微信小程序结合Storage实现搜索历史效果

版权声明：本文为博主原创文章，转载请注明出处。 https://blog.csdn.net/Ruffaim/article/details/82712595

实现目标

---

代码实现

集合wx.setStorageSync()和wx.getStorageSync()这两个同步函数来实现这个功能实际上非常简单。

<!-- wxml -->
<view class="search-box">
  <view class='icon'>
    <image src='../../assets/search.png' mode='widthFix'></image>
    <!-- 使用bindinput属性绑定getSearchKey函数获取input组件中的值-->
    <!-- 使用bindblur属性绑定routeToSearchResPage函数处理input失去焦点事件-->
    <input placeholder='搜索你想购买的商品' bindinput='getSearchKey' bindblur='routeToSearchResPage'></input>
  </view>
  <text>取消</text>
</view>
<view class='options'>
  <text>历史搜索记录</text>
  <text bindtap='clearHistory'>清空</text>
</view>
<view class='options'>
<!-- 遍历 history 数组 -->
  <text class='item' wx:for='{{history}}' data-index='{{index}}' bindtap='routeToSearchResPage'>{{item}}</text>
</view>

样式表 可无视

/* wxss */
.search-box {
  background-color: #142341;
  overflow: hidden;
  padding: 3%;
}

.search-box .icon {
  width: 80%;
  padding-left: 2%;
  background-color: #fff;
  float: left;
  border-radius: 1rem;
}

.search-box .icon image {
  width: 1rem;
  height: 1rem;
  display: block;
  margin: 0.5rem 0;
  float: left;
}

.search-box input {
  display: block;
  font-size: 0.8rem;
  height: 2rem;
  line-height: 2rem;
  float: left;
  margin-left: 5%;
}

.search-box text {
  width: 18%;
  float: left;
  color: #fff;
  line-height: 2rem;
  text-align: center;
  font-size: 0.8rem;
}

.options {
  width: 94%;
  margin: 3%;
  font-size: 0.8rem;
  color: #999;
}

.options text:last-child {
  color: #1268bb;
  float: right;
}

.options .item {
  padding: 0.2rem 0.5rem;
  background-color: #eee;
  float: left !important;
  color: #565656 !important;
  border-radius: 0.1rem;
  margin: 3%;
}

JavaScript

//index.js
Page({
  data: {
    searchKey: "",
    history: []
  },
  //获取input文本
  getSearchKey: function(e) {
    this.setData({
      searchKey: e.detail.value
    })
  },
  // 清空page对象data的history数组 重置缓存为[]
  clearHistory: function() {
    this.setData({
      history: []
    })
    wx.setStorageSync("history", [])
  },
  // input失去焦点函数
  routeToSearchResPage: function(e) {
    //对历史记录的点击事件 已忽略
    let _this = this;
    let _searchKey = this.data.searchKey;
    if (!this.data.searchKey) {
      return
    }

    let history = wx.getStorageSync("history") || [];
    history.push(this.data.searchKey)
    wx.setStorageSync("history", history);
  },
  //每次显示钩子函数都去读一次本地storage
  onShow: function() {
    this.setData({
      history: wx.getStorageSync("history") || []
    })
  }
})

---

本地存储可在微信开发者工具调试的Storage可见。