How to get lat and long coordinates from address string - mapkit

Question

I have a MKMapView that has a UISearchBar on the top, and I want the user to be able to type a address, and to find that address and drop a pin on it. What I don't know is how to turn the address string into longitude and latitude, so I can make a CLLocation object. Does anyone know how I can do this?

Answer 1

You may find your answer in this question.
iOS - MKMapView place annotation by using address instead of lat / long By User Romes.
NSString *location = #"some address, state, and zip";
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
[geocoder geocodeAddressString:location
completionHandler:^(NSArray* placemarks, NSError* error){
if (placemarks && placemarks.count > 0) {
CLPlacemark *topResult = [placemarks objectAtIndex:0];
MKPlacemark *placemark = [[MKPlacemark alloc] initWithPlacemark:topResult];
MKCoordinateRegion region = self.mapView.region;
region.center = placemark.region.center;
region.span.longitudeDelta /= 8.0;
region.span.latitudeDelta /= 8.0;
[self.mapView setRegion:region animated:YES];
[self.mapView addAnnotation:placemark];
}
}
];
A Very simple solution. But only applicable on iOS5.1 or later.

Answer 2

I used a similar approach like Vijay, but had to adjust one line of code. region.center = placemark.region.center didn't work for me. Maybe my code helps someone as well:
let location: String = "1 Infinite Loop, CA, USA"
let geocoder: CLGeocoder = CLGeocoder()
geocoder.geocodeAddressString(location,completionHandler: {(placemarks: [CLPlacemark]?, error: NSError?) -> Void in
if (placemarks?.count > 0) {
let topResult: CLPlacemark = (placemarks?[0])!
let placemark: MKPlacemark = MKPlacemark(placemark: topResult)
var region: MKCoordinateRegion = self.mapView.region
region.center.latitude = (placemark.location?.coordinate.latitude)!
region.center.longitude = (placemark.location?.coordinate.longitude)!
region.span = MKCoordinateSpanMake(0.5, 0.5)
self.mapView.setRegion(region, animated: true)
self.mapView.addAnnotation(placemark)
}
})

Answer 3

For swift2
var location: String = "some address, state, and zip"
var geocoder: CLGeocoder = CLGeocoder()
geocoder.geocodeAddressString(location,completionHandler: {(placemarks: [CLPlacemark]?, error: NSError?) -> Void in
if (placemarks?.count > 0) {
var topResult: CLPlacemark = (placemarks?[0])!
var placemark: MKPlacemark = MKPlacemark(placemark: topResult)
var region: MKCoordinateRegion = self.mapView.region
region.center = placemark.region.center
region.span.longitudeDelta /= 8.0
region.span.latitudeDelta /= 8.0
self.mapView.setRegion(region, animated: true)
self.mapView.addAnnotation(placemark)
}
})

Answer 4

func geoCodeUsingAddress(address: NSString) -> CLLocationCoordinate2D {
var latitude: Double = 0
var longitude: Double = 0
let addressstr : NSString = "http://maps.google.com/maps/api/geocode/json?sensor=false&address=\(address)" as NSString
let urlStr = addressstr.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)
let searchURL: NSURL = NSURL(string: urlStr! as String)!
do {
let newdata = try Data(contentsOf: searchURL as URL)
if let responseDictionary = try JSONSerialization.jsonObject(with: newdata, options: []) as? NSDictionary {
print(responseDictionary)
let array = responseDictionary.object(forKey: "results") as! NSArray
let dic = array[0] as! NSDictionary
let locationDic = (dic.object(forKey: "geometry") as! NSDictionary).object(forKey: "location") as! NSDictionary
latitude = locationDic.object(forKey: "lat") as! Double
longitude = locationDic.object(forKey: "lng") as! Double
} catch {
}
}
var center = CLLocationCoordinate2D()
center.latitude = latitude
center.longitude = longitude
return center
}