v-if 踩坑

一个个写的时候，v-if + this 可以： 

                <van-action-sheet v-model="show" title="请选择上市进程" :actions="actions" @select="onSelect" >

                    <div class="sb" @click="change" :class="selecked?'fontcolor':''">尚未改制<van-icon v-if="this.selecked" name="success" class="checked-icon" color="#3271E3"/></div>

                    <div class="sb" @click="change" :class="selecked?'fontcolor':''">改制进程中<van-icon v-if="this.selecked" name="success" class="checked-icon" color="#3271E3"/></div>                    

                    <div class="sb" @click="change" :class="selecked?'fontcolor':''">已进入辅导期<van-icon v-if="this.selecked" name="success" class="checked-icon" color="#3271E3"/></div>

                    <div class="sb" @click="change" :class="selecked?'fontcolor':''">材料已报证监会<van-icon v-if="this.selecked" name="success" class="checked-icon" color="#3271E3"/></div>                                                               

                </van-action-sheet> 

 

报错：

v-for 情况下，v-if + this 不行 

                    <div class="sb" @click="change" :class="selecked?'fontcolor':''" v-for="item in titles" :key="item">{{item}}<van-icon v-if="this.selecked" name="success" class="checked-icon" color="#3271E3"/></div> 

以上两种情况下，selected都定义了（没错，都定义了，所以不能看第2种情况错误原因） ，不信看下面

定义：

    data(){

        return{

            username: '',

            isbgcolor: true,

            isSelected: false,

            show: false,

            selecked: false,

            titles: ['cc','vv','bb'],       

        }

    },

                    <div class="sb" @click="change" :class="selecked?'fontcolor':''" v-for="item in titles" :key="item">{{item}}<van-icon v-if="selecked" name="success" class="checked-icon" color="#3271E3"/></div>  

去掉 this. 就可以了