废话不多说，直接上代码

<input placeholder='想对他说点什么' id='a' confirm-hold="true" maxlength="-1" cursor-spacing="12" confirm-type='send' focus='{{focus}}' value='{{value}}' bindinput='inputClick' ></input>

<input  value='发送' bindtap='faClick'></input>

//js

//获取输入内容

inputClick:function(e){

// console.log(e)

var that = this

var value = e.detail.value

this.setData({

value : value

})

},

//发送

faClick:function(){

var that = this

var value = that.data.value

console.log(value)

var obj = {}

obj.id = that.data.id

obj.himg = "../images/header_0" + that.data.id + ".png"

obj.con = value

var chatArr = that.data.chatArr

chatArr.push(obj)

var value = ""

var focus = true

that.setData({

chatArr: chatArr,

value:value,

focus: focus

})

that.bottom()

},

简单的说  就是发送也是一个input   点击发送的时候 触发了发送input 的软键盘 这时候让焦点回到 输入input

大佬如果有更好的办法   求分享