如何修复 [WC] 由于缺少委托 Swift 而拒绝激活

Question

你好我有这个功能

extension UIViewController: WCSessionDelegate {
public func session(_ session: WCSession, activationDidCompleteWith activationState: WCSessionActivationState, error: Error?) {        
}
public func sessionDidBecomeInactive(_ session: WCSession) {

}
public func sessionDidDeactivate(_ session: WCSession) {
}


//MARK: -SYNC DATA TO APPLE WATCH

func syncToAppleWatch(){
    var session: WCSession?
    if WCSession.isSupported() {//4.1
      session?.delegate = self
      session = WCSession.default//4.2
      session?.activate()//4.4
    }

}

我在 DidLoad 中调用 "syncToAppleWatch"。但是我收到这个错误

 [WC] denying activation due to missing delegate
 [WC] WCSession has not been activated

我该如何解决？

Answer 1

这两行没有意义

session?.delegate = self  // session is still nil here, delegate won't be set
session = WCSession.default

将顺序更改为

session = WCSession.default
session?.delegate = self

如何修复 [WC] 由于缺少委托 Swift 而拒绝激活

How to fix [WC] denying activation due to missing delegate Swift

uiviewcontroller

swift

watchconnectivity

wcsession