新手求助。可以console.log(res)数据，但是渲染不出来是怎么回事

分类：uni-app

<template>  
    <view class="content">        
        <view class="" v-for="(item,index) in catembookList">  
            {{item.className}}  
        </view>  
    </view>  
</template>  
<script>  
    export default {  
        data(){  
            return {  
                catembookList:[],                 
            }  
        },  
        onLoad(){  
                uni.request({  
                    url: "https://api.yousuu.com/api/bookStore/",  
                    success:res=>{  
                        console.log(res)                          
                        this.catembookList=res.data;                      
                    }  

                })  
        },  
        methods: {  
        }  
    }  
</script>