微信小程序实现字母索引菜单

本文实例为大家分享了微信小程序实现字母索引菜单的具体代码，供大家参考，具体内容如下

wxml文件

<view class="container">

<view class="content">
? <view class="all-food">
? ? <view class="food">全部食物</view>
? ? ? <scroll-view class="food-scroll" scroll-y="true" scroll-into-view="{{toView}}" scroll-with-animation="true">
? ? ? ? <view class="food-list">

? ? ? ? ? ? <view wx:for="{{foodList}}" wx:key="{{index}}" id="{{'food'+index}}" ?data-title="{{item.title}}">
? ? ? ? ? ? ? <view class="nav-text">
? ? ? ? ? ? ? ? <text>{{item.title}}</text>
? ? ? ? ? ? ? </view>
? ? ? ? ? ? ? <view class="show-food">
? ? ? ? ? ? ? ? <text wx:for="{{item.lists}}" wx:key="{{index}}">{{item}}</text>
? ? ? ? ? ? ? </view>
? ? ? ? ? ? </view>

? ? ? ? </view>
? ? ? </scroll-view>
? ? </view>

? <view class="search-nav" ?bindtouchstart="touchStart" bindtouchmove="touchMove" bindtouchend="touchEnd">
? ? <text bindtap="foodScroll" data-index="{{index}}" wx:for="{{searchNav}}" wx:key="{{index}}">{{item}}</text>
? </view>
</view>
</view>

js文件

let foodList = require('utils/common');
Page({

? /**
? ?* 页面的初始数据
? ?*/
? data: {
? ? foodList:[],
? ? toView:'',
? ? searchNav:[]
? },

? getFoodList(){
?? ??? ?let searchNav = this.data.searchNav
?? ??? ?for(let i in foodList.foodList){
?? ??? ??? ?searchNav.push(foodList.foodList[i].title)
?? ??? ?}
?? ??? ?this.setData({
?? ??? ??? ?foodList:foodList.foodList,
?? ??? ??? ?searchNav:searchNav
?? ??? ?})

? },
??
? foodScroll(e){
?? ??? ?let index = e.currentTarget.dataset.index;
?? ??? ?this.setData({
?? ??? ??? ?toView:`food${index}`
?? ??? ?})

?? ?},
? /**
? ?* 生命周期函数--监听页面加载
? ?*/
? onLoad: function (options) {
? ? this.getFoodList();
? },

? /**
? ?* 生命周期函数--监听页面初次渲染完成
? ?*/
? onReady: function () {
? ??
? },

? /**
? ?* 生命周期函数--监听页面显示
? ?*/
? onShow: function () {
? ??
? },

? /**
? ?* 生命周期函数--监听页面隐藏
? ?*/
? onHide: function () {
? ??
? },

? /**
? ?* 生命周期函数--监听页面卸载
? ?*/
? onUnload: function () {
? ??
? },

? /**
? ?* 页面相关事件处理函数--监听用户下拉动作
? ?*/
? onPullDownRefresh: function () {
? ??
? },

? /**
? ?* 页面上拉触底事件的处理函数
? ?*/
? onReachBottom: function () {
? ??
? },

? /**
? ?* 用户点击右上角分享
? ?*/
? onShareAppMessage: function () {
? ??
? }
})

wxss文件

?/* pages/city/city.wxss */
?.container {
? padding: 0 5rpx;
? display: flex;
? justify-content:row;
? background-color: #fff;
}

.content{
? margin-top: 30rpx;
? width: 100%;
}

.food{
? font-size: 40rpx;
? padding-bottom: 10rpx;
? border-bottom: 1rpx solid #fff;
? height:30rpx;
? line-height:30rpx;

}

.food-scroll {
? left: 0;
? position: fixed;
? height: 100%;
? width: 720rpx;
}

.show-food{
? display: flex;
? flex-direction: column;
? justify-content: left;
??
}
.show-food text{
? margin-top: 10rpx;
? margin-bottom: 10rpx;
? font-size: 32rpx;
? border-bottom: 1rpx solid silver;
}

.search-nav{
? position: fixed;
? top: 120rpx;
? bottom: 5rpx;
? right: 5rpx;
? display:flex;
? flex-direction: column;
? justify-content: space-around;
}
.search-nav text{
? text-align: center;
? font-size: 24rpx;
}

