用uniapp写一个点击左侧可以滑动的menu

完成后的图片（点击左侧右边或滑动，滑动右边左侧的选中也会变化）：

数据js （classifyData）：

export default[
   {
      "name": "女装",
      "foods": [
          {
            "name": "A字裙",
            "key": "A字裙",
            "icon": "https://cdn.uviewui.com/uview/common/classify/1/1.jpg",
            "cat": 10
          },
          {
            "name": "T恤",
            "key": "T恤",
            "icon": "https://cdn.uviewui.com/uview/common/classify/1/2.jpg",
            "cat": 10
          },
          {
            "name": "半身裙",
            "key": "半身裙",
            "icon": "https://cdn.uviewui.com/uview/common/classify/1/3.jpg",
            "cat": 10
          },
          {
            "name": "衬衫",
            "key": "衬衫",
            "icon": "https://cdn.uviewui.com/uview/common/classify/1/4.jpg",
            "cat": 10
          },
          {
            "name": "短裙",
            "key": "短裙",
            "icon": "https://cdn.uviewui.com/uview/common/classify/1/5.jpg",
            "cat": 10
          },
          {
            "name": "阔腿裤",
            "key": "阔腿裤",
            "icon": "https://cdn.uviewui.com/uview/common/classify/1/6.jpg",
            "cat": 10
          },
          {
            "name": "连衣裙",
            "key": "连衣裙",
            "icon": "https://cdn.uviewui.com/uview/common/classify/1/7.jpg",
            "cat": 10
          },
          {
            "name": "妈妈装",
            "key": "妈妈装",
            "icon": "https://cdn.uviewui.com/uview/common/classify/1/8.jpg",
            "cat": 10
          },
          {
            "name": "牛仔裤",
            "key": "牛仔裤",
            "icon": "https://cdn.uviewui.com/uview/common/classify/1/9.jpg",
            "cat": 10
          },
          {
            "name": "情侣装",
            "key": "情侣装",
            "icon": "https://cdn.uviewui.com/uview/common/classify/1/10.jpg",
            "cat": 10
          },
          {
            "name": "休闲裤",
            "key": "休闲裤",
            "icon": "https://cdn.uviewui.com/uview/common/classify/1/11.jpg",
            "cat": 10
          },
          {
            "name": "雪纺衫",
            "key": "雪纺衫",
            "icon": "https://cdn.uviewui.com/uview/common/classify/1/12.jpg",
            "cat": 10
          },
          {
            "name": "防晒衣",
            "key": "防晒衣",
            "icon": "https://cdn.uviewui.com/uview/common/classify/1/13.jpg",
            "cat": 10
          },
          {
            "name": "礼服/婚纱",
            "key": "礼服婚纱",
            "icon": "https://cdn.uviewui.com/uview/common/classify/1/14.jpg",
            "cat": 10
          }
      ]
   },
   {
    "name": "美食",
    "foods": [
        {
          "name": "火锅",
          "key": "火锅",
          "icon": "https://cdn.uviewui.com/uview/common/classify/2/1.jpg",
          "cat": 6
        },
        {
          "name": "糕点饼干",
          "key": "糕点饼干",
          "icon": "https://cdn.uviewui.com/uview/common/classify/2/2.jpg",
          "cat": 6
        },
        {
          "name": "坚果果干",
          "key": "坚果果干",
          "icon": "https://cdn.uviewui.com/uview/common/classify/2/3.jpg",
          "cat": 6
        },
        {
          "name": "酒类",
          "key": "酒类",
          "icon": "https://cdn.uviewui.com/uview/common/classify/2/4.jpg",
          "cat": 6
        },
        {
          "name": "辣条",
          "key": "辣条",
          "icon": "https://cdn.uviewui.com/uview/common/classify/2/5.jpg",
          "cat": 6
        },
        {
          "name": "大礼包",
          "key": "大礼包",
          "icon": "https://cdn.uviewui.com/uview/common/classify/2/6.jpg",
          "cat": 6
        },
        {
          "name": "精品茗茶",
          "key": "茶",
          "icon": "https://cdn.uviewui.com/uview/common/classify/2/7.jpg",
          "cat": 6
        },
        {
          "name": "休闲食品",
          "key": "休闲食品",
          "icon": "https://cdn.uviewui.com/uview/common/classify/2/8.jpg",
          "cat": 6
        },
        {
          "name": "糖果巧克力",
          "key": "糖果巧克力",
          "icon": "https://cdn.uviewui.com/uview/common/classify/2/9.jpg",
          "cat": 6
        },
        {
          "name": "方便速食",
          "key": "方便速食",
          "icon": "https://cdn.uviewui.com/uview/common/classify/2/10.jpg",
          "cat": 6
        },
        {
          "name": "营养代餐",
          "key": "营养代餐",
          "icon": "https://cdn.uviewui.com/uview/common/classify/2/11.jpg",
          "cat": 6
        },
        {
          "name": "粮油副食",
          "key": "粮油",
          "icon": "https://cdn.uviewui.com/uview/common/classify/2/12.jpg",
          "cat": 6
        },
        {
          "name": "生鲜水果",
          "key": "水果",
          "icon": "https://cdn.uviewui.com/uview/common/classify/2/13.jpg",
          "cat": 6
        },
        {
          "name": "饮品",
          "key": "饮品",
          "icon": "https://cdn.uviewui.com/uview/common/classify/2/14.jpg",
          "cat": 6
        }
        ]
    },
    {
        "name": "美妆",
        "foods": [
            {
                "name": "化妆刷",
                "key": "化妆刷",
                "icon": "https://cdn.uviewui.com/uview/common/classify/3/1.jpg",
                "cat": 3
            },
            {
                "name": "粉底",
                "key": "粉底",
                "icon": "https://cdn.uviewui.com/uview/common/classify/3/2.jpg",
                "cat": 3
            },
            {
                "name": "洗发护发",
                "key": "洗发护发",
                "icon": "https://cdn.uviewui.com/uview/common/classify/3/3.jpg",
                "cat": 3
            },
            {
                "name": "美容工具",
                "key": "美容工具",
                "icon": "https://cdn.uviewui.com/uview/common/classify/3/4.jpg",
                "cat": 3
            },
            {
                "name": "眼部护理",
                "key": "眼部护理",
                "icon": "https://cdn.uviewui.com/uview/common/classify/3/5.jpg",
                "cat": 3
            },
            {
                "name": "眉妆",
                "key": "眉妆",
                "icon": "https://cdn.uviewui.com/uview/common/classify/3/6.jpg",
                "cat": 3
            },
            {
                "name": "卸妆品",
                "key": "卸妆品",
                "icon": "https://cdn.uviewui.com/uview/common/classify/3/7.jpg",
                "cat": 3
            },
            {
                "name": "基础护肤",
                "key": "基础护肤",
                "icon": "https://cdn.uviewui.com/uview/common/classify/3/8.jpg",
                "cat": 3
            },
            {
                "name": "眼妆",
                "key": "眼妆",
                "icon": "https://cdn.uviewui.com/uview/common/classify/3/9.jpg",
                "cat": 3
            },
            {
                "name": "唇妆",
                "key": "唇妆",
                "icon": "https://cdn.uviewui.com/uview/common/classify/3/10.jpg",
                "cat": 3
            },
            {
                "name": "面膜",
                "key": "面膜",
                "icon": "https://cdn.uviewui.com/uview/common/classify/3/11.jpg",
                "cat": 3
            },
            {
                "name": "沐浴用品",
                "key": "沐浴用品",
                "icon": "https://cdn.uviewui.com/uview/common/classify/3/12.jpg",
                "cat": 3
            },
            {
                "name": "护肤套装",
                "key": "护肤套装",
                "icon": "https://cdn.uviewui.com/uview/common/classify/3/13.jpg",
                "cat": 3
            },
            {
                "name": "防晒品",
                "key": "防晒品",
                "icon": "https://cdn.uviewui.com/uview/common/classify/3/14.jpg",
                "cat": 3
            },
            {
                "name": "美甲",
                "key": "美甲",
                "icon": "https://cdn.uviewui.com/uview/common/classify/3/15.jpg",
                "cat": 3
            }

        ]
    },
    {
        "name": "居家日用",
        "foods": [
            {
              "name": "垃圾袋",
              "key": "垃圾袋",
              "icon": "https://cdn.uviewui.com/uview/common/classify/4/1.jpg",
              "cat": 4
            },
            {
                "name": "纸巾",
                "key": "纸巾",
                "icon": "https://cdn.uviewui.com/uview/common/classify/4/2.jpg",
                "cat": 4
            },
            {
                "name": "驱蚊用品",
                "key": "驱蚊用品",
                "icon": "https://cdn.uviewui.com/uview/common/classify/4/3.jpg",
                "cat": 4
            },
            {
                "name": "收纳神器",
                "key": "收纳神器",
                "icon": "https://cdn.uviewui.com/uview/common/classify/4/4.jpg",
                "cat": 4
            },
            {
                "name": "厨房用品",
                "key": "厨房用品",
                "icon": "https://cdn.uviewui.com/uview/common/classify/4/5.jpg",
                "cat": 4
            },
            {
                "name": "厨房烹饪",
                "key": "烹饪",
                "icon": "https://cdn.uviewui.com/uview/common/classify/4/6.jpg",
                "cat": 4
            },
            {
                "name": "衣物晾晒",
                "key": "衣物晾晒",
                "icon": "https://cdn.uviewui.com/uview/common/classify/4/7.jpg",
                "cat": 4
            },
            {
                "name": "衣物护理",
                "key": "衣物护理",
                "icon": "https://cdn.uviewui.com/uview/common/classify/4/8.jpg",
                "cat": 4
            },
            {
                "name": "宠物用品",
                "key": "宠物用品",
                "icon": "https://cdn.uviewui.com/uview/common/classify/4/9.jpg",
                "cat": 4
            },
            {
                "name": "医药保健",
                "key": "医药",
                "icon": "https://cdn.uviewui.com/uview/common/classify/4/10.jpg",
                "cat": 4
            },
            {
                "name": "日用百货",
                "key": "百货",
                "icon": "https://cdn.uviewui.com/uview/common/classify/4/11.jpg",
                "cat": 4
            },
            {
                "name": "清洁用品",
                "key": "清洁",
                "icon": "https://cdn.uviewui.com/uview/common/classify/4/12.jpg",
                "cat": 4
            },
            {
                "name": "绿植园艺",
                "key": "绿植",
                "icon": "https://cdn.uviewui.com/uview/common/classify/4/13.jpg",
                "cat": 4
            }
        ]
    },
    {
        "name": "男装",
        "foods": [
            {
                "name": "爸爸装",
                "key": "爸爸装",
                "icon": "https://cdn.uviewui.com/uview/common/classify/5/1.jpg",
                "cat": 12
            },
            {
                "name": "牛仔裤",
                "key": "牛仔裤",
                "icon": "https://cdn.uviewui.com/uview/common/classify/5/2.jpg",
                "cat": 12
            },
            {
                "name": "衬衫",
                "key": "衬衫",
                "icon": "https://cdn.uviewui.com/uview/common/classify/5/3.jpg",
                "cat": 12
            },
            {
                "name": "休闲裤",
                "key": "休闲裤",
                "icon": "https://cdn.uviewui.com/uview/common/classify/5/4.jpg",
                "cat": 12
            },
            {
                "name": "外套",
                "key": "外套",
                "icon": "https://cdn.uviewui.com/uview/common/classify/5/5.jpg",
                "cat": 12
            },
            {
                "name": "T恤",
                "key": "T恤",
                "icon": "https://cdn.uviewui.com/uview/common/classify/5/6.jpg",
                "cat": 12
            },
            {
                "name": "套装",
                "key": "套装",
                "icon": "https://cdn.uviewui.com/uview/common/classify/5/7.jpg",
                "cat": 12
            },
            {
                "name": "运动裤",
                "key": "运动裤",
                "icon": "https://cdn.uviewui.com/uview/common/classify/5/8.jpg",
                "cat": 12
            },
            {
                "name": "马甲/背心",
                "key": "马甲背心",
                "icon": "https://cdn.uviewui.com/uview/common/classify/5/9.jpg",
                "cat": 12
            },
            {
                "name": "POLO衫",
                "key": "POLO衫",
                "icon": "https://cdn.uviewui.com/uview/common/classify/5/10.jpg",
                "cat": 12
            },
            {
                "name": "商务装",
                "key": "商务装",
                "icon": "https://cdn.uviewui.com/uview/common/classify/5/11.jpg",
                "cat": 12
            }
        ]
    },
    {
        "name": "鞋品",
        "foods": [
            {
                "name": "单鞋",
                "key": "单鞋",
                "icon": "https://cdn.uviewui.com/uview/common/classify/6/1.jpg",
                "cat": 5
            },
