Google Maps iOS Reverse Geocoding

Question

I am having an issue with Google Maps Reverse Geocoding when it comes to setting a UILabel's text to the reverse geocoded address. The UILabel is in an XIB use as a custom infowindow. I have another custom infowindow for other data that is working correctly however, it appears that when I try to set the label's text within the reverse geocode callback / completion handler, it doesn't work. Here is the code I have so far and I have tried the code multiple ways, including assigning it to variables and I have not been able to get anything to work.

let infoWindow = NSBundle.mainBundle().loadNibNamed("InfoWindowCurrent", owner: self, options: nil)[0] as! InfoWindowCurrent
let geocoder = GMSGeocoder()
let coordinate = CLLocationCoordinate2DMake(Double(self.locLatitude)!, Double(self.locLongitude)!)

var currentAddress = String()

geocoder.reverseGeocodeCoordinate(coordinate) { response , error in
    if let address = response?.firstResult() {
        let lines = address.lines! as [String]

        currentAddress = lines.joinWithSeparator("\n")
    }
}

infoWindow.labelAddressStreet.text = currentAddress

return infoWindow

I have also tried this:

let infoWindow = NSBundle.mainBundle().loadNibNamed("InfoWindowCurrent", owner: self, options: nil)[0] as! InfoWindowCurrent
let geocoder = GMSGeocoder()
let coordinate = CLLocationCoordinate2DMake(Double(self.locLatitude)!, Double(self.locLongitude)!)

geocoder.reverseGeocodeCoordinate(coordinate) { response , error in
    if let address = response?.firstResult() {
        let lines = address.lines! as [String]

        infoWindow.labelAddressStreet.text = lines.joinWithSeparator("\n")
    }
}

return infoWindow

Everything is connected correctly because the following code works:

let infoWindow = NSBundle.mainBundle().loadNibNamed("InfoWindowCurrent", owner: self, options: nil)[0] as! InfoWindowCurrent
let geocoder = GMSGeocoder()
let coordinate = CLLocationCoordinate2DMake(Double(self.locLatitude)!, Double(self.locLongitude)!)

geocoder.reverseGeocodeCoordinate(coordinate) { response , error in
    if let address = response?.firstResult() {
        let lines = address.lines! as [String]
    }
}

infoWindow.labelAddressStreet.text = "Unable to reverse geocode location!"

return infoWindow

Any help is definitely appreciated!

Answer 1

You are using a return out of the braces of the geocoding, for this reason the last code works. You should do something like this:

func getAddress(currentAdd : ( returnAddress :String)->Void){

    let infoWindow = NSBundle.mainBundle().loadNibNamed("InfoWindowCurrent", owner: self, options: nil)[0] as! InfoWindowCurrent
    let geocoder = GMSGeocoder()
    let coordinate = CLLocationCoordinate2DMake(Double(self.locLatitude)!,Double(self.locLongitude)!)


    var currentAddress = String()

    geocoder.reverseGeocodeCoordinate(coordinate) { response , error in
        if let address = response?.firstResult() {
            let lines = address.lines! as [String]

            currentAddress = lines.joinWithSeparator("\n")

            currentAdd(returnAddress: currentAddress)
        }
    }     
}

And call that function

  getAddress() { (returnAddress) in      

    print("\(returnAddress)")

    }