CloudKit从当前用户获取所有订阅 [英] CloudKit fetch all subscriptions from the current user

问题描述

我设法在Apples CloudKit中保存，更改和删除记录。我甚至收到了订阅的通知，我找不到的是，我如何列出当前用户的所有订阅。

I manage to save, change and delete records in Apples CloudKit. I even got notifications working with subscriptions, what I can not find out is, how do i list all subscriptions for the current user.

这是我到目前为止的代码：

Here is my code so far:

let operation = CKFetchSubscriptionsOperation()
operation.fetchSubscriptionCompletionBlock = { (d, e) -> Void in
    println("got subscription")
    if e != nil {
        println("Error")
        dump(e)
    }
    dump(d)
}
publicDatabase.addOperation(operation)

我是什么得到的是：

got subscription
Error
- <CKError 0x14db0ed0: "Invalid Arguments" (12)> #0
- 0 key/value pairs

什么是无效参数的？我如何获得所有已保存订阅的列表？

What are the Invalid Arguments? And how do i get a list of all saved subscriptions?

推荐答案

如果您想对订阅做些什么，那么您可以使用以下内容：

If you want to do something with your subscriptions, then you could use something like this:

var database = CKContainer.defaultContainer().publicCloudDatabase
database.fetchAllSubscriptionsWithCompletionHandler({subscriptions, error in
        for subscriptionObject in subscriptions {
            var subscription: CKSubscription = subscriptionObject as CKSubscription
            ..
        }
    }

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