ios - 从 iPhone 传递字符串

Question

我正在尝试传递在我的 CloudKit 数据库中找到的每个 Play 的 color。

iPhone --> watch

iOS TableViewController:

func getCloudKit() {
    ///...
    let publicData = container.publicCloudDatabase
    publicData.performQuery(query, inZoneWithID: nil) { results, error in
        if error == nil { // There is no error
            for play in results! {
                let newPlay = Play()
                do {
                    try WatchSessionManager.sharedManager.updateApplicationContext(["color" : newPlay.teamColor])
                    NSLog("NewPColor: %@", newPlay.teamColor)
                } catch {
                    print(error)
                }
                self.objects.append(newPlay)
            }
        } else {
            print(error)
        }
    }
}

当我NSLog在iOS端传递的内容时，它完美地记录了3个颜色。

2015-09-25 21:10:28.706 Play[16444] NewPColor: FDB927
2015-09-25 21:10:28.707 Play[16444] NewPColor: 000000
2015-09-25 21:10:28.708 Play[16444] NewPColor: 000000

但是当我转到 watch 端时，colorLabel 中没有显示任何内容。 (我不确定 setText 是否被调用，因为“From iPhone”甚至没有出现。)

WatchKit InterfaceController:

func session(session: WCSession, didReceiveApplicationContext applicationContext: [String : AnyObject]) {
    let colorWatch = applicationContext["color"] as? String

    dispatch_async(dispatch_get_main_queue()) {
        if let colorWatch = colorWatch {
            self.colorLabel.setText("From iPhone: \(colorWatch)")
        }
    }
}

有什么想法吗？可以根据需要发布任何额外的代码，请告诉我。谢谢!

编辑:这里的每个问题都是我的WCSession代码

iOS WatchSessionManager

class WatchSessionManager: NSObject, WCSessionDelegate {

    static let sharedManager = WatchSessionManager()
    private override init() {
        super.init()
    }

    private let session: WCSession? = WCSession.isSupported() ? WCSession.defaultSession() : nil

    private var validSession: WCSession? {

        if let session = session where session.paired && session.watchAppInstalled {
            return session
        }
        return nil
    }

    func startSession() {
        session?.delegate = self
        session?.activateSession()
    }
}

extension WatchSessionManager {

    // Sender
    func updateApplicationContext(applicationContext: [String : AnyObject]) throws {
        if let session = validSession {
            do {
                try session.updateApplicationContext(applicationContext)
            } catch let error {
                throw error
            }
        }
    }

    // Receiver
    func session(session: WCSession, didReceiveApplicationContext applicationContext: [String : AnyObject]) {
        // handle receiving application context

        dispatch_async(dispatch_get_main_queue()) {
            // make sure to put on the main queue to update UI!
        }
    }
}

Answer 1

注意您在 appContext 字典中传递“newPlay”，但在您的日志中打印“newPlayoff”。

我假设您在别处设置了 WCSession 委托(delegate)并调用了 activateSession