微信小程序首页的分类功能和搜索功能的实现思路及代码详解
时间：2021-07-15 09:28:18|栏目：JavaScript代码|点击： 次
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分类功能和搜素功能的效果图
1.首页分类功能的实现
boxtwo方法（.js文件）
boxtwo: function (e) {
var index = parseInt(e.currentTarget.dataset.index)
this.setData({
HomeIndex: index
})
},
当在首页点击 分类导航时，会触发这个方法，并传回当前点击时的index值。
这个方法实现的是将.wxml文件传来的index值赋给HomeIndex。
class="boxtwo-tab-nav {{HomeIndex == 0 ?'on':''}}"
.wxss样式文件
.boxtwo-tab-nav{
display: inline-block;
width: 20%;
height: 90rpx;
line-height: 90rpx;
border-bottom: 1rpx solid #ededed;
box-sizing: border-box;
text-align: center;
color: black;
font-size: 30rpx
}
这样就实现了首页 当前点击的分类 呈现出 被选中的样式。
然后在视图层根据HomeIndex的不同，加载对应的数据。
<view wx:if="{{HomeIndex == 1}}" >
<block wx:for="{{shareList}}" wx:key="*this">
<navigator url='../../pages/shareDetail/shareDetail?id={{item.id}}' hover-class="navigator-hover">
<view class='imgs'>
<image src="{{item.img}}" background-size="cover" mode="scaleToFill"></image>
</view>
<view class='infos'>
<view class="title">{{item.title}}</view>
<view class="date">{{item.cTime}}</view>
</view>
</navigator>
</block>
</view>
<navigator></navigator>组件实现的是点击当前文章时传出id到详情页面（detail）。这样就把首页的文章列表和文章的详情页面一一对应起来了。
detail.js文件
onLoad: function (options) {
var that = this
wx.request({
url: 'http://localhost:81/weicms/index.php?s=/addon/School/School/getDetail',
data: {id:options.id},
header: {
'content-type': 'application/json'
},
success: function (res) {
wx.setStorage({
key: 'info',
data: res.data,
})
that.setData({
info: res.data
})
}
})
}
2.搜索功能的实现
.wxml文件
<view class='search-view'>
<input class='input' confirm-type="search" maxlength="30" bindinput='wxSearchInput' value='{{keyword}}' bindconfirm='wxSearchFn' bindfocus="wxSerchFocus" bindblur="wxSearchBlur" placeholder='请输入搜索内容'></input>
<button class='search' bindtap="wxSearchFn" hover-class='button-hover'>搜索</button>
</view>
JavaScript indexOf() 方法
indexOf() 方法可返回某个指定的字符串值在字符串中首次出现的位置。
key为搜索的关键字，res.data[i].title为首页列表的标题。使用indexOf()方法时，当满足了(res.data[i].title.indexOf(key) >= 0）说明说明输入的关键字在文章列表中
也有相同的关键字，然后arr.push(res.data[i])，这样就把筛选出来的文章放在了临时数组arr中了
//搜索方法 key为用户输入的查询字段
search: function (key) {
/*console.log('搜索函数触发')*/
var that = this;
var newsList = wx.getStorage({
key: 'newsList',
success: function (res) {//从storage中取出存储的数据*/
/*console.log(res)*/
if (key == '') {//用户没有输入 全部显示
that.setData({
newsList: res.data
})
return;
}
var arr = [];//临时数组 用于存放匹配到的数据
for (let i in res.data) {
if (res.data[i].title.indexOf(key) >= 0) {//查找
arr.push(res.data[i])
}
}
if (arr.length == 0) {
that.setData({
newsList:[]
})
} else {
that.setData({
newsList: arr//在页面显示找到的数据
})
}
}
})
}
//搜素时触发，调用search: function (key)，传入输入的e.detail.value值
wxSearchInput: function (e) {
this.search(e.detail.value);
}
index.wxml（首页）完整代码
<view class='search-view'>
<input class='input' confirm-type="search" maxlength="30" bindinput='wxSearchInput' value='{{keyword}}' bindconfirm='wxSearchFn' bindfocus="wxSerchFocus" bindblur="wxSearchBlur" placeholder='请输入搜索内容'></input>
<button class='search' bindtap="wxSearchFn" hover-class='button-hover'>搜索</button>
</view>