common.js文件

let food = [?? ??
? {
? ? ? "title":"A",
? ? ? "lists":[
? ? ? "艾蒿"
? ? ? ? ]
? },
? {
? ? ? "title":"B",
? ? ? "lists":["白萝卜","白瓜","白菜","菠菜","白笋","百合","摈榔","白花菜","白沙蒿","百里香","豆腐柴","芭蕉","菠萝","白金瓜"
? ? ? ? ]
? },
? {
? ? ? "title":"C",
? ? ? "lists":["蚕豆","菜花","春笋","慈菇","刺儿菜","草菇","草莓","橙","茶肠","草鱼","鲳鱼"
? ? ? ? ]
? },
? {
? ? ? "title":"D",
? ? ? "lists":["豆腐","豆浆","豆腐脑","豆奶","豆汁","豆腐丝","豆腐卷","豆腐皮","豆腐干","豆干尖","豆沙","刀豆","豆角","冬瓜","大蒜","大葱","大白菜","冬寒菜","冬笋","豆瓣菜","大薯","大车前","地肤","大黄","大麻","大红菇","地衣","蛋清肠"
? ? ? ? ]
? },
? {
? ? ? "title":"E",
? ? ? "lists":["鹅肉","鹅肝","鹅腿","鹅蛋"]
? },
? {
? ? ? "title":"F",
? ? ? "lists":["粉丝","腐竹","番茄","方瓜","佛手瓜","分葱","发菜"
? ? ? ? ]
? ? ??
? },
? {
? ? ?"title":"G",
? ? ? "lists":["挂面","甘薯","甘蓝","观达菜","枸杞","柑","桂圆","橄榄","桂鱼","鲑鱼"]
? ? ?
? },
? {
? ? ?"title":"H",
? ? ? "lists":["花卷","黄豆","花豆","红萝卜","花叶萝卜","胡萝卜","荷兰豆","黄豆芽","葫子","葫芦","葫芦条","黄瓜","茴香","黑笋","花案菜","槐花","黄麻叶","苦苦菜","猴头菇","黄菇","海带","海棠","黄皮果","火腿肠","火鸡","火鸡肝","火鸡腿","黄油","黄鳝","鳇鱼","黄骨鱼"
? ? ? ?]
? },
? {
? ? ?"title":"J",
? ? ? "lists":["豇豆","芥菜头","节瓜","金瓜","金丝瓜","韭菜","韭黄","韭苔","金针菜","菊笋","茭白","姜","蕨菜","金针菇","鸡肉","鸡腿","鸡心","鸡翅","鸡肾","鸡脖"]
? ? ? ? ? ?
? },
? {
? ? ?"title":"K",
? ? ? "lists":["空锅饼","苦瓜","苦菜","口蘑","葵花籽"]

? },
? {
? ? ?"title":"L",
? ? ? "lists":["烙饼","绿豆饼","龙豆","绿豆芽","辣椒","萝卜缨","落葵","轮叶党参","罗勒","梨","梅","荔枝","栗子","腊肉","驴肉","驴鞭","驴心","骆驼肉","骆驼掌","骆驼蹄", ]

? },
? {
? ? ? "title":"M",
? ? ? "lists":["面条","馒头","木薯","梅豆","木豆","毛豆","毛笋","马蹄","马齿苋","马兰头","麦瓶草",
? ? ? "蘑菇","木耳","面蛋","芒果","木瓜","马肉","马心"
? ]
? },
? {
? ? ?"title":"N",
? ? ? "lists":["脑豆","奶茄子","南瓜","牛至","柠檬","牛肉","牛肋","牛腿","牛里脊","牛蹄筋", "牛鞭","牛肚","牛肝","牛肺","牛脑","牛骨","牛大肠","牛心","牛肾","牛肉干", "牛肉松",
? ? ? ? ? ? ? ? ? ? ]
? },
? {
? ?"title":"O",
? ? ? "lists":["藕粉","藕"]
? },
? {
? ? ?"title":"P",
? ? ? "lists":["扁豆","蒲菜","喷瓜","蒲公英","苹果","葡萄","葡萄干"]

? },
? {
? ? ?"title":"Q",
? ? ? "lists":["荞麦","青豆","茄子","秋葵","青蒜","芹菜","掐不齐","清明菜","球茎茴香","启明菜叶","青菇"
? ]
? },
? {
? ? ?"title":"R",
? ? ? "lists":["人参果","肉松","儿童肠"]
? },
? {
? ? ?"title":"S",
? ? ? "lists":["烧饼","水面筋","马铃薯","素火腿","素大肠","素鸡","素鸡丝卷","素什锦","四季豆","蛇瓜","丝瓜","笋瓜","蒜苗","生菜","水芹菜","山药","石头菜","沙参叶","松菇","沙果","酸刺","石榴","柿子","柿饼","桑葚"
? ? ? ?]
? ? ? ? ? ?
? },
? {
? ? ?"title":"T",
? ? ? "lists":["通心面","甜椒","甜菜叶","茼蒿","汤菜","土三七","苔菜","桃","甜瓜","兔肉"
? ? ? ?]
? },
? {
? ?"title":"W",
? ?"lists":["豌豆","乌菜","莴笋","歪头菜","梧桐子","无花果","午餐肉"
? ? ]
? },
? {
? ? ?"title":"X",
? ? ? "lists":["小豆粥","西葫芦","小葱","小白菜","西兰花","香菜","苋菜","夏枯草","香椿","香茅","小旋花","竹叶菜","香菇","香蕉","西瓜","杏仁","橡子","叉烧肉","咸肉","香肠"
? ? ? ?]
? ? ? ? ? ?
? },
? {
? ? ?"title":"Y",
? ? ? "lists":["油饼","油条","油面筋","薏米","玉米","芸豆","洋葱","油菜","芋头","洋姜","野葱","野韭菜","营野菊口","野蒜","野苋菜","榆钱","鱼腥草","羊肚菌","银耳","樱桃","柚","杨梅"
? ? ? ?]
? ? ?
? },
? {
? ? ? "title":"Z",
? ? ? "lists":["竹笋"," 榛子","珍珠白菇","紫菜","枣","猪肉","芝麻","猪大排","猪耳","猪蹄","猪头","猪肘","猪肺","猪肝","猪脑","猪皮","猪舌","猪腰","猪心","猪血"
? ? ? ?]
? }
? ?]
module.exports = {
? ?foodList:food
}

目录文件

效果

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