10

假设我有一个“物种”记录类型，其中包含由许多用户创建的公共记录。目前，我的查询检索“物种”的所有记录：

private func fetchSpecies() {
    // Fetch Public Database
    let publicDatabase = CKContainer.defaultContainer().publicCloudDatabase

    // Initialize Query
    let query = CKQuery(recordType: "Species", predicate: NSPredicate(format: "TRUEPREDICATE"))

    // Configure Query
    query.sortDescriptors = [NSSortDescriptor(key: "latinName", ascending: true)]

    // Perform Query
    publicDatabase.performQuery(query, inZoneWithID: nil) { (records, error) -> Void in
    dispatch_async(dispatch_get_main_queue(), { () -> Void in
        // Process Response on Main Thread
        self.processResponseForQuery(records, error: error)
        })
    }
}

如何仅获取当前用户（如设备所有者）创建的记录？

谢谢！

4

2 回答 2

10

我还在 Apple 开发者论坛上发帖，得到了一个很好的解决方案：

要仅获取特定的用户记录，您需要创建一个指向该用户 id (recordID) 的 CKReference，然后对其使用谓词。它看起来像这样：

首先获取用户记录id

yourContainer.fetchUserRecordIDWithCompletionHandler { (userID, error) -> Void in  
    if let userID = userID {  
        // here's your userID (recordID) to play with  
    }  
}

然后构造谓词：

let reference = CKReference(recordID: userID, action: .None)  
let predicate = NSPredicate(format: "creatorUserRecordID == %@", reference)  
let query = CKQuery(recordType: "Species", predicate: predicate)

然后正常使用查询。

快乐取货！

于 2016-04-13T00:32:34.707 回答
3

每个CKRecord人都有creatorUserRecordID财产；因此，您可以尝试先获得所有者userRecordID。然后，将其放入NSPredicate.

let container: CKContainer = CKContainer.defaultContainer()
let completionHandler: (CKRecordID?, NSError?) -> Void = { (userRecordID: CKRecordID?, error: NSError?) in
    if let userRecordID = userRecordID {
        let predicate = NSPredicate(format: "creatorUserRecordID == %@", userRecordID)
        let query = CKQuery(recordType: "Species", predicate: predicate)
        query.sortDescriptors = [NSSortDescriptor(key: "latinName", ascending: true)]
        container.publicCloudDatabase.performQuery(query, inZoneWithID: nil) { (records, error) -> Void in

        }
    }
}
//// Returns the user record ID associated with the current user.
container.fetchUserRecordIDWithCompletionHandler(completionHandler)
于 2016-02-08T14:36:22.893 回答