作者：JoyJin，来自授权地址 
wxml:

1. <view class="btns" wx:for="{{phoneList}}" wx:key="id">
2. <input bindinput="writeNumber" type="number" value="{{item.phone}}" class="btn1" maxlength="11" placeholder="请输入电话号码" data-index="{{index}}"/>
3. <image src="../Image/detele1.png" class="icon1" bindtap="icon" data-index="{{index}}"></image>
4. </view>

js:

1. //点击清空电话号码
2. icon:function(e){
3. var that = this;
4. var index = e.currentTarget.dataset.index;
5. var list = that.data.phoneList;
6. list[index].phone = '';
7. that.setData({
8. phoneList: that.data.phoneList
9. })
10. },

点击发送清空input值：

1. <form bindreset="cleanInput">
2. <input type="text" placeholder="输入新消息" bindinput="bindMessage"></input>
3. <button bindtap="sendMessage" formType="reset">发送 </button>
4. </form>

1. Page({
2. data: {
3. sendInfo: '',
4. userMessage: ''
5. },
6. bindMessage: function(e) {
7. this.setData({
8. userMessage: e.detail.value
9. })
10. },
11. cleanInput: function() {
12. var setMessage = { sendInfo: this.data.userMessage }
13. this.setData(setMessage)
14. }
15. })