项目是用wepy生成的，出现一个问题：input组件在工具上调试正常，但在手机上预览或者体验版时，将光标移到最前面，点击删除，e.detail.value变为了空，不知道什么情况。。。。

代码如下:

<template>

<view class="container">

<form bindsubmit="formSubmit" bindreset="formReset">

<view class="title">请输入孩子的账号和密码 </view>

<view class="section">

<input bindinput="countValChange" name="account" placeholder="请输入孩子的账号或绑定的手机号" />

</view>

<view class="section">

<input bindinput="psdValChange" name="password" placeholder="请输入密码" password="{{!showPsd}}" />

<view class="imgWrap" bindtap="showPsd">

<image wx:if="{{!showPsd}}" src="../static/password1.png" />

<image wx:if="{{showPsd}}" src="../static/password2.png" />

</view>

</view>

<view class="btn-area" wx-if="{{isSub}}">

<button formType="submit">关联账号</button>

</view>

<view class="btn-area notSub" wx-if="{{!isSub}}">

<button>关联账号</button>

</view>

</form>

</view>

</template>

<script>

import wepy from 'wepy'

import { connect } from 'wepy-redux'

import { SET_BIND_STATUS } from '../store/types/user'

@connect({

bindStatus (state) {

return state.user.bindStatus

}

}, {

setBindStatus: SET_BIND_STATUS

})

export default class ChildInput extends wepy.page {

config = {

navigationBarTitleText: '关联孩子账号'

}

components = {}

data = {

showPsd: false,

count: '',

psd: ''

}

methods = {

formSubmit (e) {

// 后台交互

console.log('form发生了submit事件，携带数据为：', e.detail.value)

this._bindAccount(e.detail.value.account, e.detail.value.password)

// 弹窗

// wepy.showToast({

//   title: '成功',

//   icon: 'none',

//   duration: 2000

// })

},

showPsd() {

this.showPsd = !this.showPsd

},

countValChange(e) {

this.count = e.detail.value

console.