PROSAGA码农传奇-云数据库Trove-如何在CloudKit中删除CKRecord和所有引用记录

如何在CloudKit中删除CKRecord和所有引用记录

作者: 至此
发布时间: 2024-12-11 11:46:46 (22天前)
转自：

<div class =“post-text”itemprop =“text”>
  <BLOCKQUOTE>
    <P>
      解
    </p>
  </BLOCKQUOTE>
  <P>
    如果我们要删除子记录，我们必须添加引用
     <code>
      parent record
    </code>
     至
     <code>
      child record
    </code>
    。在上面的情况下，它应该看起来像这样：
  </p>
   <pre>
    <code>
          let privateDB = CKContainer.default().privateCloudDatabase

let parentRecord = CKRecord(recordType: "ParentRecord")
    parentRecord["name"] = "FOO" as CKRecordValue

let childRecord = CKRecord(recordType: "ChildRecord")
    childRecord["name"] = "BOO" as CKRecordValue

privateDB.save(parentRecord) { (record: CKRecord?, error: Error?) in
        if error == nil {
            if let responseRecord = record {
                let reference = CKReference(record: responseRecord, action: CKReferenceAction.deleteSelf)
                childRecord["referenceObject"] = reference as CKRecordValue
                privateDB.save(childRecord, completionHandler: { (record, error) in
                    // DO SOMETHIG
                })
            }
        }
    }

</code>
  </pre>
  <P>
    在这种情况下，删除
     <code>
      parent record
    </code>
     make，儿童记录将被自动删除
  </p>
</DIV>