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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

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