<view class="btns" wx:for="{{phoneList}}" wx:key="id">

      <input bindinput="writeNumber" type="number" value="{{item.phone}}" class="btn1" maxlength="11" placeholder="请输入电话号码"  data-index="{{index}}"/>

      <image src="../Image/detele1.png" class="icon1" bindtap="icon" data-index="{{index}}"></image>

    </view>

//点击清空电话号码

   icon:function(e){

    var that = this;

    var index = e.currentTarget.dataset.index;

    var list = that.data.phoneList;

    list[index].phone = '';

    that.setData({

      phoneList: that.data.phoneList

    })

  },

<form bindreset="cleanInput">

     <input type="text" placeholder="输入新消息"  bindinput="bindMessage"></input>

     <button bindtap="sendMessage" formType="reset">发送 </button>

</form>

Page({

  data: {

    sendInfo: '',

    userMessage: ''

},

bindMessage: function(e) {

    this.setData({

      userMessage: e.detail.value

    })

 },

 cleanInput: function() {

    var setMessage = { sendInfo: this.data.userMessage }

    this.setData(setMessage)

}

})