Question

您好，我在FirstVC中有一个按钮，在SecondVC中我在navigationBar上有一个搜索框，它是Google自动填充搜索栏，用户在其中输入内容并显示地点。我想要的是当用户点击按钮并且第二个VC来时，一旦用户选择了该位置，第一个VC应该显示在secondVC上选择的数据而无需用户按下任何操作按钮。

在实施Google自动填充功能之前，我在TableView中显示数据库中的位置，我通过在didSelectRowAtIndexPath中编写一些代码将用户重定向到第一个控制器，一切正常。它不在这里工作。我会把我的代码粘贴到我现在正在做的事情

FirstVC：

class AddRequestTableViewController:GooglePlacesViewControllerDelegate{


func country(place: GMSPlace!) {
        dismissKeyboard()

         print("Place name: ", place.name)
    }

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject!) {


            let destination = segue.destinationViewController as!   GooglePlacesViewController

            destination.delegate = self



        }

}

SecondVC

protocol GooglePlacesViewControllerDelegate {
    func country(place: GMSPlace!,departureOrArrivalSegue:Int)
}
class GooglePlacesViewController: UIViewController {
     var delegate : GooglePlacesViewControllerDelegate! = nil
    var resultsViewController: GMSAutocompleteResultsViewController?
    var searchController: UISearchController?
    var resultView: UITextView?
    var locationManager = CLLocationManager()
    var placesClient : GMSPlacesClient?
    var departureOrArrivalSegue:Int?

    override func viewDidLoad() {
        super.viewDidLoad()
               //locationManager.startUpdatingLocation()
        // locationManager = CLLocationManager()
        // locationManager.delegate = self
        //locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.requestAlwaysAuthorization()
        //locationManager.startUpdatingLocation()
        //locationManager.startMonitoringSignificantLocationChanges()


        resultsViewController = GMSAutocompleteResultsViewController()
        resultsViewController?.delegate = self

        searchController = UISearchController(searchResultsController: resultsViewController)
        searchController?.searchResultsUpdater = resultsViewController

        // Put the search bar in the navigation bar.
        searchController?.searchBar.sizeToFit()
        self.navigationItem.titleView = searchController?.searchBar

        // When UISearchController presents the results view, present it in
        // this view controller, not one further up the chain.
        self.definesPresentationContext = true

        // Prevent the navigation bar from being hidden when searching.
        searchController?.hidesNavigationBarDuringPresentation = false

        let camera = UIBarButtonItem(barButtonSystemItem: .Done, target: self, action: Selector("btnOpenCamera"))
        self.navigationItem.leftBarButtonItem = camera

        placesClient = GMSPlacesClient()


        run()


    }


    func run(){

        placesClient?.currentPlaceWithCallback({
            (placeLikelihoodList: GMSPlaceLikelihoodList?, error: NSError?) -> Void in
            if let error = error {
                print("Pick Place error: \(error.localizedDescription)")
                return
            }
            if let placeLicklihoodList = placeLikelihoodList {

                let  place = placeLicklihoodList.likelihoods.first! as GMSPlaceLikelihood
                if let place : GMSPlaceLikelihood = place {
                    print("place is \(place.place.formattedAddress)")
                }
            }
        })

    }



}

// Handle the user's selection.
extension GooglePlacesViewController: GMSAutocompleteResultsViewControllerDelegate {
    func resultsController(resultsController: GMSAutocompleteResultsViewController!,
                           didAutocompleteWithPlace place: GMSPlace!) {
        searchController?.active = false
        // Do something with the selected place.
        print("Place name: ", place.name)
        print("Place address: ", place.formattedAddress)
        print("Place attributions: ", place.attributions)
        print("cordinates are \(place.coordinate)")
        delegate.country(place)

    }

    func resultsController(resultsController: GMSAutocompleteResultsViewController!,
                           didFailAutocompleteWithError error: NSError!){
        // TODO: handle the error.
        print("Error: ", error.description)
    }

    // Turn the network activity indicator on and off again.
    func didRequestAutocompletePredictionsForResultsController(resultsController: GMSAutocompleteResultsViewController!) {
        UIApplication.sharedApplication().networkActivityIndicatorVisible = true
    }

    func didUpdateAutocompletePredictionsForResultsController(resultsController: GMSAutocompleteResultsViewController!) {
        UIApplication.sharedApplication().networkActivityIndicatorVisible = false
    }
}

Answer 1

您的委托方法是：

func country(place: GMSPlace!,departureOrArrivalSegue:Int)

但你只打电话：

delgate.country(place)

您是否收到编译错误？您的委托调用应该有另一个参数。

您的GooglePlacesViewController＆＃39;尚未声明自己是＆＃39; resultsViewController＆＃39;的代表。你打电话给：

resultsViewController?.delegate = self

所以你的GooglePlacesViewController＆＃39;应该看起来像这样：

class GooglePlacesViewController: UIViewController, GMSAutocompleteResultsViewControllerDelegate {

你如何接收编译器错误超出了我的范围。你在使用nano吗？

从第二个控制器将数据发送回上一个控制器，它显示Google自动填充搜索位置

1 个答案: