小程序图片上传，长按删除,weui

<view class="weui-cells">

  <view class="weui-cell">

    <view class="weui-cell__bd">

      <view class="weui-uploader">

        <view class="weui-uploader__hd">

          <view class="weui-uploader__title">图片上传</view>

          <view class="weui-uploader__info">{{files.length}} / </view>

        </view>

        <view class="weui-uploader__bd">

          <view class="weui-uploader__files" id="uploaderFiles">

            <block wx:for="{{files}}" wx:key="*this">

              <view class="weui-uploader__file" bindtap="previewImage" bindlongpress="deleteImage" id="{{item}}" data-index="{{index}}">

                <image class="weui-uploader__img" src="{{item}}" mode="aspectFill"/>

              </view>

            </block>

          </view>

          <view wx:if="{{files.length < 9}}" class="weui-uploader__input-box" >

            <view class="weui-uploader__input" bindtap="chooseImage"></view>

          </view>

        </view>

      </view>

    </view>

  </view>

</view>

Page({

  data: {

    files: []

  },

  chooseImage: function(e) {

    var that = this;    var images = that.data.files;

    wx.chooseImage({

      count:  - images.length,

      sizeType: ['original', 'compressed'],

      sourceType: ['album', 'camera'],

      success: function(res) {

        // 返回选定照片的本地文件路径列表，tempFilePath可以作为img标签的src属性显示图片

        that.setData({

          files: that.data.files.concat(res.tempFilePaths)

        });

      }

    })

  },

  previewImage: function(e) {

    wx.previewImage({

      current: e.currentTarget.id,

      urls: this.data.files

    })

  },

  deleteImage: function(e) {

    var that = this;    var images = that.data.files;    var index = e.currentTarget.dataset.index; //获取当前长按图片下标

    wx.showModal({

      title: '系统提醒',

      content: '确定要删除此图片吗？',

      success: function(res) {

        if (res.confirm) {

          images.splice(index, );

        } else if (res.cancel) {

            return false;

        }

        that.setData(

          files: images

        });

      }

    })

  }

})