使用hbuilder实现左右菜单联动功能

<template>

    <view class="cbcd">
        <scroll-view scroll-y scroll-with-animation class="u-tab-view menu-scroll-view" :scroll-top="scrollTop">
            <view v-for="(item,index) in tabbar" :key="index" :class="[current==index ? 'u-tab-item-active' : 'u-tab-item']"
                :data-current="index" @tap.stop="swichMenu(index)">
                <text>{{item.name}}</text>
            </view>
        </scroll-view>
        
        <block v-for="(item,index) in tabbar" :key="index">
            <scroll-view scroll-y v-if="current==index">
                <view>
                    <view>
                        <view>
                            <text>{{item.name}}</text>
                        </view>
                        <view>
                            <view v-for="(item1, index1) in item.foods" :key="index1">
                                <image :src="item1.icon" mode=""></image>
                                <view>{{item1.name}}</view>
                            </view>
                        </view>
                    </view>
                </view>
            </scroll-view>
        </block>
    </view>
</template>
<script>
    export default {
        data() {
            return {
                tabbar: [{
                        name: "人员详情",
                        foods: [{
                                name: ".net",
                                icon: "https://img.tnblog.net/bigclassimg/1net.png"
                            },
                            {
                                name: "java",
                                icon: "https://img.tnblog.net/bigclassimg/2CORE.png"
                            },
                            {
                                name: "python",
                                icon: "https://img.tnblog.net/bigclassimg/2CORE.png"
                            }
                        ]
                    },
                    {
                        name: "位置监控",
                        foods: [{
                                name: ".net",
                                icon: "https://img.tnblog.net/bigclassimg/1net.png"
                            },
                            {
                                name: "java",
                                icon: "https://img.tnblog.net/bigclassimg/python.png"
                            }
                        ]
                    },
                    {
                        name: "健康监控",
                        foods: [{
                                name: ".net",
                                icon: "https://img.tnblog.net/bigclassimg/1net.png"
                            },
                            {
                                name: "java",
                                icon: "https://img.tnblog.net/bigclassimg/mobile.png"
                            }
                        ]
                    },
                    {
                        name: "视频监控",
                        foods: [{
                                name: ".net",
                                icon: "https://img.tnblog.net/bigclassimg/1net.png"
                            },
                            {
                                name: "java",
                                icon: "https://img.tnblog.net/bigclassimg/2CORE.png"
                            }
                        ]
                    },
                    {
                        name: "就医记录",
                        foods: [{
                                name: ".net",
                                icon: "https://img.tnblog.net/bigclassimg/1net.png"
                            },
                            {
                                name: "java",
                                icon: "https://img.tnblog.net/bigclassimg/python.png"
                            }
                        ]
                    },
                    {
                        name: "报警信息",
                        foods: [{
                                name: ".net",
                                icon: "https://img.tnblog.net/bigclassimg/1net.png"
                            },
                            {
                                name: "java",
                                icon: "https://img.tnblog.net/bigclassimg/mobile.png"
                            }
                        ]
                    },
                    {
                        name: "周期报告",
                        foods: [{
                                name: ".net",
                                icon: "https://img.tnblog.net/bigclassimg/1net.png"
                            },
                            {
                                name: "java",
                                icon: "https://img.tnblog.net/bigclassimg/2CORE.png"
                            }
                        ]
                    }
                ],
                scrollTop: 0, //tab标题的滚动条位置
                current: 0, // 预设当前项的值
                menuHeight: 0, // 左边菜单的高度
                menuItemHeight: 0, // 左边菜单item的高度
            }
        },
        methods: {
            // 点击左边的栏目切换
            async swichMenu(index) {
                if (index == this.current) return;
                this.current = index;
                // 如果为0，意味着尚未初始化
                if (this.menuHeight == 0 || this.menuItemHeight == 0) {
                    await this.getElRect('menu-scroll-view', 'menuHeight');
                    await this.getElRect('u-tab-item', 'menuItemHeight');
                }
                // 将菜单菜单活动item垂直居中
                this.scrollTop = index * this.menuItemHeight + this.menuItemHeight / 2 - this.menuHeight / 2;
            },
            // 获取一个目标元素的高度
            getElRect(elClass, dataVal) {
                new Promise((resolve, reject) => {
                    const query = uni.createSelectorQuery().in(this);
                    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(() => {
                                this.getElRect(elClass);
                            }, 10);
                            return;
                        }
                        this[dataVal] = res.height;
                    }).exec();
                })
            }
        }
    }
</script>

<style scoped>
    .cbcd{
        display: flex;
    }
    .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: $u-tips-color;
        color: #909399;
        margin-left: 10rpx;
    }

    .u-tab-view {
        width: 250rpx;
        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;
        height: 110rpx;
        background: #fff;
        box-sizing: border-box;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: 400;
        line-height: 1;
    }
/* 
    .u-tab-item-active::before {
        content: "";
        position: absolute;
        // border-left: 4px solid $u-type-primary;
        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;
    }

    .item-title {
        font-size: 26rpx;
        // color: $u-main-color;
        color: #303133;
        font-weight: bold;
    }

    .item-menu-name {
        font-weight: normal;
        font-size: 24rpx;
        color: #303133;
        // color: $u-main-color;
    }

    .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>