(WatchConnectivity) WCSession 缺少委托

如何解决(WatchConnectivity) WCSession 缺少委托

我正在尝试在手表和 iPhone 之间实现消息传递，其中手表是向手机发送数据的那个。它必须在后台发生，因此我正在使用 applicationContxt。但是，每当我尝试运行代码时，我都会收到这些错误： 有时它工作一次，手机接收数据，然后错误开始。

[WC] -[WCSession handleApplicationContextWithPairingID:]_block_invoke delegate (null) does not implement session:didReceiveApplicationContext:

[WC] WCSession is missing its delegate

import WatchConnectivity

class PhoneWorkingSet: NSObject,WCSessionDelegate {

    override init() {
        super.init()
       }
    
    func startSession() {
       if WCSession.isSupported() {
        let session = WCSession.default
        session.delegate = self
        session.activate()
        }
    }
    

    func session(_ session: WCSession,didReceiveApplicationContext applicationContext: [String : Any]) {
    
        print("Received: \(applicationContext)")
    }
    
    
    
    func session(_ session: WCSession,activationDidCompleteWith activationState: WCSessionActivationState,error: Error?) {
        if(!session.isReachable) {
            print("Watch not reachable")
        } else {
            print("Watch Reachable")
        }
    }
    
    func sessionDidBecomeInactive(_ session: WCSession) {
        print("has contentPending: \(session.hasContentPending)")
    }
    
    func sessionDidDeactivate(_ session: WCSession) {
        
    }
  

}