How to get lat and long coordinates from address string
Solution 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.
Solution 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)
}
})
Solution 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)
}
})
Chandler De Angelis
I am a Senior iOS Developer at Mammoth Media living in Santa Monica. Making iOS apps is my expertise, and I dabble in front end web development. You can find everything about my career, including my resume, github, linkedin, and portfolio on my personal website.
Updated on July 23, 2022Comments
-
Chandler De Angelis almost 2 years
I have a
MKMapView
that has aUISearchBar
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 aCLLocation
object. Does anyone know how I can do this?