删除普后，在次加载普的时候，上次数据没有清空的问题

src/views/spectrumAnalysis/components/RoiLimits.vue

@@ -11,7 +11,7 @@
       </span>
     </div>
     <div class="beta-gamma-spectrum-chart-main">
-      <CustomChart key="1" ref="roiLimitsRef" :option="roiLimitsOption" />
+      <CustomChart :key="chartKey" ref="roiLimitsRef" :opts="opts" :option="roiLimitsOption" />
     </div>
   </div>
 </template>
@@ -106,36 +106,33 @@ export default {
   watch: {
     ROILists: {
       handler(newVal) {
-        // this.active = 0
-        // this.$emit('sendIndex', 0)
-        // const [ROIOneList, ...lists] = newVal
         this.buildOneLineList(newVal[this.active])
       },
-      // immediate: true,
+      immediate: true,
     },
   },
+  beforeDestroy() {
+    const myChart = this.$refs.roiLimitsRef.getChartInstance()
+    myChart.dispose()
+  },
   data() {
     this.buttons = buttons
     return {
       active: 0,
       roiLimitsOption,
+      opts: {
+        notMerge: true,
+      },
+      chartKey: 'limit',
     }
   },
-  mounted() {
-    // this.$bus.$on('updateRoi', this.updateRoi)
-  },
-  destroyed() {
-    // this.$bus.$off('updateRoi', this.updateRoi)
-  },
   methods: {
-    // updateRoi(data) {
-    //   this.buildOneLineList(data)
-    //   this.active = 0
-    // },
     buildOneLineList(val) {
-      if (val) {
       const currSeries = this.roiLimitsOption.series
+      if (val) {
         currSeries.data = val.map((item) => [item.x, item.y])
+      } else {
+        currSeries.data = []
       }
     },
     // 点击改变Beta-Gamma Spectrum: Sample图表类型