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微信小程序首頁的分類功能和搜索功能的實(shí)現(xiàn)思路及代碼詳解

 更新時(shí)間：2018年09月11日 17:09:39   作者：耿星  
這篇文章主要介紹了微信小程序首頁的分類功能和搜索功能的實(shí)現(xiàn)思路及代碼詳解,微信宣布了微信小程序開發(fā)者工具新增“云開發(fā)”功能，現(xiàn)在無需服務(wù)器即可實(shí)現(xiàn)小程序的快速迭代，感興趣的朋友跟隨小編一起看看吧

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分類功能和搜素功能的效果圖

1.首頁分類功能的實(shí)現(xiàn)

boxtwo方法（.js文件）

boxtwo: function (e) {
  var index = parseInt(e.currentTarget.dataset.index)
  this.setData({
   HomeIndex: index
  })
 },

當(dāng)在首頁點(diǎn)擊 分類導(dǎo)航時(shí)，會觸發(fā)這個方法，并傳回當(dāng)前點(diǎn)擊時(shí)的index值。

這個方法實(shí)現(xiàn)的是將.wxml文件傳來的index值賦給HomeIndex。

class="boxtwo-tab-nav {{HomeIndex == 0 ?'on':''}}"

.wxss樣式文件

.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
}

這樣就實(shí)現(xiàn)了首頁 當(dāng)前點(diǎn)擊的分類 呈現(xiàn)出 被選中的樣式。

然后在視圖層根據(jù)HomeIndex的不同，加載對應(yīng)的數(shù)據(jù)。

<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>組件實(shí)現(xiàn)的是點(diǎn)擊當(dāng)前文章時(shí)傳出id到詳情頁面（detail）。這樣就把首頁的文章列表和文章的詳情頁面一一對應(yīng)起來了。

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.搜索功能的實(shí)現(xiàn)

.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='請輸入搜索內(nèi)容'></input>
  <button class='search' bindtap="wxSearchFn" hover-class='button-hover'>搜索</button>
</view>

JavaScript indexOf() 方法

   indexOf() 方法可返回某個指定的字符串值在字符串中首次出現(xiàn)的位置。

key為搜索的關(guān)鍵字，res.data[i].title為首頁列表的標(biāo)題。使用indexOf()方法時(shí)，當(dāng)滿足了(res.data[i].title.indexOf(key) >= 0）說明說明輸入的關(guān)鍵字在文章列表中

也有相同的關(guān)鍵字，然后arr.push(res.data[i])，這樣就把篩選出來的文章放在了臨時(shí)數(shù)組arr中了

//搜索方法 key為用戶輸入的查詢字段
 search: function (key) {
  /*console.log('搜索函數(shù)觸發(fā)')*/
  var that = this;
  var newsList = wx.getStorage({
   key: 'newsList',
   success: function (res) {//從storage中取出存儲的數(shù)據(jù)*/
   /*console.log(res)*/
    if (key == '') {//用戶沒有輸入 全部顯示
     that.setData({
      newsList: res.data
     })
     return;
    }
    var arr = [];//臨時(shí)數(shù)組 用于存放匹配到的數(shù)據(jù)
    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//在頁面顯示找到的數(shù)據(jù)
     })
    }
   }
  })
  }
//搜素時(shí)觸發(fā)，調(diào)用search: function (key)，傳入輸入的e.detail.value值
wxSearchInput: function (e) {
 this.search(e.detail.value);
}

index.wxml（首頁）完整代碼

<view class='search-view'>
  <input class='input' confirm-type="search" maxlength="30" bindinput='wxSearchInput' value='{{keyword}}' bindconfirm='wxSearchFn' bindfocus="wxSerchFocus" bindblur="wxSearchBlur" placeholder='請輸入搜索內(nèi)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">首頁</view>
  <view class="boxtwo-tab-nav {{HomeIndex == 1 ?'on':''}}" bindtap="boxtwo" data-index="1">資源分享</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">網(wǎng)賺小項(xiàng)目</view>
<view class="boxtwo-tab-nav {{HomeIndex == 4 ?'on':''}}" bindtap="boxtwo" data-index="4">共享經(jīng)濟(jì)</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（對應(yīng)的樣式文件）

.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（邏輯層）

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為用戶輸入的查詢字段
 search: function (key) {
  /*console.log('搜索函數(shù)觸發(fā)')*/
  var that = this;
  var newsList = wx.getStorage({
   key: 'newsList',
   success: function (res) {//從storage中取出存儲的數(shù)據(jù)*/
   /*console.log(res)*/
    if (key == '') {//用戶沒有輸入 全部顯示
     that.setData({
      newsList: res.data
     })
     return;
    }
    var arr = [];//臨時(shí)數(shù)組 用于存放匹配到的數(shù)據(jù)
    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//在頁面顯示找到的數(shù)據(jù)
     })
    }
   }
  })
  },
 //事件處理函數(shù)
 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
  })
 },

總結(jié)

以上所述是小編給大家介紹的微信小程序首頁的分類功能和搜索功能的實(shí)現(xiàn)思路及代碼詳解，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時(shí)回復(fù)大家的。在此也非常感謝大家對腳本之家網(wǎng)站的支持！

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