转档记录批量下载功能

pages/members/me/expenses.vue

@@ -154,6 +154,7 @@ export default {
     handleSelectionChange(val) {
       this.tableDataSelection = val
       if (this.tableDataSelection.length === 0) {
+        this.isDownload = true
         this.isDelete = true
       } else {
         this.isDelete = false