Question

说我有一个＆＃39;物种＆＃39;包含由许多用户创建的公共记录的记录类型。目前，我的查询检索了＆＃39; Species＆＃39;：

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)
        })
    }
}

如何才能获取当前用户创建的记录（如设备所有者）？

谢谢！

Answer 1

我也在Apple开发者论坛上发帖，我收到了excellent solution：

要仅获取特定用户记录，您需要创建指向该用户ID（recordID）的CKReference，然后在其上使用谓词。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。


快乐的取材！

Answer 2

每个CKRecord都有creatorUserRecordID属性;因此，您可以先尝试获取所有者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)

如何获取当前用户创建的所有CloudKit记录？

2 个答案: