Question

我想删除父记录CKRecord以及此记录的所有子项。创建父记录和子记录的方法如下：

func save() {
    //Creating parent record

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

    //Creating child record

    let childRecord = CKRecord(recordType: "ChildRecord")
    childRecord["name"] = "FOO" as CKRecordValue
    let reference = CKReference(record: childRecord, action: CKReferenceAction.deleteSelf)

    //ADDING Reference to parent record

    parentRecord["referenceObject"] = reference as CKRecordValue

    let operation = CKModifyRecordsOperation(recordsToSave: [parentRecord, childRecord], recordIDsToDelete: nil)
    //([CKRecord]?, [CKRecordID]?, Error?) -> Void)
    operation.modifyRecordsCompletionBlock = { records, recordIDs, error in
        if error != nil {
            print(error.debugDescription)
        }
    }
    operation.queuePriority = .high
    operation.qualityOfService = .background
    let operationQueue = OperationQueue()
    operationQueue.addOperations([operation], waitUntilFinished: false)
}

现在我想只通过代码删除父记录。由于CKReferenceAction.deleteSelf，应自动删除子记录。功能＆＃34;删除＆＃34;看起来像这样：

func delete(recordName: String) {
    let privateDB = CKContainer.default().privateCloudDatabase
    let recordID = CKRecordID(recordName: recordName)
    privateDB.delete(withRecordID: recordID) { (id, error) in
        if error != nil {
            print(error.debugDescription)
        }
    }
}

当我使用此delete方法时，我的父记录正在从CloudKit数据库中删除，但子记录仍然存在且我不知道原因。有什么建议吗？

Answer 1

解

如果我们要删除子记录，我们必须将//clean up animation first this.setState({stopAnimation: true}, () => { this.props.navigation.goBack() })的引用添加到parent record。在上面的情况下，它应该是这样的：

child record

在这种情况下，删除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 }) } } }会自动删除子记录

如何在CloudKit中删除CKRecord和所有引用记录

1 个答案: