NSPersistentCloudKitContainer抛出调试/错误消息

Question

概述

• 当我使用NSPersistentCloudKitContainer时，我会得到以下打印在Xcode调试区域上的错误/调试消息。
• 我已登录iCloud，并正在设备上进行测试。
• 同步似乎很好
• 我仍在使用开发(尚未部署到生产中)
• 通过使用通过启用CloudKit coredata同步生成的默认代码，我尝试了一个新项目，但仍然得到相同的消息。

打印在Xcode调试区域上的错误/调试消息

CoreData: debug: CoreData+CloudKit: -[PFCloudKitOptionsValidator validateOptions:andStoreOptions:error:](36): Validating options: <NSCloudKitMirroringDelegateOptions: 0x600000760510> containerIdentifier:<MyContainerID> databaseScope:Private ckAssetThresholdBytes:<null> operationMemoryThresholdBytes:<null> useEncryptedStorage:NO useDeviceToDeviceEncryption:NO automaticallyDownloadFileBackedFutures:NO automaticallyScheduleImportAndExportOperations:YES skipCloudKitSetup:NO preserveLegacyRecordMetadataBehavior:NO useDaemon:YES apsConnectionMachServiceName:<null> containerProvider:<PFCloudKitContainerProvider: 0x600003764210> storeMonitorProvider:<PFCloudKitStoreMonitorProvider: 0x600003764220> metricsClient:<PFCloudKitMetricsClient: 0x600003764230> metadataPurger:<PFCloudKitMetadataPurger: 0x600003764240> scheduler:<null> notificationListener:<null> containerOptions:<null> defaultOperationConfiguration:<null> progressProvider:<NSPersistentCloudKitContainer: 0x60000205d200> test_useLegacySavePolicy:YES archivingUtilities:<PFCloudKitArchivingUtilities: 0x600003764250> bypassSchedulerActivityForInitialImport:NO
storeOptions: {
    NSInferMappingModelAutomaticallyOption = 1;
    NSMigratePersistentStoresAutomaticallyOption = 1;
    NSPersistentCloudKitContainerOptionsKey = "<NSPersistentCloudKitContainerOptions: 0x600003b3a190>";
    NSPersistentHistoryTrackingKey = 1;
    NSPersistentStoreMirroringOptionsKey =     {
        NSPersistentStoreMirroringDelegateOptionKey = "<NSCloudKitMirroringDelegate: 0x600000c642a0>";
    };
    NSPersistentStoreRemoteChangeNotificationOptionKey = 1;
}
CoreData: debug: CoreData+CloudKit: -[NSCloudKitMirroringDelegate observeChangesForStore:inPersistentStoreCoordinator:](416): <NSCloudKitMirroringDelegate: 0x600000c642a0>: Observing store: <NSSQLCore: 0x14080aec0> (URL: file:///Users/<my home folder>/Library/Group%20Containers/group.<app name>/<filename>.sqlite)
CoreData: CloudKit: CoreData+CloudKit: -[NSCloudKitMirroringDelegate _setUpCloudKitIntegration](562): <NSCloudKitMirroringDelegate: 0x600000c642a0>: Successfully enqueued setup request.
CoreData: CloudKit: CoreData+CloudKit: -[NSCloudKitMirroringDelegate checkAndExecuteNextRequest](3209): <NSCloudKitMirroringDelegate: 0x600000c642a0>: Checking for pending requests.
CoreData: CloudKit: CoreData+CloudKit: -[NSCloudKitMirroringDelegate checkAndExecuteNextRequest]_block_invoke(3222): <NSCloudKitMirroringDelegate: 0x600000c642a0>: Executing: <NSCloudKitMirroringDelegateSetupRequest: 0x600001643f20> D3975DD0-1198-40F2-9D6A-B9994B9710B6
CoreData: debug: CoreData+CloudKit: -[PFCloudKitMetadataModelMigrator calculateMigrationStepsWithConnection:error:](446): Skipping migration for 'ANSCKDATABASEMETADATA' because it already has a column named 'ZLASTFETCHDATE'

