<el-table ref="multipleTable" :data="appList" @selection-change="changeFun">
<el-table-column type="selection" width="55" class="selection" prop='uuid' :selectable='checkboxInit' @selection-change="changeFun"></el-table-column>
<el-table-column label="">
<template scope="scope"></template>
</el-table-column>
<el-table-column prop="username" label="username"></el-table-column>
<el-table-column prop="createTime" label="创建时间"></el-table-column>
</el-table>
设定此属性@selection-change="changeFun"，意思是每次勾选的时候都会触发这个事件
//复选框状态改变
changeFun(val) {
this.multipleSelection = val;
}