            {
                "name": "皮鞋",
                "key": "皮鞋",
                "icon": "https://cdn.uviewui.com/uview/common/classify/6/2.jpg",
                "cat": 5
            },
            {
                "name": "帆布鞋",
                "key": "帆布鞋",
                "icon": "https://cdn.uviewui.com/uview/common/classify/6/3.jpg",
                "cat": 5
            },
            {
                "name": "北京老布鞋",
                "key": "北京老布鞋",
                "icon": "https://cdn.uviewui.com/uview/common/classify/6/4.jpg",
                "cat": 5
            },
            {
                "name": "运动鞋",
                "key": "运动鞋",
                "icon": "https://cdn.uviewui.com/uview/common/classify/6/5.jpg",
                "cat": 5
            },
            {
                "name": "拖鞋",
                "key": "拖鞋",
                "icon": "https://cdn.uviewui.com/uview/common/classify/6/6.jpg",
                "cat": 5
            },
            {
                "name": "凉鞋",
                "key": "凉鞋",
                "icon": "https://cdn.uviewui.com/uview/common/classify/6/7.jpg",
                "cat": 5
            },
            {
                "name": "休闲鞋",
                "key": "休闲鞋",
                "icon": "https://cdn.uviewui.com/uview/common/classify/6/8.jpg",
                "cat": 5
            },
            {
                "name": "高跟鞋",
                "key": "高跟鞋",
                "icon": "https://cdn.uviewui.com/uview/common/classify/6/9.jpg",
                "cat": 5
            },
            {
                "name": "老人鞋",
                "key": "老人鞋",
                "icon": "https://cdn.uviewui.com/uview/common/classify/6/10.jpg",
                "cat": 5
            },
            {
                "name": "懒人鞋",
                "key": "懒人鞋",
                "icon": "https://cdn.uviewui.com/uview/common/classify/6/11.jpg",
                "cat": 5
            }
        ]
    },
    {
        "name": "数码家电",
        "foods": [
            {
                "name": "数据线",
                "key": "数据线",
                "icon": "https://cdn.uviewui.com/uview/common/classify/7/1.jpg",
                "cat": 8
            },
            {
                "name": "耳机",
                "key": "耳机",
                "icon": "https://cdn.uviewui.com/uview/common/classify/7/2.jpg",
                "cat": 8
            },
            {
                "name": "生活家电",
                "key": "家电",
                "icon": "https://cdn.uviewui.com/uview/common/classify/7/3.jpg",
                "cat": 8
            },
            {
                "name": "电风扇",
                "key": "电风扇",
                "icon": "https://cdn.uviewui.com/uview/common/classify/7/4.jpg",
                "cat": 8
            },
            {
                "name": "电吹风",
                "key": "电吹风",
                "icon": "https://cdn.uviewui.com/uview/common/classify/7/5.jpg",
                "cat": 8
            },
            {
                "name": "手机壳",
                "key": "手机壳",
                "icon": "https://cdn.uviewui.com/uview/common/classify/7/6.jpg",
                "cat": 8
            },
            {
                "name": "榨汁机",
                "key": "榨汁机",
                "icon": "https://cdn.uviewui.com/uview/common/classify/7/7.jpg",
                "cat": 8
            },
            {
                "name": "小家电",
                "key": "小家电",
                "icon": "https://cdn.uviewui.com/uview/common/classify/7/8.jpg",
                "cat": 8
            },
            {
                "name": "数码电子",
                "key": "数码",
                "icon": "https://cdn.uviewui.com/uview/common/classify/7/9.jpg",
                "cat": 8
            },
            {
                "name": "电饭锅",
                "key": "电饭锅",
                "icon": "https://cdn.uviewui.com/uview/common/classify/7/10.jpg",
                "cat": 8
            },
            {
                "name": "手机支架",
                "key": "手机支架",
                "icon": "https://cdn.uviewui.com/uview/common/classify/7/11.jpg",
                "cat": 8
            },
            {
                "name": "剃须刀",
                "key": "剃须刀",
                "icon": "https://cdn.uviewui.com/uview/common/classify/7/12.jpg",
                "cat": 8
            },
            {
                "name": "充电宝",
                "key": "充电宝",
                "icon": "https://cdn.uviewui.com/uview/common/classify/7/13.jpg",
                "cat": 8
            },
            {
                "name": "手机配件",
                "key": "手机配件",
                "icon": "https://cdn.uviewui.com/uview/common/classify/7/14.jpg",
                "cat": 8
            }
        ]
    },
    {
        "name": "母婴",
        "foods": [
            {
              "name": "婴童服饰",
              "key": "衣服",
              "icon": "https://cdn.uviewui.com/uview/common/classify/8/1.jpg",
              "cat": 2  
            },
            {
                "name": "玩具乐器",
                "key": "玩具乐器",
