ios - CloudKit 响应时间慢？

Question

我正在尝试从 Parse 切换到 CloudKit，到目前为止我的示例可以正常工作。我有一个看起来像这样的 CLoudKitModel:

class CloudKitModel {
    let container: CKContainer
    let privateDB: CKDatabase
    let publicDB: CKDatabase

    init() {
        container = CKContainer.defaultContainer()
        privateDB = container.privateCloudDatabase
        publicDB = container.publicCloudDatabase
    }

    func getPlayers(completionHandler: (data: [CloudKitPlayers]?, success: Bool) -> ()) {
        var playerArray = [CloudKitPlayers]()
        let predicate = NSPredicate(value: true)
        let sort = NSSortDescriptor(key: "sortID", ascending: true)
        let query = CKQuery(recordType: "Player", predicate: predicate)
        query.sortDescriptors = [sort]

        let operation = CKQueryOperation(query: query)

        operation.recordFetchedBlock = { (record) in
            let players = CloudKitPlayers()
            players.age = record["age"] as! Int
            players.name = record["name"] as! String
            players.nickname = record["nickname"] as! String
            players.position = record["position"] as! String

            let imageData = record["image"] as! CKAsset
            players.image = UIImage(contentsOfFile: imageData.fileURL.path!)

            playerArray.append(players)
        }

        operation.queryCompletionBlock = { (cursor, error) in
            if error == nil {
                print("Fetched all players")
                if playerArray.count > 0 {
                    completionHandler(data: playerArray, success: true)
                } else {
                    completionHandler(data: nil, success: false)
                }
            }
        }

        self.publicDB.addOperation(operation)
    }
}

我在 UITableViewController 中调用这个 getPlayers(completionHandler: ) 函数:

override func viewDidAppear(animated: Bool) {
    super.viewDidAppear(animated)

    let cloudKit = CloudKitModel()
    cloudKit.getPlayers { (data, success) in
        if success {
            if let playerArray = data {
                self.players = playerArray
                dispatch_async(dispatch_get_main_queue(), {
                    self.tableView.reloadData()
                })
                print("reloaded tableView")
            }
        } else {
            print("no success")
        }
    }
}

问题是:在 TableView 中显示名称平均需要大约 10 秒。这并不是说我一次得到一千条记录，这些只是我从 iCloud 加载的 8 个数据集。我读到我应该在主线程上执行 tableView.reloadData()，但这也没有帮助。

是否还有其他我遗漏的东西或如何调试它的特定方法？与 Parse 相比，这个解决方案慢了 10 倍......

感谢任何想法!

Answer 1

你能试试设置QOS吗？

operation.qualityOfService = .UserInitiated