better-scroll 初始化

<template>
    <div class="shop_container">
        <section>
            <div>
                12321312
            </div>
        </section>
        <section class="menu_container">
            <section class="menu_left" id="wrapper_menu" ref="wrapperMenu">
                <ul>
                    <li v-for="(item,index) in menuList" :key="index" class="menu_left_li" :class="{activity_menu: index == menuIndex}" @click="chooseMenu(index)">

                        <img :src="getImgPath(item.icon_url)" v-if="item.icon_url">
                        <span>{{item.name}}</span>
                        <span class="category_num" v-if="categoryNum[index]&&item.type==1">{{categoryNum[index]}}</span>
                    </li>
                </ul>
            </section>
        </section>
        <section>
            <div v-for="i in 2">
                {{i}}
            </div>
        </section>
    </div>
</template>
<script>
    import {Flexbox, FlexboxItem} from 'vux'
    import BScroll from 'better-scroll'
    export default {
        data() {
            return {
                categoryNum:[],
                menuList:[
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },

                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜3",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        name:"热销榜",
                        type:'1',
                        is_selected:true,
                        id:2,
                        description:"大家喜欢吃，才叫真好吃。",
                        restaurant_id:1,
                        foods:[
                            {
                                name:1,
                                restaurant_id:1,
                                month_sales:622,
                                category_id:2,
                                specfoods :[
                                    {
                                        food_id:3152,
                                        name:1,
                                        price:20,
                                        sold_out:false,
                                        specs_name:"默认"
                                    }
                                ]
                            }
                        ]
                    },
                ]
            }
        },
        created(){

        },
        mounted() {
            setTimeout(() => {
                this.$nextTick(()=>{
                    this.initScroll()
                })
            }, 20)
        },
        methods:{
            initScroll(){
                if (!this.scroll) {
                    this.scroll = new BScroll(this.$refs.wrapperMenu, {
                        click: true
                    });
                } else {
                    this.scroll.refresh();
                }
                console.log(this.scroll)
            }
        },
        components: {
            Flexbox, FlexboxItem
        }
    }
</script>
<style lang="less">
    .shop_container{
        display: flex;
        flex-direction: column;
        position: absolute;
        right: 0;
        left: 0;
        height: 100%;
    }
    .menu_container{
        display: flex;
        flex: 1;
        overflow-y: hidden;
        position: relative;
        .menu_left{
            width: 3.8rem;
            .menu_left_li{
                padding: .7rem .3rem;
                border-bottom: 0.025rem solid #ededed;
                box-sizing: border-box;
                border-left: 0.15rem solid #f8f8f8;
                position: relative;
                .category_num{
                    position: absolute;
                    top: .1rem;
                    right: .1rem;
                    background-color: #ff461d;
                    line-height: .6rem;
                    text-align: center;
                    border-radius: 50%;
                    border: 0.025rem solid #ff461d;
                    min-width: .6rem;
                    height: .6rem;
                    font-family: Helvetica Neue,Tahoma,Arial;
                }
            }
            .activity_menu{
                border-left: 0.15rem solid #3190e8;
                background-color: #fff;
                span:nth-of-type(1){
                    font-weight: bold;
                }
            }
        }
    }
</style>