ios - WatchConnectivity：didReceiveApplicationContext 永远不会被调用，尽管上下文已更新

问题描述

我遇到了以下问题：我能够在 iPhone 和 Watch（模拟器和真实设备）上启动 WCSessions，并且可以很好地使用 sendMessage 方法。我知道 updateApplicationContext 需要发送更新的字典，所以我添加了一个 uuid 用于调试目的：

context = ["user":id,"messageId": UUID().uuidString]

调用该方法时没有引发错误，但在观察端 didReceiveApplicationContext 永远不会被调用，并且 receivedApplicationContext 字典一直保持为空。在阅读了很多类似的代码示例和文档后，我看不出我错在哪里。

我正在使用 XCode 12.5 和 iOS 14.5 以及 watchOS 7.4 构建

这是处理 WCSession 的 iOS 代码，上下文在另一个方法中设置，并成功传输 withsendMessage 但不是 with updateApplicationContext：

import WatchConnectivity

public class CDVSettings : CDVPlugin, WCSessionDelegate {

var wcSession : WCSession! = nil

var didSendMessage:Bool = false

var context: [String : Any] = [:] {
    didSet {
        debugPrint("context didSet:", self.context)
        debugPrint("WCSession.isPaired: \(wcSession.isPaired), WCSession.isWatchAppInstalled: \(wcSession.isWatchAppInstalled)")
        if wcSession.activationState == WCSessionActivationState.activated {
            do {
                debugPrint("updateApplicationContext is called")
                self.didSendMessage=true
                try wcSession.updateApplicationContext(self.context)
            }
            catch let error as NSError {
                debugPrint(error.localizedDescription)
            }
            catch {}
            wcSession.sendMessage(self.context, replyHandler: { reply in
                print("Got reply: \(reply)")
            }, errorHandler: { error in
                print("error: \(error)")
            })
        } else {
            print("activationState is not activated")
            wcSession.activate()
        }
    }
}

public func session(_ session: WCSession, activationDidCompleteWith activationState: WCSessionActivationState, error: Error?) {
    print("activationDidCompleteWith activationState:\(activationState) error:\(String(describing: error))")
}

public func sessionDidBecomeInactive(_ session: WCSession) {
    
}

public func sessionDidDeactivate(_ session: WCSession) {

}

@objc(pluginInitialize)
public override func pluginInitialize() {
    wcSession = WCSession.default
    wcSession.delegate = self
    wcSession.activate()
}

[...]

}

这是手表部分：

    import WatchConnectivity
    
    class ConnectivityRequestHandler: NSObject, ObservableObject, WCSessionDelegate {
    
    var session = WCSession.default

    override init() {
        super.init()
        session.delegate = self
        session.activate()
        debugPrint("ConnectivityRequestHandler started with session", session)
    }
        
    // MARK: WCSession Methods
    
    func session(_ session: WCSession, activationDidCompleteWith activationState: WCSessionActivationState, error: Error?) {
        debugPrint(error)
        debugPrint("session is reachable:",session.isReachable)
        debugPrint("last received application context:",session.receivedApplicationContext)
    }
    
    
   func session(_ session: WCSession, didReceiveMessage message: [String: Any], replyHandler: @escaping ([String: Any]) -> Void) {
        debugPrint("didReceiveMessage: \(message)")
        replyHandler(["message received": Date()])
    }
    
    func session(_ session: WCSession, didReceiveMessageData messageData: Data, replyHandler: @escaping (Data) -> Void) {
        debugPrint("didReceiveMessageData: \(messageData)")
    }
    
    func session(_ session: WCSession, didReceiveApplicationContext applicationContext: [String : Any]) {
        debugPrint("did receive application context")
        debugPrint(applicationContext)
            if let id = applicationContext["user"] as? [String]{
                debugPrint("\(id)")
                UserDefaults.standard.set(id, forKey: "user")
            }
        }

}

iOS上对应的日志

“上下文didSet：”[“用户”：“0e4a28b5-f8a0-40a5-942d-5f13b610a93a”，“messageId”：“8A78246C-91E6-48DC-B55D-4F4EBC761211”]“WCSession.isPaired：真，WCSession.isWatchAppInstalled：真" "updateApplicationContext is called" 得到回复: ["收到消息": 2021-09-03 08:31:54 +0000]

在 watchOS 上

“ConnectivityRequestHandler 开始与会话”<WCSession：0x600003be0b40，hasDelegate：YES，activationState：0> nil“会话可达：”true“最后收到的应用程序上下文：”[：]“didReceiveMessage：[”user”：0e4a28b5-f8a0-40a5 -942d-5f13b610a93a，“消息 ID”：8A78246C-91E6-48DC-B55D-4F4EBC761211]”

我究竟做错了什么？非常感谢你的帮助。

标签： iosswiftwatchkitwatchoswatchconnectivity

ios - WatchConnectivity：didReceiveApplicationContext 永远不会被调用，尽管上下文已更新

问题描述

解决方案

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