使用CloudKit保存尝试对成员'save（_：completionHandler :)'的模糊引用

Question

[我试图在更新参考列表并在此代码块的第一行得到错误之后，将其保存回CloudKit。

错误：对成员'save（_：completionHandler :)的引用不明确]

CKContainer.default().publicCloudDatabase.save(establishment) { [unowned self] record, error in
  DispatchQueue.main.async {
    if let error = error {
      print("error handling to come")
    } else {
      print("success")
    }
  }
}

这位于用户要遵循给定位置（机构）的功能内。我们将获取现有的场所及其关注者记录，检查是否有选定的用户在其中，如果不存在则将其添加到列表中（如果关注者列表为null则创建它）。

Edit, in case helpful
//Both of these are passed in from the prior view controller
  var establishment: Establishment?
  var loggedInUserID: String?

@objc func addTapped() {
    // in here, we want to take the logged in user's ID and append it to the list of people that want to follow this establishment
    // which is a CK Record Reference
    let userID = CKRecord.ID(recordName: loggedInUserID!)
    var establishmentTemp: Establishment? = establishment
    var followers: [CKRecord.Reference]? = establishmentTemp?.followers

    let reference = CKRecord.Reference(recordID: userID, action: CKRecord_Reference_Action.none)
    if followers != nil {
      if !followers!.contains(reference) {
        establishmentTemp?.followers?.append(reference)
      }
    } else {
      followers = [reference]
      establishmentTemp?.followers = followers
      establishment = establishmentTemp
    }

[这是粘贴在问题顶部的CKContainer.default ..... save块的出现位置]

我已经浏览了有关“模棱两可的参考文献”的各种文章，但无法找出问题的根源。试图明确设置establisthmentTemp和关注者的类型，以防出现问题（基于其他相关职位的解决方案），但没有运气。害怕我是一个相对缺乏经验的新手的想法！

感谢帮助。

Answer 1

记录我想出的解决方案：

两个问题的组合：

1. 我试图保存CK记录的更新版本而不是更新
2. 我没有将CK记录传递给save（）调用-而是自定义对象

（（我认为第二点是“含糊提及成员”的原因错误）

我通过以下方式替换了保存尝试（问题中的第一段代码）：

//first get the record ID for the current establishment that is to be updated
let establishmentRecordID = establishment?.id
//then fetch the item from CK

CKContainer.default().publicCloudDatabase.fetch(withRecordID: establishmentRecordID!) { updatedRecord, error in
  if let error = error {
    print("error handling to come")
  } else {

//then update the 'people' array with the revised one
    updatedRecord!.setObject(followers as __CKRecordObjCValue?, forKey: "people")
    //then save it    
    CKContainer.default().publicCloudDatabase.save(updatedRecord!) { savedRecord, error in
    }
  }
}