完善前端适配多字段排序功能案例OSS页面（完善排序图标显示效果和重置效果，支持正序，倒序，取消排序）

ruoyi-ui/src/views/system/oss/index.vue

@@ -119,7 +119,9 @@
     </el-row>
 
     <el-table v-loading="loading" :data="ossList" @selection-change="handleSelectionChange"
-              :default-sort="defaultSort" @sort-change="handleSortChange">
+              :header-cell-class-name="handleHeaderClass"
+              @header-click="handleHeaderCLick"
+              v-if="showTable">
       <el-table-column type="selection" width="55" align="center" />
       <el-table-column label="对象存储主键" align="center" prop="ossId" v-if="false"/>
       <el-table-column label="文件名" align="center" prop="fileName" />
@@ -137,14 +139,14 @@
         </template>
       </el-table-column>
       <el-table-column label="创建时间" align="center" prop="createTime" width="180"
-                       sortable="custom" :sort-orders="['descending', 'ascending']">
+                       sortable="custom">
         <template slot-scope="scope">
           <span>{{ parseTime(scope.row.createTime, '{y}-{m}-{d}') }}</span>
         </template>
       </el-table-column>
       <el-table-column label="上传人" align="center" prop="createBy" />
       <el-table-column label="服务商" align="center" prop="service"
-                       sortable="custom" :sort-orders="['descending', 'ascending']"/>
+                       sortable="custom"/>
       <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
         <template slot-scope="scope">
           <el-button
@@ -196,6 +198,7 @@ export default {
   name: "Oss",
   data() {
     return {
+      showTable: true,
       // 按钮loading
       buttonLoading: false,
       // 遮罩层
@@ -267,6 +270,7 @@ export default {
         this.ossList = response.rows;
         this.total = response.total;
         this.loading = false;
+        this.showTable = true;
       });
     },
     checkFileSuffix(fileSuffix) {
@@ -294,9 +298,11 @@ export default {
     },
     /** 重置按钮操作 */
     resetQuery() {
+      this.showTable = false;
       this.daterangeCreateTime = [];
       this.resetForm("queryForm");
-      this.$refs.tables.sort(this.defaultSort.prop, this.defaultSort.order)
+      this.queryParams.orderByColumn = this.defaultSort.prop;
+      this.queryParams.isAsc = this.defaultSort.order;
       this.handleQuery();
     },
     // 多选框选中数据
@@ -305,14 +311,41 @@ export default {
       this.single = selection.length!==1
       this.multiple = !selection.length
     },
-    /** 排序触发事件 */
+    // 设置列的排序为我们自定义的排序
-    handleSortChange({column, prop, order}) {
+    handleHeaderClass({column}) {
+      column.order = column.multiOrder
+    },
+    // 点击表头进行排序
+    handleHeaderCLick(column) {
+      if (column.sortable !== 'custom') {
+        return
+      }
+      switch (column.multiOrder) {
+        case 'descending':
+          column.multiOrder = 'ascending';
+          break;
+        case 'ascending':
+          column.multiOrder = '';
+          break;
+        default:
+          column.multiOrder = 'descending';
+          break;
+      }
+      this.handleOrderChange(column.property, column.multiOrder)
+    },
+    handleOrderChange(prop, order) {
       let orderByArr = this.queryParams.orderByColumn ? this.queryParams.orderByColumn.split(",") : [];
       let isAscArr = this.queryParams.isAsc ? this.queryParams.isAsc.split(",") : [];
       let propIndex = orderByArr.indexOf(prop)
       if (propIndex !== -1) {
+        if (order) {
           //排序里已存在 只修改排序
           isAscArr[propIndex] = order;
+        } else {
+          //如果order为null 则删除排序字段和属性
+          isAscArr.splice(propIndex, 1);//删除排序
+          orderByArr.splice(propIndex, 1);//删除属性
+        }
       } else {
         //排序里不存在则新增排序
         orderByArr.push(prop);