一、应用小程序云函数，进行图片检测处理

https://developers.weixin.qq.com/miniprogram/dev/api-backend/open-api/sec-check/security.mediaCheckAsync.html

1）问题：图片大小限制1M ，图片尺寸不超过 750px x 1334px ;

2）解决：上传云存储，然后使用云函数进行检测

二、相册或是拍照后的图片，1）上传到云存储后  2）cloud替换成https开头的url 3) 云开发CloudBase图像处理扩展
https://cloud.tencent.com/document/product/876/42103 
4) 再进行图片安全检测

 wx.chooseMedia({
      count: 1,
      mediaType: ['image'],
      sourceType: ['album', 'camera'],
      sizeType: ['compressed'],
      success: res => {
          const tempFilePaths = res.tempFiles[0].tempFilePath
          const cloudPath = `act/original-${Math.floor(Math.random() * 1000000000)}.jpg`
          wx.cloud.uploadFile({
            cloudPath,
            filePath: tempFilePaths
          }).then(res => {
            console.log('原临时路径换原图云存储路径', res)
          const pictureOrignial = res.fileID
          wx.cloud.getTempFileURL({ // cloud替换成https开头的url
            fileList: [pictureOrignial],
            success: res => {
              console.log(res)
              const url = res.fileList[0].tempFileURL
              this.setData({
                src: `${url}?imageMogr2/thumbnail/258x258`
              }, () => {
                wx.getImageInfo({
                  src: this.data.src,
                  success: res => {
                    console.log('检测的图片信息', res, res.width, res.height)
                    wx.getFileInfo({
                      filePath: res.path,
                      success: res1 => {
                        console.log('检测的图片的大小', res1.size)
                        handleImg.checkImg(res.path).then(res => { // 图片检测封装成工具函数，多处需要调用
                          console.log(res)
                          // if (res === 'ok') {
                          //   wx.hideLoading()
                          //   getApp().globalData.imgSrc = tempFilePaths
                          // } else {
                          //   wx.hideLoading()
                          //   utils.showTip()
                          //   utils.backNoReloadPage()
                          // }
                        })
                      }
                    })
                  }
                })
              })
            }
          })
        }).catch(err => {
          console.log(err)
          wx.hideLoading()
        })
      }
    })