问题：

1. 这些是我的错误吗？我错过了什么吗？
2. 或者这些可以被忽视吗？
3. 我应该向苹果公司提交反馈/错误信息吗？

Answer 1

我的应用程序使用CoreData & CloudKit有一段时间了。起初，我也担心所有的调试器日志，但现在我忽略了其中的大多数日志。这项工作如下：

在scheme/Run/Arguments/Arguments Passed On Launch中添加和检查

-com.apple.CoreData.CloudKitDebug 0  
-com.apple.CoreData.Logging.stderr 0  

对特定日志的一些评论：

CoreData: debug: CoreData+CloudKit: -[PFCloudKitOptionsValidator validateOptions:显然只是有关同步设置的信息。

如所报告的CoreData: CloudKit: CoreData+CloudKit: -[NSCloudKitMirroringDelegate _setUpCloudKitIntegration]:，同步设置已成功地排队，并将在以后处理。

CoreData: CloudKit: CoreData+CloudKit: -[NSCloudKitMirroringDelegate checkAndExecuteNextRequest]:只是关于同步进程的活动的信息。

CoreData: debug: CoreData+CloudKit: -[PFCloudKitMetadataModelMigrator calculateMigrationStepsWithConnection:似乎是CoreDate & CloudKit集成之前已经完成过的信息，并且不需要为某一列设置特定的设置。

很长一段时间以来，我忽略了所有这些日志，而且我的CoreData & CloudKit的工作时间最多，没有任何报告的错误。

编辑：

您可以检查是否存在“真正的”同步错误:我注册NSPersistentCloudKitContainer.Event通知(请参阅文档)，并将同步事件记录在

    var currentPersistentCloudKitContainerEvents: [NSPersistentCloudKitContainer.Event] = []
//…
        NotificationCenter.default.addObserver(forName: NSPersistentCloudKitContainer.eventChangedNotification, object: nil, queue: .main) { notification in
            guard let event = notification.userInfo?[NSPersistentCloudKitContainer.eventNotificationUserInfoKey] as? NSPersistentCloudKitContainer.Event else { return }
            let eventID = event.identifier
            let eventType = event.type
            var eventTypeString: String
            switch eventType {
                case .setup:  eventTypeString = "setup "
                case .import: eventTypeString = "import"
                case .export: eventTypeString = "export"
                @unknown default: eventTypeString = "unknown"
            }

            // Check if the event has already been recorded
            let alreadyRecordedEvent = self.currentPersistentCloudKitContainerEvents.first(where: { $0.identifier == eventID} )
            var index: Int
            if let recordedEvent = alreadyRecordedEvent {
                index = self.currentPersistentCloudKitContainerEvents.firstIndex(of: recordedEvent)!
                self.currentPersistentCloudKitContainerEvents[index] = event
            } else {
                index = self.currentPersistentCloudKitContainerEvents.count
                self.currentPersistentCloudKitContainerEvents.append(event)
                syncLog.log("Started:   \(eventTypeString, privacy: .public), ID: \(eventID, privacy: .public), now in progress: \(self.currentPersistentCloudKitContainerEvents.count, privacy: .public)")
            }
            let recordedEvent = self.currentPersistentCloudKitContainerEvents[index]
            
            if event.endDate != nil {
                // The event finished successfully or with error
                if recordedEvent.succeeded {
                    syncLog.log("Succeeded: \(eventTypeString, privacy: .public), ID: \(eventID, privacy: .public), now in progress: \(self.currentPersistentCloudKitContainerEvents.count - 1, privacy: .public)")
                } else {
                    syncLog.error("Did not succeed: \(eventTypeString, privacy: .public), ID: \(eventID, privacy: .public), now in progress: \(self.currentPersistentCloudKitContainerEvents.count - 1, privacy: .public)")
                    if let error = event.error {
                        self.handleError(error)
                    }
                }
                // Delete the terminated event
                self.currentPersistentCloudKitContainerEvents.remove(at: index)
                return
            }
            
        }  

同步错误是那些没有成功的事件。但这样的事件当然可以再试一次。

我偶尔会遇到一个“真实”的错误。

2022-11-21 08:01:51.456355+0100 ShopEasy![61491:2995577] [error] error: CoreData+CloudKit: -[NSCloudKitMirroringDelegate resetAfterError:andKeepContainer:]  

但CoreData & CloudKit似乎正在复苏。