本文实例为大家分享了微信小程序实现跟随菜单效果、微信小程序循环嵌套加载数据，供大家参考，具体内容如下

效果如图：

代码如下：

wxml

//使用循环嵌套data数据格式写对即可<scroll-view class="left" scroll-y> <view wx:for="{{left}}" class="leftlist {{index==_click?'yes':''}}" data-i="{{index}}" bindtap="tap"> {{item.txt}} </view> </scroll-view><scroll-view class="right" scroll-y bindscroll="scroll" scroll-into-view="{{toView}}"> <view id="{{item.id}}" wx:for="{{right}}"> <view class="title"> <text class="line"></text> {{item.txt}} <text class="line"></text> </view> <view class="li" wx:for="{{item.li}}"> <image src="{{item.src}}"></image> <text class="name">{{item.name}}</text> </view> </view> </scroll-view>

js

Page({ data: { toView: 'red1', _click:0, left: [{ txt: '新品', id: 'new' }, { txt: '手机', id: 'phone' }, { txt: '电视', id: 'mv' }, { txt: '电脑', id: 'computer' }], right: [ { txt: '新品', id: 'new',li: [{ src: '../../assets/images/max1.jpg', name: '小米noto' }, { src: '../../assets/images/max1.jpg', name: '小米mix' }, { src: '../../assets/images/max3.jpg', name: '小米5c' }, { src: '../../assets/images/max2.jpg', name: '小米notp' }, { src: '../../assets/images/max2.jpg', name: '小米note5' }, { src: '../../assets/images/max2.jpg', name: '小米6' }]}, { txt: '手机', id: 'phone',li: [{ src: '../../assets/images/max2.jpg', name: '小米6s' }, { src: '../../assets/images/max3.jpg', name: '小米max' }, { src: '../../assets/images/max2.jpg', name: '小米5s' }, { src: '../../assets/images/max1.jpg', name: '小米li' }, { src: '../../assets/images/max3.jpg', name: '小米4' }, { src: '../../assets/images/max1.jpg', name: '小米max' }]}, { txt: '电视', id: 'mv', li: [{ src: '../../assets/images/max3.jpg', name: '小米6' }, { src: '../../assets/images/max2.jpg', name: '小米mix' }, { src: '../../assets/images/max1.jpg', name: '小米7s' }, { src: '../../assets/images/max3.jpg', name: '小米2' }, { src: '../../assets/images/max1.jpg', name: '小米note7' }, { src: '../../assets/images/max3.jpg', name: '小米8' }] }, { txt: '电脑', id: 'computer', li: [{ src: '../../assets/images/max1.jpg', name: '小米2' }, { src: '../../assets/images/max1.jpg', name: '小米mix' }, { src: '../../assets/images/max2.jpg', name: '小米max' }, { src: '../../assets/images/max1.jpg', name: '小米6' }, { src: '../../assets/images/max3.jpg', name: '小米note' }, { src: '../../assets/images/max1.jpg', name: '小米max' }] }] }, scroll: function (e) { console.log(e)//右侧列表滑动-左侧列表名称样式跟着改变，然而我不会写，搁置中，谁会告诉我，谢谢！ }, tap: function (e) { var j = parseInt(e.currentTarget.dataset.i); this.setData({ toView: this.data.left[j].id,//控制视图滚动到为此id的<view> _click:j //控制左侧点击后样式 }) },})

wxss

page{border-top:1px solid #f6f6f6;}.left{ height:100%; width: 19%; display: inline-block; background:#fff; text-align:center; border-right:1px solid #eee; }.leftlist{ font-size:12px; padding:10px; }.right{ height:100%; width: 80%; display: inline-block; background:#fff; text-align:center; }.line{ width:15px; height:1px; background:#ddd; display:inline-block; vertical-align:super; margin:0 15px;}.li{ height:10%; width:30%; display:inline-block; text-align:center;}.li image{width:60px;height:60px;}.li .name{ font-size:12px; display:block; color:#888; overflow:hidden; white-space:nowrap; text-overflow:ellipsis;}.title{padding:20px 0;}.yes{color: #f99;font-size: 14px;}

友情提示：

1、左侧点击样式改变：

利用自身index与点击的元素的index比较。
data-i=“{{获取当前index传给_click保存}}”，
class=”leftlist {{index==_click?'yes':”}}”，
此处index是自身的，如果自身和点击的一致就添加，yes类名，否侧滞空清除yes样式。

2、点击左侧，右侧跟随：

利用scroll-into-view=”{{id}}”， 视图会滚动到id为此id的view标签。我是直接从data数据里取得id，也可以直接获取点击元素id。

3、循环嵌套：data数据格式写对，按照官方文档就行。