                "icon": "https://cdn.uviewui.com/uview/common/classify/8/2.jpg",
                "cat": 2  
            },
            {
                "name": "尿不湿",
                "key": "尿不湿",
                "icon": "https://cdn.uviewui.com/uview/common/classify/8/3.jpg",
                "cat": 2  
            },
            {
                "name": "安抚牙胶",
                "key": "安抚牙胶",
                "icon": "https://cdn.uviewui.com/uview/common/classify/8/4.jpg",
                "cat": 2  
            },
            {
                "name": "奶瓶奶嘴",
                "key": "奶瓶奶嘴",
                "icon": "https://cdn.uviewui.com/uview/common/classify/8/5.jpg",
                "cat": 2  
            },
            {
                "name": "孕妈用品",
                "key": "孕妈用品",
                "icon": "https://cdn.uviewui.com/uview/common/classify/8/6.jpg",
                "cat": 2  
            },
            {
                "name": "宝宝用品",
                "key": "宝宝用品",
                "icon": "https://cdn.uviewui.com/uview/common/classify/8/7.jpg",
                "cat": 2  
            },
            {
                "name": "婴童湿巾",
                "key": "湿巾",
                "icon": "https://cdn.uviewui.com/uview/common/classify/8/8.jpg",
                "cat": 2  
            },
            {
                "name": "喂养洗护",
                "key": "洗护",
                "icon": "https://cdn.uviewui.com/uview/common/classify/8/9.jpg",
                "cat": 2  
            },
            {
                "name": "婴童鞋靴",
                "key": "童鞋",
                "icon": "https://cdn.uviewui.com/uview/common/classify/8/10.jpg",
                "cat": 2  
            },
            {
                "name": "口水巾",
                "key": "口水巾",
                "icon": "https://cdn.uviewui.com/uview/common/classify/8/11.jpg",
                "cat": 2  
            },
            {
                "name": "营养辅食",
                "key": "营养",
                "icon": "https://cdn.uviewui.com/uview/common/classify/8/12.jpg",
                "cat": 2  
            },
            {
                "name": "婴幼书籍",
                "key": "书籍",
                "icon": "https://cdn.uviewui.com/uview/common/classify/8/13.jpg",
                "cat": 2  
            },
            {
                "name": "婴儿车",
                "key": "婴儿车",
                "icon": "https://cdn.uviewui.com/uview/common/classify/8/14.jpg",
                "cat": 2  
            }
        ]
    },
    {
        "name": "箱包",
        "foods": [
            {
                "name": "单肩包",
                "key": "单肩包",
                "icon": "https://cdn.uviewui.com/uview/common/classify/9/1.jpg",
                "cat": 0
            },
            {
                "name": "斜挎包",
                "key": "斜挎包",
                "icon": "https://cdn.uviewui.com/uview/common/classify/9/2.jpg",
                "cat": 0
            },
            {
                "name": "女包",
                "key": "女包",
                "icon": "https://cdn.uviewui.com/uview/common/classify/9/3.jpg",
                "cat": 0
            },
            {
                "name": "男包",
                "key": "男包",
                "icon": "https://cdn.uviewui.com/uview/common/classify/9/4.jpg",
                "cat": 0
            },
            {
                "name": "双肩包",
                "key": "双肩包",
                "icon": "https://cdn.uviewui.com/uview/common/classify/9/5.jpg",
                "cat": 0
            },
            {
                "name": "小方包",
                "key": "小方包",
                "icon": "https://cdn.uviewui.com/uview/common/classify/9/6.jpg",
                "cat": 0
            },
            {
                "name": "钱包",
                "key": "钱包",
                "icon": "https://cdn.uviewui.com/uview/common/classify/9/7.jpg",
                "cat": 0
            },
            {
                "name": "旅行箱包",
                "key": "旅行箱包",
                "icon": "https://cdn.uviewui.com/uview/common/classify/9/8.jpg",
                "cat": 0
            },
            {
                "name": "零钱包",
                "key": "零钱包",
                "icon": "https://cdn.uviewui.com/uview/common/classify/9/9.jpg",
                "cat": 0
            },
            {
                "name": "手提包",
                "key": "手提包",
                "icon": "https://cdn.uviewui.com/uview/common/classify/9/10.jpg",
                "cat": 0
            },
            {
                "name": "胸包",
                "key": "胸包",
                "icon": "https://cdn.uviewui.com/uview/common/classify/9/11.jpg",
                "cat": 0
            }
        ]
    },
    {
        "name": "内衣",
        "foods": [
            {
                "name": "袜子",
                "key": "袜子",
                "icon": "https://cdn.uviewui.com/uview/common/classify/10/1.jpg",
                "cat": 11
            },
            {
                "name": "吊带背心",
                "key": "吊带背心",
                "icon": "https://cdn.uviewui.com/uview/common/classify/10/2.jpg",
