```

<view class=“letters” bindtouchstart=“startLetter” bindtouchmove=“selectLetter” bindtouchend=“endLetter”>

  <view wx:for="{{letters}}" class=“letter” data-letter="{{item}}">

    {{item}}

  </view>

</view>

```

```javascprit

Page({

 data: {

   letters: [‘A’, ‘B’, ‘C’, ‘D’, ‘E’, ‘F’, ‘G’, ‘H’, ‘I’, ‘J’, ‘K’, ‘L’, ‘M’, ‘N’, ‘O’, ‘P’, ‘Q’, ‘R’, ‘S’, ‘T’, ‘U’, ‘V’, ‘W’, ‘X’, ‘Y’, ‘Z’]

 },

 //事件处理函数

 bindViewTap: function() {

   wx.navigateTo({

     url: ‘…/logs/logs’

   })

 },

 onLoad: function () {

   console.log(this.data.letters);

 },

 onShow() {

 },

 selectLetter(e) {

   console.log(e.target.dataset.letter);

 },

 startLetter(e) {

   console.log(e.target.dataset.letter, ‘start’);

 },

 endLetter(e) {

   console.log(e.target.dataset.letter, ‘end’);

 }

})

```

在手机上触摸滑动执行了selectLetter函数，e打印出来的数据一直都是startLetter的数据。

IDE上正常，但是也是概率性出现数据不改变，一直是touchstart的数据