CODEWITHSUNDEEP
swiftalamofire
npatel
npatel

Reputation: 263

Swift - Waiting time for alamofire to finish

I am simply trying to get latitude and longitude of a city. But before alamofire can complete the request I receive the defined value of 0.0 which is not what I want. I do get the values of latitude and longitude but 0.0 has already been passed so the app takes that only.

I have tried completion block but it didn't work. I tried little tricks here and there but nothing worked. How should I improve this?

func getAddress(address:String){

    let key : String = "<API_KEY>"
    let postParameters:[String: Any] = [ "address": address,"key":key]
    let url : String = "https://maps.googleapis.com/maps/api/geocode/json"
    var lat = 0.0
    var long = 0.0

    Alamofire.request(url, method: .get, parameters: postParameters, encoding: URLEncoding.default, headers: nil).responseJSON {
        response in if let receivedResults = response.result.value
        {
            let resultParams = JSON(receivedResults)
            print(resultParams["status"]) // OK, ERROR
            lat = resultParams["results"][0]["geometry"]["location"]["lat"].doubleValue// approximately latitude
            long = resultParams["results"][0]["geometry"]["location"]["lng"].doubleValue // approximately longitude
            print("Here i am \(self.destLatitude)")
        }
        self.destLatitude = lat
        self.destLongitude = long
        print("Here i am also \(self.destLatitude)")
    }
}

Expected output is latitude and longitude of a place.

Upvotes: 0

Views: 149

Answers (1)

vadian
vadian

Reputation: 285064

The network request works asynchronously, assign the values to the properties inside the completion handler

Alamofire.request(url, method: .get, parameters: postParameters, encoding: URLEncoding.default, headers: nil).responseJSON {
    response in if let receivedResults = response.result.value
    {
        let resultParams = JSON(receivedResults)
        print(resultParams["status"]) // OK, ERROR
        lat = resultParams["results"][0]["geometry"]["location"]["lat"].doubleValue// approximately latitude
        long = resultParams["results"][0]["geometry"]["location"]["lng"].doubleValue // approximately longitude
        self.destLatitude = lat
        self.destLongitude = long
        print("Here i am \(self.destLatitude)")
    }
}

Upvotes: 2

Related Questions