
        size="small"
        class="m-2"
      >
        <el-option
          v-for="item in SensorList.data"
          :key="item.value"
          :label="item.label"
          :value="item.value"
        />
      </el-select>
    </div>
    <div
      id="FaultRecording1"
      style="width: 800px; height: 180px; margin: auto"
    ></div>
  </div>
</template>

<script>
// 引入echarts
import * as echarts from "echarts";
import { onMounted, reactive, ref, watch } from "vue";
// 调用接口数据
import { AllRecordDataApi } from "@/utils/record";
import { RecordPostBc } from "@/utils/request";

export default {
  setup() {
    let recordDataList = ref([]);
    let xseriesdata = ref([]);
    let SensorListVal = ref([]);
    let SensorList = reactive({
      data: [],
    });
    
    // 获取录波数据
    let recordData = async () => {
      const result = await RecordPostBc(AllRecordDataApi, {});
      console.log(result)
      // 找出数据中所有选项，为筛选框的选择项
      SensorList.data = result.list.map(obj => ({ value: obj.name, label: obj.name }) );
      // 图表数据
      recordDataList.value = result.list
      xseriesdata.value = result.time
      // 默认选择前两项
      SensorListVal.value = SensorList.data.slice(0, 2).map(item => item.value);
      recordEcharts1()
    }
    
    //绘制图表
    let recordEcharts1 = () => {
      let myChart = echarts.init(document.getElementById("FaultRecording1"));
      myChart.clear(); // 清除之前的图表实例

      let options = {
        grid: [
            // 第一个折线图
            {
                left: '3%',
                right: '4%',
                top: '10%',
                height: '32%',
            },
            // 第二个折线图
            {
                left: '3%',
                right: '4%',
                top: '50%',
                height: '32%',
            },
        ],
        tooltip: {
            trigger: 'axis', 
        },
        // 将上下两个tootip合成一个
        axisPointer: {
            link: { xAxisIndex: 'all' },
        },
        xAxis: [
            {
                type: 'category',
                scale: true,
                axisLabel: {
                    show: false,
                },
                data: xseriesdata.value, //x轴时间的数据
            },
            {
                gridIndex: 1,
                type: 'category',
                scale: true,
                data: xseriesdata.value, //x轴时间的数据
            },
        ],
        yAxis: [
            {
                type: 'value',
                scale: false,
                splitLine: {
                    show: false,
                },
            },
            {
                type: 'value',
                gridIndex: 1,
                scale: true,
                splitLine: {
                    show: false,
                },
            },
        ],
        dataZoom: [
          {
            show: true,
            realtime: true,
            start: 30,
            end: 70,
            xAxisIndex: [0, 1],
          },
          {
            type: "inside",
            realtime: true,
            start: 30,
            end: 70,
            xAxisIndex: [0, 1],
          },
        ],
        series: [],
      };
      // 添加每条曲线数据到 series 中
      for (var i = 0; i < recordDataList.value.filter(record => SensorListVal.value.includes(record.name)).length; i++) {
          options.series.push({
              xAxisIndex: i,
              yAxisIndex: i,
              name: recordDataList.value.filter(record => SensorListVal.value.includes(record.name))[i].name,
              type: 'line',
              smooth: 'true',
              data: recordDataList.value.filter(record => SensorListVal.value.includes(record.name))[i].data
          });
      }
      myChart.setOption(options);
      
    }
    
    onMounted(() => {
      recordData();
    });
    
    // 监听 SensorListVal 的变化
    watch(SensorListVal, (newValue, oldValue) => {
      recordEcharts1()
    });
    
    return { SensorList, SensorListVal  };
  },
};