快速从 MKLocalSearch 对象中检索第一个“mapItem”元素

Question

first I want to say I'm new to the swift language.

My question almost mirrors this question: Accessing MKLocalSearchResponse item (swift)

However, when I apply this to my similar looking code I get an error "Value of type 'MKLocalSearch' has no member 'mapItems'"

Like in the link above I want the first mapItems (mapItems[0]) result. Can anybody help me?

Heres my code:

    let latitude = String(currentLocation.coordinate.latitude)
    let longitude = String(currentLocation.coordinate.longitude)

    var station1Unwrapped: String! = ""
    var station2Unwrapped: String! = ""

    var coord: CLLocationCoordinate2D!
    coord = CLLocationCoordinate2DMake(currentLocation.coordinate.latitude, currentLocation.coordinate.longitude);
    var region: MKCoordinateRegion!
    region = MKCoordinateRegion(center: coord, latitudinalMeters: 100, longitudinalMeters: 100);

    let request = MKLocalSearch.Request()
    request.naturalLanguageQuery = "Train Station"
    request.region = region

    let search = MKLocalSearch(request: request)
    search.start { response, error in
        guard let response = response else {
            print("There was an error searching for: \(String(describing: request.naturalLanguageQuery)) error: \(String(describing: error))")
            return
        }

        print("Inside function")

        let station1 = response.mapItems[0].name


    }

    var newLocVar = (search.mapItems[0] as! MKMapItem).name
    print(newLocVar)

Answer 1

The variable search is MKLocalSearch , so it doesn't has property mapItems . If you want to print the MKMapItem's name , you should access the mapItems in the completion block, where you get access to the response which is MKLocalSearch.Response . The line you write let station1 = response.mapItems[0].name is perfectly correct and it contains the name of the first mapItems found