Get latitude and longitude based on Address using Geocoder class in iOS - ios

Question

I got the current location based on the Longitude and Latitude values and then I also got multiple places on google map using Annotation. Now I want to get the longitude and latitude values based on the Address( i.e street,city and county).Need some guidance on how this can be achieved.
Till now, this is what I have tried:-
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
#synthesize streetField = _streetField, cityField = _cityField, countryField = _countryField, fetchCoordinatesButton = _fetchCoordinatesButton, nameLabel = _nameLabel, coordinatesLabel = _coordinatesLabel;
#synthesize geocoder = _geocoder;
- (void)viewDidLoad
{
[super viewDidLoad];
_streetField.delegate=self;
_cityField.delegate=self;
_countryField.delegate=self;
// Do any additional setup after loading the view, typically from a nib.
}
- (IBAction)fetchCoordinates:(id)sender {
NSLog(#"Fetch Coordinates");
if (!self.geocoder) {
NSLog(#"Geocdoing");
self.geocoder = [[CLGeocoder alloc] init];
}
NSString *address = [NSString stringWithFormat:#"%# %# %#", self.streetField.text, self.cityField.text, self.countryField.text];
NSLog(#"GET Addres%#",address);
self.fetchCoordinatesButton.enabled = NO;
[self.geocoder geocodeAddressString:address completionHandler:^(NSArray *placemarks, NSError *error) {
NSLog(#"Fetch Gecodingaddress");
if ([placemarks count] > 0) {
CLPlacemark *placemark = [placemarks objectAtIndex:0];
NSLog(#"GET placemark%#",placemark);
CLLocation *location = placemark.location;
NSLog(#"GET location%#",location);
CLLocationCoordinate2D coordinate = location.coordinate;
self.coordinatesLabel.text = [NSString stringWithFormat:#"%f, %f", coordinate.latitude, coordinate.longitude];
NSLog(#"CoordinatesLabel%#",self.coordinatesLabel.text);
if ([placemark.areasOfInterest count] > 0) {
NSString *areaOfInterest = [placemark.areasOfInterest objectAtIndex:0];
self.nameLabel.text = areaOfInterest;
NSLog(#"NameLabe%#",self.nameLabel.text);
}
}
self.fetchCoordinatesButton.enabled = YES;
}];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(BOOL)textFieldShouldReturn:(UITextField *)textField
{
[textField resignFirstResponder];
return YES;
}
#end
Above code is not working to give me the latitude and longitude.Need some help on what am I doing wrong here or if I am missing on something.
Thanks in Advance.

Answer 1

This was very old answer, Kindly check with new Updates
EDIT:
Before using this check with iOS8 updation
NSLocationAlwaysUsageDescription
NSLocationWhenInUseUsageDescription
This is for getting lat and long based user area like street name,state name,country.
-(CLLocationCoordinate2D) getLocationFromAddressString: (NSString*) addressStr {
double latitude = 0, longitude = 0;
NSString *esc_addr = [addressStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSString *req = [NSString stringWithFormat:#"http://maps.google.com/maps/api/geocode/json?sensor=false&address=%#", esc_addr];
NSString *result = [NSString stringWithContentsOfURL:[NSURL URLWithString:req] encoding:NSUTF8StringEncoding error:NULL];
if (result) {
NSScanner *scanner = [NSScanner scannerWithString:result];
if ([scanner scanUpToString:#"\"lat\" :" intoString:nil] && [scanner scanString:#"\"lat\" :" intoString:nil]) {
[scanner scanDouble:&latitude];
if ([scanner scanUpToString:#"\"lng\" :" intoString:nil] && [scanner scanString:#"\"lng\" :" intoString:nil]) {
[scanner scanDouble:&longitude];
}
}
}
CLLocationCoordinate2D center;
center.latitude=latitude;
center.longitude = longitude;
NSLog(#"View Controller get Location Logitute : %f",center.latitude);
NSLog(#"View Controller get Location Latitute : %f",center.longitude);
return center;
}
call the method like this in viewdidload method or somewhere according to your project
[self getLocationFromAddressString:#"chennai"];
just pass this in your browser
http://maps.google.com/maps/api/geocode/json?sensor=false&address=chennai
and you will have json format with lat and lon
http://maps.google.com/maps/api/geocode/json?sensor=false&address=#"your city name here"
NSString *address = [NSString stringWithFormat:#"http://maps.google.com/maps/api/geocode/json?sensor=false&address=%# %# %#", self.streetField.text, self.cityField.text, self.countryField.text];
the usage of this method....
CLLocationCoordinate2D center;
center=[self getLocationFromAddressString:#"uthangarai"];
double latFrom=&center.latitude;
double lonFrom=&center.longitude;
NSLog(#"View Controller get Location Logitute : %f",latFrom);
NSLog(#"View Controller get Location Latitute : %f",lonFrom);

