相关疑难解决方法(0)

我正在使用CallKit和PushKit在Swift中开发软电话。在iOS 13之前，VoIP通知运行良好。但是，在iOS 13更新之后，我的应用程序在后台运行时没有收到VoIP推送通知。在前台didReceiveIncomingPushWith被调用，但在后台不被调用。

如何解决此问题？

码

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.
    print("\(#function)")
    let voipPushResgistry = PKPushRegistry(queue: nil)
    voipPushResgistry.delegate = self
    voipPushResgistry.desiredPushTypes = [PKPushType.voIP]

    return true
}

func pushRegistry(_ registry: PKPushRegistry, didInvalidatePushTokenFor type: PKPushType) {
    print("\(#function) token invalidated")
}

func pushRegistry(_ registry: PKPushRegistry, didUpdate credentials: PKPushCredentials, for type: PKPushType) {
    let deviceToken = credentials.token.reduce("", {$0 + String(format: "%02X", $1) })
    print("\(#function) token is: \(deviceToken)")
}

func …