关于Element-ui中table默认选中toggleRowSelection问题

<script>
export default {   
	mounted() {
    	this.$refs.multipleTable.toggleRowSelection(this.tableData3[2],true);
	}
}
</script>
 

<template>
	<el-table :data="tableData3"  ref="multipleTable" @row-click="handleCurrentChange">
	</el-table>
</template>

<script>
export default {   
	methods: {
		handleCurrentChange(row, event, column){
			this.$refs.multipleTable.toggleRowSelection(row,true);//点击选中
		}
    }
}
</script>

<template>
	<el-table :data="tableData3"  ref="multipleTable" @row-click="handleCurrentChange" @selection-change="selsChange">
	</el-table>
</template>

<script>
export default {   
	methods: {
		selsChange( val){
			this.sels=val;
			console.log(this.sels)
		}
    }
}
</script>

exports.install = function (Vue, options) {
    //删除数组 指定的元素
    Vue.prototype.removeByValue=function(arr, val){
        for(var i=0; i<arr.length; i++) {
            if(arr[i] == val) {
                arr.splice(i, 1);
                break;
            }
        }
    };
};

<template>
	<el-table :data="tableData3"  ref="multipleTable" @row-click="handleCurrentChange" @selection-change="selsChange">
		<el-table-column type="selection" width="55" ></el-table-column>
		<el-table-column type="index" label="序号" width="60"></el-table-column>
		<el-table-column prop="sex" label="性别" width="100" :formatter="formatSex"></el-table-column>
		<el-table-column prop="date" label="日期"></el-table-column>
		<el-table-column prop="name" label="姓名"></el-table-column>
		<el-table-column prop="address" label="地址"></el-table-column>
	</el-table>
</template>

<script>
export default {   
	data() {
		return {
	        tableData3: [{
	        	id:'1',
				date: '2016-05-03',
				name: '嘎哈和',
				address: '上海市普陀区金沙江路 1518 弄',
				sex:'1'
	        }, {
	        	id:'2',
				date: '2016-05-02',
				name: '王小虎',
				address: '上海市普陀区金沙江路 1518 弄',
				sex:'0'
	        }, {
	        	id:'3',
				date: '2016-05-02',
				name: '莫默模',
				address: '上海市普陀区金沙江路 1518 弄',
				sex:'-1'
	        }],
	        arrID:[],
 
	    }
	},
	methods: {
		formatSex: function (row, column, cellValue, index) {
			return row.sex == 1 ? '男' : row.sex == 0 ? '女' : '未知';
		},
		// 点击事情
        handleCurrentChange(row, event, column){  
        	var same=false;
            if(this.arrID.length > 0){
				for(var i=0; i<this.arrID.length ;i++){
					if(this.arrID[i]==row.id){
						same=true;
						this.removeByValue(this.arrID, row.id);
						break;
					}
				}
				if(same==true){
	            	this.$refs.multipleTable.toggleRowSelection(row,false);
	            }else{
	            	this.$refs.multipleTable.toggleRowSelection(row,true);
	            	this.arrID.push(row.id);
	            }
            }else{
            	this.$refs.multipleTable.toggleRowSelection(row,true);
        		this.arrID.push(row.id);
            }
        },
        selsChange(val){
        	var valId=[];
        	for(var i=0;i<val.length;i++){
        		var arrIDsame=false;
        		valId.push(val[i].id);
        	}
        	this.arrID=valId;
        }
    },
    mounted() {  
        this.$refs.multipleTable.toggleRowSelection(this.tableData3[2],true);//默认选中  
    }
}
</script>
<style>
</style>

this.$nextTick(()=>{
   this.$refs.multipleTable.selection.forEach((select,index)=>{
      if(select.id === this.selectedTableData[data].id){
           this.$refs.multipleTable.toggleRowSelection(select,false);
      }
   })
})

:row-key="getRowKeys"
//多选时需要
getRowKeys(row) {
  return row.id;
},

this.$refs.multipleTable.clearSelection(）

this.$refs.multipleTable.toggleAllSelection()