<view class="boxtwo-tab-nav {{HomeIndex == 0 ?'on':''}}" bindtap="boxtwo" data-index="0">首页</view>
<view class="boxtwo-tab-nav {{HomeIndex == 1 ?'on':''}}" bindtap="boxtwo" data-index="1">资源分享</view>
<view class="boxtwo-tab-nav {{HomeIndex == 2 ?'on':''}}" bindtap="boxtwo" data-index="2">微信小程序</view>
<view class="boxtwo-tab-nav {{HomeIndex == 3 ?'on':''}}" bindtap="boxtwo" data-index="3">网赚小项目</view>
<view class="boxtwo-tab-nav {{HomeIndex == 4 ?'on':''}}" bindtap="boxtwo" data-index="4">共享经济</view>
<view class="wrap">
<template name="lists">
<navigator url='../../pages/detail/detail?id={{id}}' hover-class="navigator-hover">
<view class='imgs'>
<image src="{{img}}" background-size="cover" mode="scaleToFill"></image>
</view>
<view class='infos'>
<view class="title">{{title}}</view>
<view class="date">{{cTime}}</view>
</view>
</navigator>
</template>
</view>
<view wx:if="{{HomeIndex == 0}}">
<block wx:for="{{newsList}}" wx:key="*this">
<template is="lists" data="{{...item}}"/>
</block>
</view>
<view wx:if="{{HomeIndex == 1}}" >
<block wx:for="{{shareList}}" wx:key="*this">
<navigator url='../../pages/shareDetail/shareDetail?id={{item.id}}' hover-class="navigator-hover">
<view class='imgs'>
<image src="{{item.img}}" background-size="cover" mode="scaleToFill"></image>
</view>
<view class='infos'>
<view class="title">{{item.title}}</view>
<view class="date">{{item.cTime}}</view>
</view>
</navigator>
</block>
</view>
<view wx:if="{{HomeIndex == 2}}" >
<block wx:for="{{weixinList}}" wx:key="*this">
<navigator url='../../pages/weixinDetail/weixinDetail?id={{item.id}}' hover-class="navigator-hover">
<view class='imgs'>
<image src="{{item.img}}" background-size="cover" mode="scaleToFill"></image>
</view>
<view class='infos'>
<view class="title">{{item.title}}</view>
<view class="date">{{item.cTime}}</view>
</view>
</navigator>
</block>
</view>
<view wx:if="{{HomeIndex == 3}}" >
<block wx:for="{{netearnList}}" wx:key="*this">
<navigator url='../../pages/netearnDetail/netearnDetail?id={{item.id}}' hover-class="navigator-hover">
<view class='imgs'>
<image src="{{item.img}}" background-size="cover" mode="scaleToFill"></image>
</view>
<view class='infos'>
<view class="title">{{item.title}}</view>
<view class="date">{{item.cTime}}</view>
</view>
</navigator>
</block>
</view>
<view wx:if="{{HomeIndex == 4}}" >
<block wx:for="{{economyList}}" wx:key="*this">
<navigator url='../../pages/economyDetail/economyDetail?id={{item.id}}' hover-class="navigator-hover">
<view class='imgs'>
<image src="{{item.img}}" background-size="cover" mode="scaleToFill"></image>
</view>
<view class='infos'>
<view class="title">{{item.title}}</view>
<view class="date">{{item.cTime}}</view>
</view>
</navigator>
</block>
</view>
index.wxss（对应的样式文件）
.wrap{
height: 100%;
display:flex;
flex-direction: column;
padding: 20rpx
}
navigator{overflow: hidden}
.list{
margin-bottom: 20rpx;
height: 200rpx;
position: relative;
}
.imgs{
float: left;
}
.imgs image{
display: block;
width: 210rpx;
height: 180rpx;
}
.boxtwo-tab-nav{
display: inline-block;
width: 20%;
height: 90rpx;
line-height: 90rpx;
border-bottom: 1rpx solid #ededed;
box-sizing: border-box;
text-align: center;
