Page({
    /**
     * 页面的初始数据
     */
    data: {
      inputValue: ''
    },
     //获取用户输入的搜索词
     getSearch(e) {
        console.log(e.detail.value) 
      },
      bindKeyInput: function (e) {
        this.setData({
          inputValue: e.detail.value
        })
      },
})

<view class="searchRoot">
<input class="searchInput"
bindinput="getSearch"
placeholder="搜索菜品"></input>
<image class="searchImg" bindtap="goSearch" src="/image/sousuo.png"></image>
</view>



<view class="page-section">
    <view class="weui-cells__title">实时获取输入值：{{inputValue}}</view>
    <view class="weui-cells weui-cells_after-title">
      <view class="weui-cell weui-cell_input">
        <input class="weui-input"  maxlength="10" bindinput="bindKeyInput" placeholder="输入同步到view中"/>
      </view>
    </view>
</view>