Ios 传递googleplaces数据

所以我试图将GMSPlace数据从GooglePlaces传递到UIView，然后从UIView传递到Firebase。我可以将其转换为字符串传递到UIView（“文本文本…（值）…文本”），但在用户按下确认按钮后，我想再次将该值传递给Firebase（因此不是UIView中的整个文本字符串）。当我点击确认按钮时，我的应用程序崩溃。感谢所有帮助

// MARK: GOOGLE AUTO COMPLETE DELEGATE

func viewController(_ viewController: GMSAutocompleteViewController, didAutocompleteWith place: GMSPlace) {

    let placeID = place.placeID

    placesClient.lookUpPlaceID(placeID, callback: { (place, error) -> Void in
        if let error = error {
            print("lookup place id query error: \(error.localizedDescription)")
            return
        }

        guard let place = place else {
            print("No place details for \(placeID)")
            return
        }
        print("Place name \(place.name)")
        print("Place address \(place.formattedAddress)")
        print("Place placeID \(place.placeID)")
        print("Place attributions \(place.attributions)")
    })

    let selectedPlace = place.formattedAddress
    if let name = selectedPlace as String!
    {
        self.placeNameLabel.text = "Are you sure you would like to add \(name) to your places?"
    }
    self.dismiss(animated: true, completion: nil)
    setupConfirmationPopUp()   
}

// user taps button to send item to be updated in Firebase data tree
func confirmAddPlace(place: GMSPlace) {

    // add place to tableview array
    let accessToken = FBSDKAccessToken.current()
    guard let accessTokenString = accessToken?.tokenString else { return }

    let credentials = FIRFacebookAuthProvider.credential(withAccessToken: accessTokenString)
    FIRAuth.auth()?.signIn(with: credentials, completion: { (user, error) in
        if error != nil {
            print("Something went wrong with our FB user: ", error ?? "")
            return
    }

        // create place on tap pf confirm
        let ref = FIRDatabase.database().reference().child("places")
        let childRef = ref.childByAutoId()
        let values = ["place": place.formattedAddress, "name": user!.displayName]
        childRef.updateChildValues(values)
})

    animateOut()
}

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它在哪一行崩溃？？它在控制台中给我错误“libc++abi.dylib:以NSException类型的未捕获异常终止”，然后在AppDelegate文件中崩溃。当我让value=[“place”：self.placeNameLabel.text，“name”：user！.displayName]时，应用程序会很好地传递值，但当我将其更改为让value=[“place”时：place.formattedAddress，“name”：user！.displayName]它崩溃。因此，place.formattedAddress的设置导致它崩溃。看起来唯一的区别是

place

或

formattedAddress

可能为零。请将它们展开，确保它们没有引起问题。