tvOS中的CloudKit订阅

Question

我正尝试使用CloudKit和CKSubcription在几台Apple TV之间同步数据。问题是我添加，删除或更新记录时从不会调用application:didReceiveRemoteNotification:。我相信我正确配置订阅，并且我确认他们已添加到CloudKit仪表板。我曾多次尝试重置仪表板中的开发环境，但这并没有帮助。我真的不想创建一个定时器来经常抓取每一个。谢谢你的帮助！

此外，我正在使用CloudKit中的私有数据库，而不是公用数据库，如果这很重要。

这里是我的代码：

AppDelegate.swift

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool { 

    CloudKitManager.subscribeToItemUpdates() 
    application.registerForRemoteNotifications() 

    ... 

    return true 
} 

CloudKitManager.swift

class func subscribeToItemUpdates() { 

    if let uuid = UIDevice.currentDevice().identifierForVendor?.UUIDString { 

     saveSubscriptionWithIdentifier(uuid + "create", options: CKSubscriptionOptions.FiresOnRecordCreation) 
     saveSubscriptionWithIdentifier(uuid + "update", options: CKSubscriptionOptions.FiresOnRecordUpdate) 
     saveSubscriptionWithIdentifier(uuid + "delete", options: CKSubscriptionOptions.FiresOnRecordDeletion) 
    } 

} 

class func saveSubscriptionWithIdentifier(identifier: String, options: CKSubscriptionOptions) { 

    let sub = CKSubscription(recordType: "Message", predicate: NSPredicate(value: true), subscriptionID: identifier, options: options) 
    sub.notificationInfo = CKNotificationInfo() 

    let publicDatabase = CKContainer.defaultContainer().publicCloudDatabase 
     publicDatabase.saveSubscription(sub) { (savedSubscription, error) -> Void in 
     if error != nil { 
      print("Error saving CloudKit subscription \(error)") 
     } 
     else { 
      print("Saved subscription to CloudKit", savedSubscription) 
     } 
    } 
} 

Answer 1

有tvOS和iOS之间的微小差异。在我的演示应用程序我处理这样的：

#if os(tvOS) 
//This will only be called when your app is active. So this is what you should use on tvOS 
func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject]) { 
    EVLog("Push received") 
    EVCloudData.publicDB.didReceiveRemoteNotification(userInfo, executeIfNonQuery: { 
     EVLog("Not a CloudKit Query notification.") 
    }, completed: { 
     EVLog("All notifications are processed") 
    }) 
} 
#else 
// Process al notifications even if we are in the background. tvOS will not have this event 
// Make sure you enable background notifications in the app settings. (entitlements: pushnotifications and backgrounds modes - notifications plus background fetch) 
func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject], fetchCompletionHandler completionHandler: (UIBackgroundFetchResult) -> Void) { 
    EVLog("Push received") 
    EVCloudData.publicDB.didReceiveRemoteNotification(userInfo, executeIfNonQuery: { 
     EVLog("Not a CloudKit Query notification.") 
    }, completed: { 
     EVLog("All notifications are processed") 
     completionHandler(.NewData) 
    }) 
} 
#endif 

欲了解更多信息，请参阅EVCloudKitDao