Google Analytics（分析）无法正确追踪流量来源

Question

Google Analytics（分析）无法正确跟踪来自facebook / instagram和其他平台的流量来源/媒介。有大量的流量作为源/介质不存在

let onesignalInitSettings = [kOSSettingsKeyAutoPrompt：false]

    OneSignal.initWithLaunchOptions(launchOptions, appId: AppLibraryKeys.OneSignalAppId, handleNotificationReceived: { [weak self](notification) in

        if let payload = notification?.payload {
            self?.handleOneSignalPayload(payload)
        }

        }, handleNotificationAction: { [weak self](result) in
            if let payload = result?.notification.payload {
                self?.handleOneSignalPayload(payload)
            }
    }, settings: onesignalInitSettings)

    OneSignal.inFocusDisplayType = OSNotificationDisplayType.notification;
    OneSignal.promptForPushNotifications(userResponse: { accepted in
        print("User accepted notifications: \(accepted)")
    })
    OneSignal.add(self)

      fileprivate func handleOneSignalPayload(_ payload:OSNotificationPayload){

    guard payload.additionalData != nil else {
        return
    }

    if let utmUrl = URL(string: (payload.additionalData["utm_link"] as? String) ?? "") {
        APPDELEGATE.window?.rootViewController?.logCrashlyticsWith(
            key: CrashlyticLogsEvents.SourceLoggedFromNotifications,
            value: utmUrl.absoluteString)
        logSources(url: utmUrl)
    }

} 私有函数logSources（url：URL）{

    let urlString = url.absoluteString

    guard let tracker = GAI.sharedInstance().defaultTracker else { return }

    // setCampaignParametersFromUrl: parses Google Analytics campaign ("UTM")
    // parameters from a string url into a Map that can be set on a Tracker.
    let hitParams = GAIDictionaryBuilder()

    // Set campaign data on the map, not the tracker directly because it only
    // needs to be sent once.

// [hitParams setCampaignParametersFromUrl：urlString];         hitParams.setCampaignParametersFromUrl（urlString）

    // Campaign source is the only required campaign field. If previous call
    // did not set a campaign source, use the hostname as a referrer instead.

    let hitParamsDict = hitParams.build()
    tracker.set(kGAIScreenName, value: "AppDelegate")

    let builder = GAIDictionaryBuilder.createScreenView().setAll(hitParamsDict as! [AnyHashable : Any])
    tracker.send(builder?.build() as! [AnyHashable : Any])

}