<view class="weui-grids">
    <block wx:for="{{files}}" wx:key="*this">
      <view class="weui-grid">
        <image class="weui-grid__icon" src="{{item}}" mode="aspectFill" />
        <image class="delpic" src="/images/del.png" data-num="{{index}}" bindtap="delpic"></image>
      </view>
    </block>
  </view>
data: {
    count: 9,
    images: [],
    images_url: [],
    
    files: [],
    
  },
//上传图片
 
 chooseImg: function (e) {
    var that = this;
    if (that.data.count > 0) {
      wx.chooseImage({
        count: that.data.count,
        sizeType: ['compressed'], // 可以指定是原图还是压缩图，默认二者都有
        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 files = that.data.files.concat(res.tempFilePaths)
          that.setData({
            files: that.data.files.concat(res.tempFilePaths),
            images: [],
            images_url: []
          });
          that.uploadImage(files, 0)
          wx.showToast({
            title: '正在上传...',
            icon: 'loading',
            mask: true,
            duration: 10000
          })
        }
      })
    } else {
      wx.showToast({
        title: '最多上传9张图片',
        icon: 'none',
        mask: true,
        duration: 2000
      })
    }
    
  },
uploadImage: function (files, i) {
    var i
    var that = this
    wx.uploadFile({
      url: app.globalData.apiUrl + 'upload',
      filePath: files[i],
      name: 'img',
      success(res) {
        var images_url = that.data.images_url
        var images = that.data.images
        var picdata = JSON.parse(res.data);
        images_url.push(picdata.data.img_url);
        images.push(picdata.data.img);
        var count = images_url.length;
        that.setData({
          count: 9 - count,
          images: images,
          images_url: images_url
        });
        i++
        if (i < files.length) {
          that.uploadImage(files, i)
        } else {
          wx.hideToast();
        }
      },
      fail: function (res) {
        wx.hideToast();
        wx.showModal({
          title: '错误提示',
          content: '上传图片失败',
          showCancel: false,
          success: function (res) {}
        })
      }
    })
  },

异步处理，肯定不会按照顺序（欢迎私信交流），多图上传参考例子：https://blog.songdonghong.com/2020/03/18/wxxcxplsc/

写个代码片段 把这几张图放进去看下。