                "cat": 11
            },
            {
                "name": "抹胸",
                "key": "抹胸",
                "icon": "https://cdn.uviewui.com/uview/common/classify/10/3.jpg",
                "cat": 11
            },
            {
                "name": "内裤",
                "key": "内裤",
                "icon": "https://cdn.uviewui.com/uview/common/classify/10/4.jpg",
                "cat": 11
            },
            {
                "name": "文胸",
                "key": "文胸",
                "icon": "https://cdn.uviewui.com/uview/common/classify/10/5.jpg",
                "cat": 11
            },
            {
                "name": "文胸套装",
                "key": "文胸套装",
                "icon": "https://cdn.uviewui.com/uview/common/classify/10/6.jpg",
                "cat": 11
            },
            {
                "name": "打底塑身",
                "key": "打底塑身",
                "icon": "https://cdn.uviewui.com/uview/common/classify/10/7.jpg",
                "cat": 11
            },
            {
                "name": "家居服",
                "key": "家居服",
                "icon": "https://cdn.uviewui.com/uview/common/classify/10/8.jpg",
                "cat": 11
            },
            {
                "name": "船袜",
                "key": "船袜",
                "icon": "https://cdn.uviewui.com/uview/common/classify/10/9.jpg",
                "cat": 11
            },
            {
                "name": "情侣睡衣",
                "key": "情侣睡衣",
                "icon": "https://cdn.uviewui.com/uview/common/classify/10/10.jpg",
                "cat": 11
            },
            {
                "name": "丝袜",
                "key": "丝袜",
                "icon": "https://cdn.uviewui.com/uview/common/classify/10/11.jpg",
                "cat": 11
            }
        ]
    },
    {
        "name": "文娱车品",
        "foods": [
            {
                "name": "车市车品",
                "key": "车市车品",
                "icon": "https://cdn.uviewui.com/uview/common/classify/11/1.jpg",
                "cat": 7
            },
            {
                "name": "办公文具",
                "key": "办公文具",
                "icon": "https://cdn.uviewui.com/uview/common/classify/11/2.jpg",
                "cat": 7
            },
            {
                "name": "考试必备",
                "key": "考试必备",
                "icon": "https://cdn.uviewui.com/uview/common/classify/11/3.jpg",
                "cat": 7
            },
            {
                "name": "笔记本",
                "key": "笔记本",
                "icon": "https://cdn.uviewui.com/uview/common/classify/11/4.jpg",
                "cat": 7
            },
            {
                "name": "艺术礼品",
                "key": "礼品",
                "icon": "https://cdn.uviewui.com/uview/common/classify/11/5.jpg",
                "cat": 7
            },
            {
                "name": "书写工具",
                "key": "书写工具",
                "icon": "https://cdn.uviewui.com/uview/common/classify/11/6.jpg",
                "cat": 7
            },
            {
                "name": "车载电器",
                "key": "车载电器",
                "icon": "https://cdn.uviewui.com/uview/common/classify/11/7.jpg",
                "cat": 7
            },
            {
                "name": "图书音像",
                "key": "图书音像",
                "icon": "https://cdn.uviewui.com/uview/common/classify/11/8.jpg",
                "cat": 7
            },
            {
                "name": "画具画材",
                "key": "画具画材",
                "icon": "https://cdn.uviewui.com/uview/common/classify/11/9.jpg",
                "cat": 7
            }
        ]
    },
    {
        "name": "配饰",
        "foods": [
            {
                "name": "太阳镜",
                "key": "太阳镜",
                "icon": "https://cdn.uviewui.com/uview/common/classify/12/1.jpg",
                "cat": 0
            },
            {
                "name": "皮带",
                "key": "皮带",
                "icon": "https://cdn.uviewui.com/uview/common/classify/12/2.jpg",
                "cat": 0
            },
            {
                "name": "棒球帽",
                "key": "棒球帽",
                "icon": "https://cdn.uviewui.com/uview/common/classify/12/3.jpg",
                "cat": 0
            },
            {
                "name": "手表",
                "key": "手表",
                "icon": "https://cdn.uviewui.com/uview/common/classify/12/4.jpg",
                "cat": 0
            },
            {
                "name": "发饰",
                "key": "发饰",
                "icon": "https://cdn.uviewui.com/uview/common/classify/12/5.jpg",
                "cat": 0
            },
            {
                "name": "项链",
                "key": "项链",
                "icon": "https://cdn.uviewui.com/uview/common/classify/12/6.jpg",
                "cat": 0
            },
            {
                "name": "手饰",
                "key": "手饰",
                "icon": "https://cdn.uviewui.com/uview/common/classify/12/7.jpg",
