Default location in map-kit in ios

Question

I am new to IOS i need to show default location with my latitude and longitude(12.940358, 80.208647). with annotation pin.

.h file:

#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>
#import <MapKit/MapKit.h>
@interface Map_view : UIViewController<MKMapViewDelegate,CLLocationManagerDelegate>{
    CLLocationManager *locationmgr;
    CLGeocoder *geocode;
    CLPlacemark *placemark;

}
@property(nonatomic,retain)IBOutlet MKMapView *map11;

.m file:

@synthesize map11;

I don't no where to put my latitude and longitude and how to use please help me.

score 0 · Answer 1 · answered May 05 '16 at 06:38

For centering on user location, you can use the following code:

[mapView setCenterCoordinate:mapView.userLocation.location.coordinate animated:YES];

For zooming on special locations, you should study how the regions (MKCoordinateRegion) are counted and work, count your latitude and longitude values for the region and display it using call:

[mapView setRegion:myRegion animated:YES];

score 0 · Answer 2 · 2016-05-05T06:47:57.267

0

use this code it will help you:

- (void)location
{
    _locationManger =[[CLLocationManager alloc]init];
    _locationManger.distanceFilter=kCLDistanceFilterNone;
    _locationManger.desiredAccuracy=kCLLocationAccuracyHundredMeters;
    [_locationManger startUpdatingLocation];

    [map11 setMapType:MKMapTypeStandard];
    [map11 setZoomEnabled:YES];
    [map11 setScrollEnabled:YES];

    MKCoordinateRegion region={ {0.0,0.0 },{0.0,0.0}};

    region.center.latitude = 12.940358 ;
    region.center.longitude = 80.208647;
    region.span.longitudeDelta = 20.20f;
    region.span.latitudeDelta = 20.20f;

    [map11 setRegion:region animated:YES];
    [map11 setDelegate:sender];

}

It will show your desired location as

edited May 05 '16 at 06:47

answered May 05 '16 at 06:42

above code showing error use of undeclared identifier "Sender".if i comment that line its showing usual map page @Abhinandan Pratap – A.sonu May 05 '16 at 07:08
comment that line and call it in ViewDidLoad as [self location]; – May 05 '16 at 07:17

score 0 · Answer 3 · edited May 05 '16 at 08:33

first You have to set DELEGATE and Import following in your .h file

    #import <MapKit/MapKit.h>
    #import <CoreLocation/CoreLocation.h>

after that make a property

@property(retain, nonatomic)  CLLocationManager *locationManager;

and in ViewDidLoad

mapview.delegate = self;

and then You can do like belew

- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
    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];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark - to get User Current Location.
- (void)getUserLocation{
    self.locationManager = [[CLLocationManager alloc] init];


    self.locationManager.delegate = self;


#ifdef __IPHONE_8_0
    if([self getDeviceOSVersion].integerValue >= 8) {
        // Use one or the other, not both. Depending on what you put in info.plist
        [self.locationManager requestWhenInUseAuthorization];
        [self.locationManager requestAlwaysAuthorization];
    }
#endif
    [self.locationManager startUpdatingLocation];
}
-(NSString *)getDeviceOSVersion{
    return [NSString stringWithFormat:@"%@",[UIDevice currentDevice].systemVersion];
}

#pragma mark - CLLocationManagerDelegate
-(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
    UIAlertController *errorAlert = [UIAlertController alertControllerWithTitle:@"ERROR" message:@"There was an error retrieving your location"preferredStyle:UIAlertControllerStyleAlert ];
    UIAlertAction* ok = [UIAlertAction
                         actionWithTitle:@"OK"
                         style:UIAlertActionStyleDefault
                         handler:^(UIAlertAction * action)
                         {
                             [errorAlert dismissViewControllerAnimated:YES completion:nil];

                         }];
    [errorAlert addAction:ok];
    [self presentViewController:errorAlert animated:YES completion:nil];
    NSLog(@"Error: %@",error.description);
}

-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations{
    CLLocation *currentLocation = [locations lastObject];
//currentLocation.coordinate.longitude =  currentLocation.coordinate.longitude ;
   // latitude =  currentLocation.coordinate.latitude;

      [self.locationManager stopUpdatingLocation];



}

score 0 · Answer 4 · answered May 05 '16 at 06:44

Try the following code :

CLLocationCoordinate2D zoomLocation;
zoomLocation.latitude = 39.281516;
zoomLocation.longitude= -76.580806;

// 2
MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(zoomLocation, 0.5*METERS_PER_MILE, 0.5*METERS_PER_MILE);

// 3
[_mapView setRegion:viewRegion animated:YES];

This code will set your region in your map.. Then follow the steps to add annotation in your map..

