CloudKit：删除 CKSubscription 不起作用

Posted 2023-03-08

【中文标题】CloudKit：删除 CKSubscription 不起作用

【英文标题】：CloudKit: delete CKSubscription is not working

【发布时间】：2016-03-15 17:03:46

【问题描述】：

您好，我尝试取消对 CloudKit 的订阅。 到目前为止，我尝试了 CKModifySubscriptionsOperation 和 publicDB?.deleteSubscriptionWithID 的单一删除。我的 completionHandler 没有给我任何错误，并且有一个已删除订阅 ID 的数组。所以一切似乎都很好。

但是当我更改记录时，我仍然会收到推送通知。 如何删除订阅？

这是修改后的代码：

func cancelCubscription(subscription:Subscriptions)
    self._animationDelegate?.beginAnimation()
    var subs = [String]()
    subs.append(subscription.daySubSignature!)
    subs.append(subscription.hdpSubSignature!)
    subs.append(subscription.noteSubSignature!)
    subs.append(subscription.planerSubSignature!)
    subs.append(subscription.subjectSubSugnature!)
    subs.append(subscription.teacherSubSignature!)
    subs.append(subscription.tldSubSignature!)

    // Create a CKModifyRecordsOperation operation
    let subscriptionOperation = CKModifySubscriptionsOperation(subscriptionsToSave: nil, subscriptionIDsToDelete: subs)

    subscriptionOperation.modifySubscriptionsCompletionBlock =  (modifiedSubscriptions: [CKSubscription]?, deletedSubscriptionIDs: [String]?, error: NSError?) -> Void in
        guard error==nil else 
            dispatch_async(dispatch_get_main_queue(),  () -> Void in
                self._animationDelegate?.endAnimation()
                print(error!.localizedDescription)

                let title:String = "Alert_Cancel_CloudKit_Subscription_Error_Title".localized
                let message:String = error!.localizedDescription

                self._alertDelegate?.showAlert(title, message: message)
            )
            return
        

        dispatch_async(dispatch_get_main_queue(),  () -> Void in
            self._animationDelegate?.endAnimation()
            print("")
            print("- * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - *")
            print("Unscribe to CloudKit subscription success!")

            let title:String = "Alert_Cancel_CloudKit_Subscription_Success_Title".localized
            let message:String = "Alert_Cancel_CloudKit_Subscription_Success_Message".localized

            self._alertDelegate?.showAlert(title, message: message)

            for sub in deletedSubscriptionIDs!
                print("Deleted Subscription: \(sub)")
            

            subscription.tldSubSignature = "null"
            subscription.daySubSignature = "null"
            subscription.hdpSubSignature = "null"
            subscription.noteSubSignature = "null"
            subscription.planerSubSignature = "null"
            subscription.subjectSubSugnature = "null"
            subscription.teacherSubSignature = "null"
            subscription.subscribed = false
            Subscriptions.editSubsripction(subscription, context: self.appDel.managedObjectContext)
        )
    

    // Add the operation to an operation queue to execute it
    self._publicDB!.addOperation(subscriptionOperation)

我的订阅仍然有效： CloudKit Dashboard

我订阅时的日志：

- * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - *
CloudKit subscription success
teacherSubSignature = DE49AAFB-373C-49E5-8DC8-E81A977E7628
subjectSubSugnature = 3F06E054-D1B9-441E-AED3-CA947820D90C
daySubSignature = 8FF9AC02-F177-4381-AA8D-08AFFDB0A578
hdpSubSignature = 811ABA9A-D31B-4661-B783-B5DF033FC5F4
tldSubSignature = 1C07C661-02A9-48F3-9B92-08F41433E179
planerSubSignature = 1C32F1F0-3647-4F57-BDEF-215A28F69039
hdpSubSignature = 59216B52-1A21-4666-950A-F8CDE44591D2
Subscription Edited in Core Data

在删除订阅时： 错误=无

- * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - *
Unscribe to CloudKit subscription success!

Deleted Subscription: 8FF9AC02-F177-4381-AA8D-08AFFDB0A578
Deleted Subscription: 59216B52-1A21-4666-950A-F8CDE44591D2
Deleted Subscription: 811ABA9A-D31B-4661-B783-B5DF033FC5F4
Deleted Subscription: 1C32F1F0-3647-4F57-BDEF-215A28F69039
Deleted Subscription: 3F06E054-D1B9-441E-AED3-CA947820D90C
Deleted Subscription: DE49AAFB-373C-49E5-8DC8-E81A977E7628
Deleted Subscription: 1C07C661-02A9-48F3-9B92-08F41433E179
Subscription Edited in Core Data

【问题讨论】：

您是如何删除订阅的？你检查过你有多少订阅（重复）？

我没有重复我的 CloudKit 仪表板仅显示正确的类型和数量。但仍然在删除操作之后。

您是否检查以确保没有待处理的通知？你确定了吗，看答案。

【参考方案1】：

好的，这不是最终答案，但需要写一些代码，而且 cmets 太短了。这是什么意思呢;第一种方法获取任何未完成的通知，第二种方法确保您与他们关注的页面相同。

在理想情况下删除订阅之前，您需要确保获得类似位置的信息。

免责声明这是演示代码；而且我还没有对它进行广泛的测试。但它应该可以工作。

func fetchSubsInPlace() 
    let container = CKContainer(identifier: "iCloud.ch")
    let publicDB = container.publicCloudDatabase

    publicDB.fetchAllSubscriptionsWithCompletionHandler(subscriptions, error in
        for subscriptionObject in subscriptions! 
            let subscription: CKSubscription = subscriptionObject as CKSubscription
            print("subscription \(subscription)")
        
    )


func fetchNotificationChanges() 
    let operation = CKFetchNotificationChangesOperation(previousServerChangeToken: nil)

    var notificationIDsToMarkRead = [CKNotificationID]()

    operation.notificationChangedBlock =  (notification: CKNotification) -> Void in
        // Process each notification received
        if notification.notificationType == .Query 
            let queryNotification = notification as! CKQueryNotification
            let reason = queryNotification.queryNotificationReason
            let recordID = queryNotification.recordID

            print("reason \(reason)")
            print("recordID \(recordID)")
            // Do your process here depending on the reason of the change

            // Add the notification id to the array of processed notifications to mark them as read
            notificationIDsToMarkRead.append(queryNotification.notificationID!)
        
    

    operation.fetchNotificationChangesCompletionBlock =  (serverChangeToken: CKServerChangeToken?, operationError: NSError?) -> Void in
        guard operationError == nil else 
            // Handle the error here
            return
        

        // Mark the notifications as read to avoid processing them again
        let markOperation = CKMarkNotificationsReadOperation(notificationIDsToMarkRead: notificationIDsToMarkRead)
        markOperation.markNotificationsReadCompletionBlock =  (notificationIDsMarkedRead: [CKNotificationID]?, operationError: NSError?) -> Void in
            guard operationError == nil else 
                // Handle the error here
                return
            
        

        let operationQueue = NSOperationQueue()
        operationQueue.addOperation(markOperation)
    

    let operationQueue = NSOperationQueue()
    operationQueue.addOperation(operation)

【讨论】：

这听起来不错。因为我观察到我有时会得到不止一次的推动。似乎我有prnding的

好的，现在看起来很好。我不知道我在测试设置期间进行了多少订阅，但是在重置部署环境后，它似乎也可以正常工作，而无需将通知标记为要读取。 THX 为所有答案