Answer 2

Someone looking for Swift 2.0 solution can use below :
let address = "1 Infinite Loop, CA, USA"
let geocoder = CLGeocoder()
geocoder.geocodeAddressString(address, completionHandler: {(placemarks, error) -> Void in
if((error) != nil){
print("Error", error)
}
if let placemark = placemarks?.first {
let coordinates:CLLocationCoordinate2D = placemark.location!.coordinate
coordinates.latitude
coordinates.longitude
print("lat", coordinates.latitude)
print("long", coordinates.longitude)
}
})

Answer 3

Try this,
NSString *address = [NSString stringWithFormat:#"%#,%#,%#", self.streetField.text, self.cityField.text,self.countryField.text];
[self.geocoder geocodeAddressString:address completionHandler:^(NSArray *placemarks, NSError *error)
{
if(!error)
{
CLPlacemark *placemark = [placemarks objectAtIndex:0];
NSLog(#"%f",placemark.location.coordinate.latitude);
NSLog(#"%f",placemark.location.coordinate.longitude);
NSLog(#"%#",[NSString stringWithFormat:#"%#",[placemark description]]);
}
else
{
NSLog(#"There was a forward geocoding error\n%#",[error localizedDescription]);
}
}
];

Answer 4

Swift
public func getLocationFromAddress(address : String) -> CLLocationCoordinate2D {
var lat : Double = 0.0
var lon : Double = 0.0
do {
let url = String(format: "https://maps.google.com/maps/api/geocode/json?sensor=false&address=%#", (address.addingPercentEncoding(withAllowedCharacters: .urlPathAllowed)!))
let result = try Data(contentsOf: URL(string: url)!)
let json = JSON(data: result)
lat = json["results"][0]["geometry"]["location"]["lat"].doubleValue
lon = json["results"][0]["geometry"]["location"]["lng"].doubleValue
}
catch let error{
print(error)
}
return CLLocationCoordinate2D(latitude: lat, longitude: lon)
}
I used SwiftyJSON but you can parse the JSON response however you want

Answer 5

- (IBAction)forwardButton:(id)sender
{
if([self.address.text length])
{
NSString *place = self.address.text;
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
__unsafe_unretained RTGeoCoderViewController *weakSelf = self;
[geocoder geocodeAddressString:place completionHandler:^(NSArray* placemarks, NSError* error)
{
NSLog(#"completed");
if ( error )
{
NSLog(#"error = %#", error );
dispatch_async(dispatch_get_main_queue(),
^{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Error" message:[self errorMessage:error.code] delegate:nil cancelButtonTitle:nil otherButtonTitles:#"OK", nil];
[alert show];
});
}
else
{
NSLog(#"%#",placemarks);
}
}];
}
}

Answer 6

Try this
- (void)getAddressFromAdrress:(NSString *)address withCompletationHandle:(void (^)(NSDictionary *))completationHandler {
CLGeocoder *geoCoder = [[CLGeocoder alloc] init];
//Get the address through geoCoder
[geoCoder geocodeAddressString:address completionHandler:^(NSArray *placemarks, NSError *error) {
if ([placemarks count] > 0 && !error) {
//get the address from placemark
CLPlacemark *placemark = [placemarks objectAtIndex:0];
NSString *locatedAt = [[placemark.addressDictionary valueForKey:#"FormattedAddressLines"] componentsJoinedByString:#", "];
CLLocation *location = placemark.location;
CLLocationCoordinate2D coordinate = location.coordinate;
_latitudeUserLocation = coordinate.latitude;
_longitudeUserLocation = coordinate.longitude;
NSString *postalCode = placemark.addressDictionary[(NSString*)kABPersonAddressZIPKey];
if (postalCode == nil) postalCode = #"";
if (locatedAt == nil) locatedAt = #"";
NSDictionary *dictionary = [NSDictionary dictionaryWithObjectsAndKeys:
postalCode ,kPostalCode,
locatedAt ,kFullAddress,
nil];
completationHandler(dictionary);
} else {
completationHandler(nil);
}
}];
}