<view class="gallery">

    <view class="item" wx:for="{{images}}" wx:key="">

        <image src="{{item}}" data-src="{{item}}" bindtap="previewImage" mode="aspectFill" />



        <!-- 删除按钮 -->

        <view class="delete" bindtap="delete" data-index="{{index}}">X</view>

    </view>

    <view class="item" bindtap="chooseImage">

        <view class='addIcon'>+</view>

    </view>

</view>

<button type="primary" bindtap="submit">提交</button>

————————————————

/* pages/index/index.wxss */
/*画廊*/
.gallery {    
  width:630rpx;
  margin: 0 auto;
  display: flex;    
  justify-content: flex-start;    
  flex-wrap: wrap;
}
/*每张图片所占容器*/
.item {    
  position: relative;    
  margin:10rpx 5rpx;
  width: 200rpx;
  height: 200rpx;
}
.item image{
  width: 100%;
  height: 100%;
}
/*add按钮*/
.item .addIcon{
  position:relative;
  width:200rpx;
  height:200rpx;
  text-align:center;
  line-height:200rpx;
  font-size:80rpx;
  background: #f2f2f2;
  color: #555;
}
/*删除按钮*/
.delete {    
  position:absolute;
  right:0;
  top:0;
  /* background:#ccc; */
  opacity:1;
  height: 36rpx;
  font-size:22rpx;
  font-weight:700;
  padding:0 8rpx 0 10rpx;
}
————————————————


var that;
Page({
  data: {
    images: [],
    uploadedImages: [],
    //imageWidth: getApp().screenWidth / 4 - 10
  },
  onLoad: function (options) {
    that = this; var objectId = options.objectId; console.log(objectId);
  },
  chooseImage: function () {
    // 选择图片
    wx.chooseImage({
      count: 3, // 默认9
      sizeType: ['compressed'],
      sourceType: ['album', 'camera'],
      // 可以指定来源是相册还是相机，默认二者都有
      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
        var tempFilePaths = res.tempFilePaths;
        console.log(tempFilePaths);
        that.setData({
          images: that.data.images.concat(tempFilePaths)
        });
      }
    })
  },
  // 图片预览
  previewImage: function (e) {
    //console.log(this.data.images);
    var current = e.target.dataset.src
    wx.previewImage({
      current: current,
      urls: this.data.images
    })
  },
  // submit: function () {        
  //   // 提交图片，事先遍历图集数组
  //   that.data.images.forEach(function (tempFilePath) {
  //     new AV.File('file-name', {
  //       blob: {
  //         uri: tempFilePath,
  //       },
  //     }).save().then(                
  //       // file => console.log(file.url())
  //     function (file) {                    
  //       // 先读取
  //       var uploadedImages = that.data.uploadedImages;
  //       uploadedImages.push(file.url());                    
  //       // 再写入
  //       that.setData({
  //         uploadedImages: uploadedImages
  //       }); console.log(uploadedImages);
  //     }
  //     ).catch(console.error);
  //   });
  //   wx.showToast({
  //     title: '评价成功', success: function () {
  //       wx.navigateBack();
  //     }
  //   });
  // }, 
  delete: function (e) {
    var index = e.currentTarget.dataset.index; var images = that.data.images;
    images.splice(index, 1);
    that.setData({
      images: images
    });
  }
})
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