实现el-table多选分页回显功能，左侧是分页的数据源，右侧是选择后的人员数据，切换下一页，选中的数据会在左侧表格回显。
实现：
<template><el-dialog :title="title" :visible.sync="show" :before-close="cancel" centerwidth="1050px" custom-class="bind-dialog"><div class="content"><div class="left-user" ><el-table ref="table" :data="tableData" border :row-key="getRowKeys" style="width: 100%;height: 100%"class="cust-table" size="mini" @select="handleSelectionChange" @select-all="selectAll"><el-table-column :reserve-selection="true" type="selection" width="50" align="center" center></el-table-column><el-table-column v-for="(item, index) in tableTitle" :label="item.label" :prop="item.prop" :key="index"align="center" center :width="item.width"><template slot-scope="scope"><div v-if="scope.row[item.prop]==null || scope.row[item.prop] ===''">-</div><div v-else>{{ scope.row[item.prop] }}</div></template></el-table-column></el-table></div><div class="right-user"><el-tagv-for="tag in selectedUsers":key="tag.userId"class="mr8 mb8"@close="delUser(tag)"closable>{{ tag.nickName }}</el-tag></div></div><paginationclass="mt12"v-show="total>0":total="total":page.sync="page.pageNum":limit.sync="page.pageSize"@pagination="queryList"/><span slot="footer" class="dialog-footer"><el-button @click="cancel">取消</el-button><el-button type="primary" @click="confirm">确定</el-button></span></el-dialog>
</template>el-table的ref、row-key、select、select-all、type="selection"、:reserve-selection="true"都是需要设置的，并且表格绑定的data初始值不能为null，可以设置[]
设置row-key
getRowKeys(row) {return row.userId},表格选择数据，@select="handleSelectionChange" @select-all="selectAll" 选择单个和全选都要写
handleSelectionChange(arr, row) {const bool = this.selectedUsers.some(user => user.userId === row.userId) // 存在返回true 否则返回falseif (bool) {// 存在删除this.selectedUsers = this.selectedUsers.filter(user => user.userId !== row.userId)} else {// 添加this.selectedUsers.push(row)}},selectAll(arr){if (arr.length !== 0) {// 全选arr.forEach(item => {const bool = this.selectedUsers.some(user => user.userId === item.userId) // 存在返回true 否则返回falseif (!bool) {// 不存在添加this.selectedUsers.push(item)}})} else {// 取消全选this.tableData.forEach(item => {this.selectedUsers = this.selectedUsers.filter(user => user.userId !== item.userId)})}},删除右侧选中数据的时候，不仅要对右侧选中数组处理，还要把左侧数组的选中状态设为未选中；
delUser(node) {this.selectedUsers = this.selectedUsers.filter(user => user.userId !== node.userId)this.tableData.forEach(item => {if (node.userId === item.userId) {// 存在添加this.$refs.table.toggleRowSelection(item, false)}})},在数据编辑的时候，回显设置。注意切换table的page的时候要清除table的选中状态，重新设置选中状态，因为当右侧删除选中的数据不是当前页，分页切换的时候要刷新table的选中状态。
queryList() {this.loading = truelet queryParams = {pageNum: this.page.pageNum,pageSize: this.page.pageSize,}queryUserData(queryParams).then((res) => {if (res.code === 200) {this.tableData = res.rowsthis.total = res.total// 切换分页的时候要清楚table的选中状态，在根据selectedUsers的值设置table选中状态this.$refs.table.clearSelection()if (this.selectedUsers.length > 0) {this.$nextTick(()=>{for (let i = 0; i < this.tableData.length; i++) {this.selectedUsers.forEach(item=>{if (item.userId == this.tableData[i].userId){this.$refs.table.toggleRowSelection(this.tableData[i], true);}})}})}}}).finally(() => {this.loading = false})},css样式设置
<style lang="scss" scoped>
.bind-dialog {.content {display: flex;height: 406px;.left-user {flex: 1;margin-right: 12px;}.right-user {width: 310px;padding: 12px;height: 100%;box-sizing: border-box;border: 1px solid #dfe6ec;border-radius: 6px;overflow: hidden auto;}}.mt12{margin-bottom: 12px;}.mr8{margin-right: 8px;}.mb8{margin-bottom: 8px;}
}
</style>