                "cat": 0
            },
            {
                "name": "耳环",
                "key": "耳环",
                "icon": "https://cdn.uviewui.com/uview/common/classify/12/8.jpg",
                "cat": 0
            },
            {
                "name": "帽子丝巾",
                "key": "帽子丝巾",
                "icon": "https://cdn.uviewui.com/uview/common/classify/12/9.jpg",
                "cat": 0
            },
            {
                "name": "眼镜墨镜",
                "key": "眼镜墨镜",
                "icon": "https://cdn.uviewui.com/uview/common/classify/12/10.jpg",
                "cat": 0
            },
            {
                "name": "发带发箍",
                "key": "发带发箍",
                "icon": "https://cdn.uviewui.com/uview/common/classify/12/11.jpg",
                "cat": 0
            }
        ]
    },
    {
        "name": "家装家纺",
        "foods": [
            {
                "name": "家居饰品",
                "key": "家居饰品",
                "icon": "https://cdn.uviewui.com/uview/common/classify/13/1.jpg",
                "cat": 0
            },
            {
                "name": "凉席",
                "key": "凉席",
                "icon": "https://cdn.uviewui.com/uview/common/classify/13/2.jpg",
                "cat": 0
            },
            {
                "name": "背枕靠枕",
                "key": "靠枕",
                "icon": "https://cdn.uviewui.com/uview/common/classify/13/3.jpg",
                "cat": 0
            },
            {
                "name": "床上用品",
                "key": "床上用品",
                "icon": "https://cdn.uviewui.com/uview/common/classify/13/4.jpg",
                "cat": 0
            },
            {
                "name": "摆件",
                "key": "摆件",
                "icon": "https://cdn.uviewui.com/uview/common/classify/13/5.jpg",
                "cat": 0
            },
            {
                "name": "四件套",
                "key": "四件套",
                "icon": "https://cdn.uviewui.com/uview/common/classify/13/6.jpg",
                "cat": 0
            },
            {
                "name": "装饰品",
                "key": "装饰品",
                "icon": "https://cdn.uviewui.com/uview/common/classify/13/7.jpg",
                "cat": 0
            },
            {
                "name": "卫浴用品",
                "key": "卫浴",
                "icon": "https://cdn.uviewui.com/uview/common/classify/13/8.jpg",
                "cat": 0
            },
            {
                "name": "家居家装",
                "key": "家具",
                "icon": "https://cdn.uviewui.com/uview/common/classify/13/9.jpg",
                "cat": 0
            },
            {
                "name": "蚊帐",
                "key": "蚊帐",
                "icon": "https://cdn.uviewui.com/uview/common/classify/13/10.jpg",
                "cat": 0
            },
            {
                "name": "墙纸贴纸",
                "key": "墙纸",
                "icon": "https://cdn.uviewui.com/uview/common/classify/13/11.jpg",
                "cat": 0
            },
            {
                "name": "空调被",
                "key": "空调被",
                "icon": "https://cdn.uviewui.com/uview/common/classify/13/12.jpg",
                "cat": 0
            }
        ]
    },
    {
        "name": "户外运动",
        "foods": [
            {
                "name": "游泳装备",
                "key": "游泳",
                "icon": "https://cdn.uviewui.com/uview/common/classify/14/1.jpg",
                "cat": 0
            },
            {
                "name": "泳镜",
                "key": "泳镜",
                "icon": "https://cdn.uviewui.com/uview/common/classify/14/2.jpg",
                "cat": 0
            },
            {
                "name": "户外装备",
                "key": "户外",
                "icon": "https://cdn.uviewui.com/uview/common/classify/14/3.jpg",
                "cat": 0
            },
            {
                "name": "健身服饰",
                "key": "健身",
                "icon": "https://cdn.uviewui.com/uview/common/classify/14/4.jpg",
                "cat": 0
            },
            {
                "name": "泳衣",
                "key": "泳衣",
                "icon": "https://cdn.uviewui.com/uview/common/classify/14/5.jpg",
                "cat": 0
            },
            {
                "name": "瑜伽垫",
                "key": "瑜伽垫",
                "icon": "https://cdn.uviewui.com/uview/common/classify/14/6.jpg",
                "cat": 0
            },
            {
                "name": "瑜伽用品",
                "key": "瑜伽",
                "icon": "https://cdn.uviewui.com/uview/common/classify/14/7.jpg",
                "cat": 0
            },
            {
                "name": "健身装备",
                "key": "健身",
                "icon": "https://cdn.uviewui.com/uview/common/classify/14/8.jpg",
                "cat": 0
            },
            {
                "name": "球迷用品",
                "key": "球迷",
                "icon": "https://cdn.uviewui.com/uview/common/classify/14/9.jpg",
                "cat": 0
            }
        ]
    }
] 

