wxml文件如下：

<view>
  <input class="textinput" bindinput="bindinput" value="{
  {inputValue}}" placeholder="请输入内容" />
</view>

<scroll-view scroll-y="true" class="scrollview" hidden="{
  {hideScroll}}" style="{
  {arrayHeight>340?'height:340rpx':''}}">
  <view wx:for="{
  {bindSource}}">
    <view id="{
  {item}}" bindtap="itemtap" class="itemview">{
  {item}}</view>
  </view>
</scroll-view>

js文件如下：

//首先声明变量
//小程序input联想输入专用变量
var wayIndex = -1;
var school_area = '';
var grade = '';
// 结合上面wxml的<scroll-view>
var arrayHeight = 0;
// 当联想词数量较多，使列表高度超过340rpx࿰