iOS10,Swift 3和FCM委托错误

"Value of type FIRmessaging has no member 'remotemessageDelegate'" on FIRmessaging.messaging().remotemessageDelegate = self

我从FCM设置指南中获取此代码段：

func application(_ application: UIApplication,didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.

    if #available(iOS 10.0,*) {
        let authOptions : UNAuthorizationOptions = [.alert,.badge,.sound]
        UNUserNotificationCenter.current().requestAuthorization(
            options: authOptions,completionHandler: {_,_ in })

        // For iOS 10 display notification (sent via APNS)
        UNUserNotificationCenter.current().delegate = self
        // For iOS 10 data message (sent via FCM)
        FIRmessaging.messaging().remotemessageDelegate = self //Get error on this line

    } else {
        let setTings: UIUserNotificationSetTings =
            UIUserNotificationSetTings(types: [.alert,.sound],categories: nil)
        application.registerUserNotificationSetTings(setTings)
        application.registerForRemoteNotifications()
    }