color: black;
font-size: 30rpx
}
.on{
color:#405F80;
border-bottom: 5rpx solid #405F80;
}
.infos{
float: left;
width: 480rpx;
height: 200rpx;
padding: 20rpx 0 0 20rpx;
}
.date{
font-size:13px;color:#aaa;position: absolute;
}
.title{font-size: 15px;}
.search{
float: left;
width: 130rpx;
height: 70rpx;
margin-left: 0;
background-color: blueviolet;
font-size: 28rpx;
color: #fff;
border: none;
}
.input{
float: left;
width: 500rpx;
height: 70rpx;
font-size: 35rpx;
background-color: white;
}
.search-view{
position: relative;
overflow: hidden;
height: 70rpx;
padding: 20rpx 20rpx 25rpx 60rpx;
background-color: #6699FF;
}
.button-hover {
background-color: red;
}
.js文件（逻辑层）
Page({
data:{
newsList:[],
HomeIndex: 0
},
onLoad: function () {
var that = this;
wx.request({
url: 'http://localhost:81/weicms/index.php?s=/addon/School/School/getList',
data: {},
header: {
'content-type': 'application/json'
},
success: function (res) {
console.log(res.data)
wx.setStorage({
key: 'newsList',
data: res.data,
})
that.setData({
newsList: res.data
})
}
})
wx.request({
url: 'http://localhost:81/weicms/index.php?s=/addon/Share/Share/getList',
data: {},
header: {
'content-type': 'application/json'
},
success: function (res) {
wx.setStorage({
key: 'sharesList',
data: res.data,
})
that.setData({
shareList: res.data
})
}
})
wx.request({
url: 'http://localhost:81/weicms/index.php?s=/addon/Weixin/Weixin/getList',
data: {},
header: {
'content-type': 'application/json'
},
success: function (res) {
wx.setStorage({
key: 'weixinList',
data: res.data,
})
that.setData({
weixinList: res.data
})
}
})
wx.request({
url: 'http://localhost:81/weicms/index.php?s=/addon/Netearn/Netearn/getList',
data: {},
header: {
'content-type': 'application/json'
},
success: function (res) {
wx.setStorage({
key: 'netearnList',
data: res.data,
})
that.setData({
netearnList: res.data
})
}
})
wx.request({
url: 'http://localhost:81/weicms/index.php?s=/addon/Economy/Economy/getList',
data: {},
header: {
'content-type': 'application/json'
},
success: function (res) {
wx.setStorage({
key: 'economyList',
data: res.data,
})
that.setData({
economyList: res.data
})
}
})
},
//搜索方法 key为用户输入的查询字段
search: function (key) {
/*console.log('搜索函数触发')*/
var that = this;
var newsList = wx.getStorage({
key: 'newsList',
success: function (res) {//从storage中取出存储的数据*/
/*console.log(res)*/
if (key == '') {//用户没有输入 全部显示
that.setData({
newsList: res.data
})
return;
}
var arr = [];//临时数组 用于存放匹配到的数据
for (let i in res.data) {
if (res.data[i].title.indexOf(key) >= 0) {//查找
arr.push(res.data[i])
}
}
if (arr.length == 0) {
that.setData({
newsList:[]
})
} else {
that.setData({
newsList: arr//在页面显示找到的数据
})
}
}
})
},
//事件处理函数
bindViewTap: function() {
wx.navigateTo({
url: '../logs/logs'
})
},
wxSearchInput: function (e) {
this.search(e.detail.value);
console.log(e.detail.value)
},
wxSerchFocus: function (e) {
this.search(e.detail.value);
},
wxSearchBlur: function (e) {
this.search(e.detail.value);
},
wxSearchFn: function (e) {
/*console.log(e)*/
},
boxtwo: function (e) {
var index = parseInt(e.currentTarget.dataset.index)
this.setData({
HomeIndex: index
})
},
总结
