<el-col :span="4" :offset="1" v-if="this.isTitileUpdate == true">
<el-button @click="handleTitleUpdate()" type="text">修改</el-button>
</el-col>
<el-col :span="4" :offset="1" v-if="this.isTitileUpdate == false">
<el-button @click="handleSaveTitle()" type="text">保存</el-button>
</el-col>
在js中定义
this.isTitileUpdate: true