通过CKSubscription观察CKRecord删除不起作用

Question

CKSubscriptiondoc说:当记录修改导致订阅触发时,服务器会向具有该订阅的所有设备发送推送通知,但对原始更改记录的设备除外.

让我们假设我有两个设备:device 1并device 2从不同的iCloud帐户登录.假设两个设备都订阅了某个记录类型的记录删除.

1. 如果 device 1创建一个记录,然后device 1删除它然后device 2得到通知 - 这是按照DOC,但..
2. 如果device 1创建一个记录然后device 2删除它然后device 2得到通知 - 我认为它不符合DOC,并且它不做任何感觉,device 2删除它所以device 1应该通知

---

在设备1和设备2上设置订阅

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

    application.registerUserNotificationSettings(UIUserNotificationSettings(forTypes: .Alert, categories: nil))
    application.registerForRemoteNotifications()

    let defaultContainer = CKContainer.defaultContainer()
    let publicDatabase = defaultContainer.publicCloudDatabase

    publicDatabase.fetchAllSubscriptionsWithCompletionHandler({subscriptions, error in

        if error == nil {

            if subscriptions.count == 0 {

                let subscription = CKSubscription(recordType: "OU", predicate: NSPredicate(value: true), options: .FiresOnRecordDeletion)
                subscription.notificationInfo = CKNotificationInfo()
                subscription.notificationInfo.shouldBadge = false
                subscription.notificationInfo.alertBody = "OU removed or upated"
                publicDatabase.saveSubscription(subscription, completionHandler: {subscription, error in
                    if error == nil {
                    } else {
                        println("\(error.localizedDescription)")
                    }
                })
            }

        } else {
            println("\(error.localizedDescription)")
        }
    })


    return true
}

---

在设备1上创建记录

@IBAction func addOU(sender: AnyObject) {

    var defaultContainer = CKContainer.defaultContainer()
    var publicDatabase = defaultContainer.publicCloudDatabase

    let r = CKRecord(recordType: "OU", recordID: CKRecordID(recordName: "aaaa"))
    publicDatabase.saveRecord(r, completionHandler: { r2, error in

        if error == nil {
        } else {
            println("\(error.localizedDescription)")
        }
    })
}

---

删除设备2上的记录

@IBAction func removeOU(sender: AnyObject) {

    var defaultContainer = CKContainer.defaultContainer()
    var publicDatabase = defaultContainer.publicCloudDatabase

    publicDatabase.deleteRecordWithID(CKRecordID(recordName: "aaaa"), completionHandler: {recordID, error in

        if error == nil {

        } else {
            println("\(error.localizedDescription)")
        }
    })
}

Answer 1

我仍然认为,这是毫无意义的是如何CKSubscription工作的,但作为一个临时的解决办法,我建议首先改变CKRecord的lastModifiedUserRecordID谁想要删除记录的用户,以及事后才删除记录.

要改变lastModifiedUserRecordID你必须获取它而不做任何事情就把它保存回去,然后删除就可以了:

@IBAction func removeOU(sender: AnyObject) {

    var defaultContainer = CKContainer.defaultContainer()
    var publicDatabase = defaultContainer.publicCloudDatabase

    publicDatabase.fetchRecordWithID(CKRecordID(recordName: "aaaa"), completionHandler: {record, error in

        if error == nil {

            publicDatabase.saveRecord(record, completionHandler: {record2, error in

                if error == nil {

                    publicDatabase.deleteRecordWithID(CKRecordID(recordName: "aaaa"), completionHandler: {recordID, error in

                        if error == nil {

                        } else {
                            println("\(error.localizedDescription)")
                        }
                    })
                } else {
                    println("\(error.localizedDescription)")
                }
            })

        } else {
            println("\(error.localizedDescription)")
        }
    })
}