真机调试报这个错误，提示max size，我上传的图片很小的。Android手机没问题，现在发现iPhone6有问题。

APPID:wxa0c17091265340da

Error: errCode: -1  | errMsg: cloud.callFunction:fail Error: data exceed max size (callId: 1586489164793-0.5581622445325081) 
(trace: 11:26:4 start->11:26:11 system error (Error: data exceed max size), retry->11:26:17 
system error (Error: data exceed max size), retry->11:26:21 system error (Error: data exceed max size), abort); 
at cloud.callFunction api; 
    at new u (eval at n.call.document (runtime.js?devtools_ignore=true:1), :2:233907)
    at d (eval at n.call.document (runtime.js?devtools_ignore=true:1), :2:234414)
    at f (eval at n.call.document (runtime.js?devtools_ignore=true:1), :2:234509)
    at eval (eval at n.call.document (runtime.js?devtools_ignore=true:1), :2:399226)
    at t (eval at n.call.document (runtime.js?devtools_ignore=true:1), :2:65617)
    at eval (eval at n.call.document (runtime.js?devtools_ignore=true:1), :2:65739)
    at e (eval at n.call.document (runtime.js?devtools_ignore=true:1), :2:68192)
    at e.exports (eval at n.call.document (runtime.js?devtools_ignore=true:1), :2:27005)
    at y. (eval at n.call.document (runtime.js?devtools_ignore=true:1), :2:32408)
    at Number.r (eval at n.call.document (runtime.js?devtools_ignore=true:1), :2:32107)

刚才有开始报404012错误了

云函数的写法，请求的写法

const cloud = require('wx-server-sdk')
cloud.init()
// 云函数入口函数
exports.main = async(event, context) => {
  const {
    value
  } = event;
  try {
    const res = await cloud.openapi.security.imgSecCheck({
      media: {
        header: {
          'Content-Type': 'application/octet-stream'
        },
        contentType: 'image/png',
        value: Buffer.from(value)
      }
    })
    return res;
  } catch (err) {
    return err;
  }
}

请求

//检查图片
  imgcheck: function () {
    var that = this;
    wx.compressImage({
      src: this.data.imgbg, // 图片路径
      quality: 10, // 压缩质量
      success(res) {
        console.log('图片' + res.tempFilePath)
        wx.getFileInfo({
          filePath: res.tempFilePath,
          success(resinfo) {
            console.log('图片压缩后的尺寸' + resinfo.size)
            if (resinfo.size < 600 * 1024) {
              wx.getFileSystemManager().readFile({
                filePath: res.tempFilePath,
                success: buffer => {
                  console.log('getImageInfo' + JSON.stringify(buffer))
                  console.log('getImageInfo' + buffer)
                  console.log('getImageInfo' + buffer.data)


                  wx.cloud.callFunction({
                    name: 'imgcheck',
                    data: {
                      value: buffer.data
                    },
                    success: res => {
                      console.log('图片检测成功')
                      console.log(JSON.stringify(res))
                      console.log(res.result.errCode)
                      if (res.result.errCode == '87014') {
                        wx.hideLoading()
                        wx.showModal({
                          title: '提醒',
                          content: '此图片暂不可用',
                          showCancel: false
                        })
                      }
                      else {
                        that.updateimg();
                        console.log('图片正常')
                      }
                    },
                    fail: err => {
                      console.log(err)
                    },
                    complete: () => {


                    }
                  })


                },
                fail: err => {
                  console.log(err)
                }
              })
            } else {
              wx.hideLoading()
              wx.showModal({
                content: '图片过大，请选小点的(๑❛ᴗ❛๑)',
                showCancel: false
              })
            }
          }
        })
      },
    })
  },