代码

<template>
	<view class="u-wrap">
		<view class="u-search-box">
			<view class="u-search-inner">
				<!-- <uv-icon name="search" color="#909399" :size="28"></u-icon> -->
				<text class="u-search-text">搜索</text>
			</view>
		</view>
		<view class="u-menu-wrap">
			<scroll-view scroll-y scroll-with-animation class="u-tab-view menu-scroll-view" :scroll-top="scrollTop"
				:scroll-into-view="itemId">
				<view v-for="(item,index) in tabbar" :key="index" class="u-tab-item"
					:class="[current == index ? 'u-tab-item-active' : '']" @tap.stop="swichMenu(index)">
					<text class="u-line-1">{{item.name}}</text>
				</view>
			</scroll-view>
			<scroll-view :scroll-top="scrollRightTop" scroll-y scroll-with-animation class="right-box" @scroll="rightScroll">
				<view class="page-view">
					<view class="class-item" :id="'item' + index" v-for="(item , index) in tabbar" :key="index">
						<view class="item-title">
							<text>{{item.name}}</text>
						</view>
						<view class="item-container">
							<view class="thumb-box" v-for="(item1, index1) in item.foods" :key="index1">
								<image class="item-menu-image" :src="item1.icon" mode=""></image>
								<view class="item-menu-name">{{item1.name}}</view>
							</view>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>
<script setup>
	import {
		onLoad,
		onShow,
		onReady
	} from '@dcloudio/uni-app'
	import {
		ref,
		nextTick
	} from 'vue'
	import classifyData from '@/utils/classify.data.js';
	const scrollTop = ref(0) //tab标题的滚动条位置
	const oldScrollTop = ref(0)
	const current = ref(0) //预设当前项的值
	const menuHeight = ref(0) //tab左边菜单的高度
	const menuItemHeight = ref(0) //左边菜单item的高度
	const itemId = ref('') //栏目右边scroll-view用于滚动的id
	const tabbar = ref(classifyData)
	const menuItemPos = ref([]) //tab标题的滚动条位置
	const arr = ref([]) //tab标题的滚动条位置
	const scrollRightTop = ref(0) // 右边栏目scroll-view的滚动条高度
	const timer = ref(null) // 定时器

	onReady(() => {
		// 获取每一项的top
		getMenuItemTop()
	})

	// 点击左边的栏目切换
	const swichMenu = async (index) => {
		if (arr.value.length == 0) {
			await getMenuItemTop();
		}
		if (index == current.value) return;
		scrollRightTop.value = oldScrollTop.value;
		nextTick(() => {
			scrollRightTop.value = arr.value[index];
			// scrollRightTop = newarrTop
			current.value = index;
			leftMenuStatus(index);
		})
	}

	// 获取一个目标元素的高度
	const getElRect = (elClass, dataVal) => {
		new Promise((resolve, reject) => {
			// const query = uni.createSelectorQuery().in(this);
			const query = uni.createSelectorQuery()
			query.select('.' + elClass).fields({
				size: true
			}, res => {
				// 如果节点尚未生成，res值为null，循环调用执行
				if (!res) {
					setTimeout(() => {
						getElRect(elClass);
					}, 10);
					return;
				}
				if (dataVal == 'menuHeight') {
					menuHeight.value = res.height;
				}
				if (dataVal == 'menuItemHeight') {
					menuItemHeight.value = res.height;
				}

				resolve();
			}).exec();
		})
	}

	// 观测元素相交状态
	const observer = async () => {
		tabbar.value.map((val, index) => {
			let observer = uni.createIntersectionObserver(this);
			// 检测右边scroll-view的id为itemxx的元素与right-box的相交状态
			// 如果跟.right-box底部相交，就动态设置左边栏目的活动状态
			observer.relativeTo('.right-box', {
				top: 0
			}).observe('#item' + index, res => {
				if (res.intersectionRatio > 0) {
					let id = res.id.substring(4);
					leftMenuStatus(id);
				}
			})
		})
	}

