Question

我在端口9091上配置了在Amazon EC2实例上运行LiveQuery的解析服务器，没有代理，进行了防火墙配置。它似乎运行正常，因为我们在React上测试并使用http://www.websocket.org/echo.html，告诉它连接成功。

然而，在iOS上，我无法使LiveQuery正常工作，即使handleSubscribe似乎没问题。

我创建了一个简单的viewController来尝试它：

import UIKit
import Parse
import ParseLiveQuery

class StatsViewController: UIViewController {

    @IBAction func insertMessage(sender: AnyObject) {
        let message = Message();
        message.author = PFUser.currentUser()
        message.authorName = message.author?.username
        message.text = "Hello: \(NSDate())"
        message.roomName = "Test";

        message.saveInBackground();
    }

    var myQuery: PFQuery {
        return (Message.query()?
            .whereKey("roomName", equalTo: "2")
            .orderByAscending("createdAt"))!
    }

    var subscription: Subscription<Message>? = nil

    override func viewDidLoad() {
        super.viewDidLoad()

        //Registers the subclass
        Message.registerSubclass();
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    override func viewDidAppear(animated: Bool) {

        //1) queries for messages, working.
        myQuery.findObjectsInBackground().continueWithBlock() { res in
            for msg in ((res.result as? [Message]))! {
                print(msg);
            }
            return nil
        }

        //2) try to subscribe and receive any information from the server
        subscription = myQuery.subscribe()

        subscription!.handleEvent { query, event in
            // Handle event
            print("any event, please?"); //no events handled after creating a new message
        }

        subscription!.handle(Event.Created) { query, object in
            // Called whenever an object was created
            print("any creation, please?"); //no events handled after creating a new message
        }

        subscription!.handleError { (query, err) in
            print("any error, please?"); //no errors handled
        }

        subscription!.handleSubscribe { query in
            print("subscribed")
        }
    }

}

我也尝试使用解析示例中的代码进行订阅，例如

func subscribeToUpdates() {
    subscription = liveQueryClient
        .subscribe(messagesQuery)
        .handle(Event.Created) { _, message in
            self.printMessage(message)
    }
}

订阅过程中是否有任何错误或遗漏？

谢谢！

Answer 1

尝试添加

   Message.registerSubclass();

在Parse配置设置之前

Answer 2

我在Xcode 8.1 iOS 10.1中使用它，它可以工作。

str

解析LiveQuery订阅不会收到任何事件

2 个答案: