MapKit API and Add an Annotation on Map

Drag and Drop Map View

 Add CoreLocation and MapKit Frameworks

For setting Fake Location

Simulate Other Locations

For .h file

#import <UIKit/UIKit.h>

#import <MapKit/MapKit.h>

@interface MyLocationViewController : UIViewController <MKMapViewDelegate>

@property (nonatomic, strong) IBOutlet MKMapView *mapView;

@end

For .m file

@interface MyLocationViewController ()

@end

@implementation MyLocationViewController

@synthesize mapView;

.

.

.

- (void)viewDidLoad

{

    [super viewDidLoad];

    self.mapView.delegate = self;

}

- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation

{

//a region that is 800 by 800 meters around the user’s location.

    MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(userLocation.coordinate, 800, 800);

    [self.mapView setRegion:[self.mapView regionThatFits:region] animated:YES];

// Add an annotation

    MKPointAnnotation *point = [[MKPointAnnotation alloc] init];

    point.coordinate = userLocation.coordinate;

    point.title = @"Where am I?";

    point.subtitle = @"I'm here!!!";

    

    [self.mapView addAnnotation:point];

}

Forward Geo-coding

Forward geocoding means you’re starting with an address and are seeking coordinates

NSString *address = @"1 Infinite Loop, CA, USA";

CLGeocoder *geocoder = [[CLGeocoder alloc] init];

[geocoder geocodeAddressString:address completionHandler:^(NSArray* placemarks, NSError* error){

// Check for returned placemarks

 if (placemarks && placemarks.count > 0) {

CLPlacemark *topResult = [placemarks objectAtIndex:0];

// Create a MLPlacemark and add it to the map view

MKPlacemark *placemark = [[MKPlacemark alloc] initWithPlacemark:topResult];

[self.mapView addAnnotation:placemark];                   

}

                 }];

Reverse Geo-coding

Reverse geocoding is the process of converting a CLLocation into a CLPlacemark. Remember that the CLPlacemark contains the CLLocation, CLRegion, and an NSDictionary for the address.

CLGeocoder *geocoder = [[CLGeocoder alloc] init];

[geocoder reverseGeocodeLocation:userLocation completionHandler:^(NSArray *placemarks, NSError *error) {

 if(placemarks.count){

      NSDictionary *addressDict= [[placemarks objectAtIndex:0] addressDictionary];

    }

  }];

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Reference 3