	// 设置左边菜单的滚动状态
	const leftMenuStatus = async (index) => {
		current.value = index;
		// 如果为0，意味着尚未初始化
		if (menuHeight.value == 0 || menuItemHeight.value == 0) {
			await getElRect('menu-scroll-view', 'menuHeight');
			await getElRect('u-tab-item', 'menuItemHeight');
		}
		console.log(index,arr.value[index]);
		// 将菜单活动item垂直居中
		scrollTop.value = index * menuItemHeight.value + menuItemHeight.value / 2 - menuHeight.value / 2;
	}

	// 右边菜单滚动
	const rightScroll = async (e) => {
		oldScrollTop.value = e.detail.scrollTop;
		if (arr.value.length == 0) {
			await getMenuItemTop();
		}
		if (timer.value) return;
		if (!menuHeight.value) {
			await getElRect('menu-scroll-view', 'menuHeight');
		}
		setTimeout(() => { // 节流
			timer.value = null;
			// scrollHeight为右边菜单垂直中点位置
			let scrollHeight = e.detail.scrollTop + menuHeight.value / 2;
			for (let i = 0; i < arr.value.length; i++) {
				let height1 = arr.value[i];
				let height2 = arr.value[i + 1];
				// 如果不存在height2，意味着数据循环已经到了最后一个，设置左边菜单为最后一项即可
				if (!height2 || scrollHeight >= height1 && scrollHeight < height2) {
					leftMenuStatus(i);
					return;
				}
			}
		}, 10)
	}

	// 获取右边菜单每个item到顶部的距离
	const getMenuItemTop = () => {
		new Promise(resolve => {
			let selectorQuery = uni.createSelectorQuery();
			console.log(selectorQuery);
			selectorQuery.selectAll('.class-item').boundingClientRect((rects) => {
				console.log(rects);
				// 如果节点尚未生成，rects值为[](因为用selectAll，所以返回的是数组)，循环调用执行
				if (!rects.length) {
					setTimeout(() => {
						getMenuItemTop();
					}, 10);
					return;
				}
				rects.forEach((rect) => {
					// 这里减去rects[0].top，是因为第一项顶部可能不是贴到导航栏(比如有个搜索框的情况)
					arr.value.push(rect.top - rects[0].top);
					resolve();
				})
			}).exec()
		})
	}
</script>


<style lang="scss" scoped>
	.u-wrap {
		height: calc(100vh);
		/* #ifdef H5 */
		height: calc(100vh - var(--window-top));
		/* #endif */
		display: flex;
		flex-direction: column;
	}

	.u-search-box {
		padding: 18rpx 30rpx;
	}

	.u-menu-wrap {
		flex: 1;
		display: flex;
		overflow: hidden;
	}

	.u-search-inner {
		background-color: rgb(234, 234, 234);
		border-radius: 100rpx;
		display: flex;
		align-items: center;
		padding: 10rpx 16rpx;
	}

	.u-search-text {
		font-size: 26rpx;
		color: #ccc;
		margin-left: 10rpx;
	}

	.u-tab-view {
		width: 200rpx;
		height: 100%;
	}

	.u-tab-item {
		height: 110rpx;
		background: #f6f6f6;
		box-sizing: border-box;
		display: flex;
		align-items: center;
		justify-content: center;
		font-size: 26rpx;
		color: #444;
		font-weight: 400;
		line-height: 1;
	}

	.u-tab-item-active {
		position: relative;
		color: #000;
		font-size: 30rpx;
		font-weight: 600;
		background: #fff;
	}

	.u-tab-item-active::before {
		content: "";
		position: absolute;
		border-left: 4px solid skyblue;
		height: 32rpx;
		left: 0;
		top: 39rpx;
	}

	.u-tab-view {
		height: 100%;
	}

	.right-box {
		background-color: rgb(250, 250, 250);
	}

	.page-view {
		padding: 16rpx;
	}

	.class-item {
		margin-bottom: 30rpx;
		background-color: #fff;
		padding: 16rpx;
		border-radius: 8rpx;
	}

	.class-item:last-child {
		min-height: 100vh;
	}

	.item-title {
		font-size: 26rpx;
		color: skyblue;
		font-weight: bold;
	}

	.item-menu-name {
		font-weight: normal;
		font-size: 24rpx;
		color: skyblue;
	}

	.item-container {
		display: flex;
		flex-wrap: wrap;
	}

	.thumb-box {
		width: 33.333333%;
		display: flex;
		align-items: center;
		justify-content: center;
		flex-direction: column;
		margin-top: 20rpx;
	}

	.item-menu-image {
		width: 120rpx;
		height: 120rpx;
	}
</style>