微信小程序(黑马优购:搜索)

时间：2024-04-03 14:26:46

一.自定义搜索组件

1.修正分类页面高度

获取高度应该减去搜索框占的50px

this.wh = sysInfo.windowHeight - 50

2.动态修改搜索框的背景颜色和圆角

  <my-search></my-search>
    <!-- <my-search :bgcolor=" 'green' " :radius="3"></my-search> -->

<template>
  <view class="my-search-container"
   :style="{ 'background-color': bgcolor }">
      <view class="my-search-box"
      :style="{ 'border-radius': radius + 'px'  }"
      
      >
          <!-- 使用uni-ui提供的图标组件 -->
          <uni-icons type="search" size="17"></uni-icons>
          <text class="placeholder">搜索</text>
      </view>
  </view>
</template>

<script>
  export default {
    props:{
      //背景颜色
      bgcolor: {
        type: String,
        default: "#C00000"
      },
      //圆角尺寸
      radius:{
        type: Number,
        default: 18 //px
      }
    },
    data() {
      return {
        
      };
    }
  }
</script>

3.点击搜索框触发事件 

<my-search @click="gotoSearch"></my-search>


  gotoSearch(){
        uni.navigateTo({
          url: '/subpkg/search/search'
        })
      }

<view class="my-search-container"
   :style="{ 'background-color': bgcolor }"
   @click="searchBoxHandler"
   >
      <view class="my-search-box"
      :style="{ 'border-radius': radius + 'px'  }"
      
      >
          <!-- 使用uni-ui提供的图标组件 -->
          <uni-icons type="search" size="17"></uni-icons>
          <text class="placeholder">搜索</text>
      </view>
  </view>




 methods:{
      searchBoxHandler(){
        // console.log("~~~");
        this.$emit('click')
      }
    }

4.首页搜索框

 <!-- 搜索组件 -->
    <view class="search-box">
      <my-search @click="gotoSearch"></my-search>
    </view>



.search-box{
  //设置定位效果为"吸顶"
  position: sticky;
  //吸顶的"位置"
  top: 0;
  //提高层级,防止被轮播图覆盖
  z-index: 999;
}

二.搜索页面功能及布局

1.修改搜索框的背景颜色

<view class="search-box">
        <uni-search-bar  @input="input" :radius="100"
        placeholder="请输入内容" cancel-button="none"></uni-search-bar>
    </view>

2.手机上自动获取焦点

3.防抖处理

 data() {
      return {
        timer: null,
        kw: ''
      };
    },
    methods:{
      //input输入事件的处理函数
      input(e){
        clearTimeout(this.timer)
        this.timer = setTimeout(()=>{
          // console.log(e);
          this.kw = e
        },500)
      }

3.渲染搜索建议列表

<!-- 搜索建议列表 -->
    <view class="sugg-list">
      <view class="sugg-item" v-for="(item,i) in searchResults" :key="i">
          <view class="goods-name">{{item.goods_name}}</view>
          <uni-icons type="arrowright" size="16"></uni-icons>
      </view>
    </view>
async getSearchList(){
        //判断搜索关键词是否为空
        if(this.kw.length === 0){
          this.searchResults = []
          return 
        }
        const{ data: res }  = await uni.$http.get('/api/public/v1/goods/qsearch',{ query: this.kw})
        if(res.meta.status !== 200) {
          return uni.$showMsg()
        }
        this.searchResults = res.message
      }

 1)CSS样式

.sugg-list{
  padding: 0 5px;
  .sugg-item{
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    padding: 13px 0;
    
    border-bottom: 1px solid #efefef;
    
    .goods-name{
      //文字不允许换行(单行文本)
      white-space: nowrap;
      //超出部分隐藏
      overflow: hidden;
      //超出部分用...替换
      text-overflow: ellipsis;
      
    }
  }
}

2)跳转商品详情页

<view class="sugg-item" v-for="(item,i) in searchResults" 
      :key="i"  @click="gotoDetail(item)">
 gotoDetail(item){
        uni.navigateTo({
          url: '/subpkg/goods_detail/goods_detail?goods_id='+item.goods_id
        })
      }

4.搜索历史

v-if="searchResults.length !== 0" 展示搜索建议

<!-- 搜索历史 -->
    <view class="history-box" v-else>
        <!-- 标题区域 -->
        <view class="history-title">
          <text>搜索</text>
          <uni-icons type="trash" size="17"></uni-icons>
        </view>
        <!-- 列表区域 -->
        <view class="history-list">
          <uni-tag :text="item" v-for="(item,i) in historyList" :key="i"></uni-tag>
        </view>
    </view>

.history-box{
  padding: 0 5px;
  .history-title{
    display: flex;
    justify-content: space-between;
    height: 40px;
    align-items: center;
    font-size: 13px;
    border-bottom: 1px solid #efefef;
  }
  .history-list{
    display: flex;
    flex-wrap: wrap;
    //uni-tag标签自带
    .uni-tag{
      margin-top: 5px;
      margin-right: 5px;
    }
  }
  
}

1)去除重复并按照最新输入顺序进行排序

methods:{
      //input输入事件的处理函数
      input(e){
        clearTimeout(this.timer)
        this.timer = setTimeout(()=>{
          // 顺序不能颠倒
        this.kw = e
         this.getSearchList()
        },500)
         
          // this.saveServhHistory()
      },
      async getSearchList(){
        //判断搜索关键词是否为空
        if(this.kw.length === 0){
          this.searchResults = []
          return 
        }
        const{ data: res }  = await uni.$http.get('/api/public/v1/goods/qsearch',{ query: this.kw})
        if(res.meta.status !== 200) {
          return uni.$showMsg()
        }
        this.searchResults = res.message
        this.saveSearchHistory()

      },
      gotoDetail(item){
        uni.navigateTo({
          url: '/subpkg/goods_detail/goods_detail?goods_id='+item.goods_id
        })
      },
      saveSearchHistory(){
        //保存输入内容
        // this.historyList.push(this.kw)
        const set = new Set(this.historyList)
        set.delete(this.kw)
        set.add(this.kw)
        console.log(set);
        
        this.historyList = Array.from(set)
        
      }
      
    },
    computed: {
      //计算属性
      histories(){
        return [...this.historyList].reverse()
      }
    }

2)持久化存储

 onLoad() {
      this.historyList =  JSON.parse(uni.getStorageSync('kw') || '[]')
    },

saveSearchHistory(){
        //保存输入内容
        // this.historyList.push(this.kw)
        const set = new Set(this.historyList)
        set.delete(this.kw)
        set.add(this.kw)
        console.log(set);
        
        this.historyList = Array.from(set)
        
        //对搜索历史数据，进行持久化的存储
        uni.setStorageSync('kw',JSON.stringify(this.historyList))
        
      }

3)清空历史数据



<view class="history-title">
          <text>搜索</text>
          <uni-icons type="trash" size="17" @click="clean"></uni-icons>
        </view>

clean(){
        this.historyList = []
        uni.setStorageSync('kw','[]')
      }

4)点击搜索历史跳转商品列表页

     <view class="history-list">
          <uni-tag :text="item" v-for="(item,i) in histories" :key="i"
          @click="gotoGoodsList(item)"
          ></uni-tag>
        </view>


  gotoGoodsList(kw){
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?query='+kw
        })
      }

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