opc优化

src/views/opc/OpcInfo.vue

@@ -21,7 +21,7 @@
         @dragstop="resize">
         <a-tooltip>
           <template slot="title">
-            {{ item.result + item.unit }}
+            {{ item.description }}
           </template>
           <div class="info" @click="handleInfo(item)"> {{ item.result }}</div>
         </a-tooltip>

src/views/opc/modules/BaseChartInfo.vue

@@ -115,7 +115,9 @@ export default {
           const data = []
           res.data.filter(item => data.push({ time: item.createdTime, value: item.result, type: this.remoteOpc.sbName }))
           this.dataList = data
-          this.createChart(this.dataList)
+          if (this.dataList != null && this.dataList.length > 0) {
+            this.createChart(this.dataList)
+          }
         })
     },
     createChart (data) {