// Add an annotation
MKPointAnnotation *point = [[MKPointAnnotation alloc] init];
point.coordinate = userLocation.coordinate; // Change coordinate as yours
point.title = @"Where am I?";
point.subtitle = @"I'm here!!!";

[self.mapView addAnnotation:point];

Hope it helps..

score 0 · Answer 5 · answered May 05 '16 at 06:57

add this code in your viewdidload

//self.locationManager replace it with your locationmgr 
     self.locationManager = [[CLLocationManager alloc] init];
        self.locationManager.delegate = self;
    #ifdef __IPHONE_8_0
        if(IS_OS_8_OR_LATER) {
            // Use one or the other, not both. Depending on what you put in info.plist
            [self.locationManager requestWhenInUseAuthorization];
            [self.locationManager requestAlwaysAuthorization];
        }
    #endif
        [self.locationManager startUpdatingLocation];

        mapView.showsUserLocation = YES;
        [mapView setMapType:MKMapTypeStandard];
        [mapView setZoomEnabled:YES];
        [mapView setScrollEnabled:YES];

in viewdidappear add below code

-(void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:YES];

    self.locationManager.distanceFilter = kCLDistanceFilterNone;
    self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    [self.locationManager startUpdatingLocation];
    NSLog(@"%@", [self deviceLocation]);


    CLLocationCoordinate2D userLocation = CLLocationCoordinate2DMake( self.locationManager.location.coordinate.latitude, self.locationManager.location.coordinate.longitude);
    MKPointAnnotation *annotation = [[MKPointAnnotation alloc] init];
    [annotation setCoordinate:userLocation];
    [annotation setTitle:@"Your Location"];
    [self.mapView addAnnotation:annotation];

    //always show the name of annotation
    [self.mapView selectAnnotation:annotation animated:YES];

    //location 1
    CLLocationCoordinate2D loc1Coord = CLLocationCoordinate2DMake(18.998250, 72.848734);//add your latitude and longitude here
    MKPointAnnotation *annotation1 = [[MKPointAnnotation alloc] init];
    [annotation1 setCoordinate:loc1Coord];
    [annotation1 setTitle:@"title"];
    [annotation1 setSubtitle:@"subtitle"];
    [self.mapView addAnnotation:annotation1];

}

add this methods

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
    if ([annotation isKindOfClass:[MKUserLocation class]])
        return nil;

    MKAnnotationView *annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"loc"];
    annotationView.canShowCallout = YES;
    annotationView.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];

    return annotationView;
}

Thats it, you can see your latitude and longitude in the map.Let me know if it is working or not?

ya its working but not in zoomed and some error in if-else in viewdidload part for me @Madhu — A.sonu, May 05 '16 at 07:45
can u post your viewdidload code and show me where you are getting error. — Madhu, May 05 '16 at 07:49

score 0 · Accepted Answer · answered May 05 '16 at 07:17

If you want to show your location with your lat & long with Annotation With Name.

Use this code.

- (void)viewDidLoad {
    [super viewDidLoad];

    mapVW.showsUserLocation = YES;
    CLLocation *loc = [[CLLocation alloc]initWithLatitude:12.940358 longitude:80.208647];

    [mapVW setCenterCoordinate:loc.coordinate animated:YES];

    CLGeocoder *ceo = [[CLGeocoder alloc]init];
    [ceo reverseGeocodeLocation:loc
              completionHandler:^(NSArray *placemarks, NSError *error) {
                  CLPlacemark *placemark = [placemarks objectAtIndex:0];

                  //String to hold address
                 NSString *locatedAt = [[placemark.addressDictionary valueForKey:@"FormattedAddressLines"] componentsJoinedByString:@", "];
                 NSString *cityName = placemark.locality;

                  MKPointAnnotation *annotationPoint = [[MKPointAnnotation alloc] init];
                  annotationPoint.coordinate = CLLocationCoordinate2DMake(12.940358, 80.208647);
                  annotationPoint.title = locatedAt;

                  MKCoordinateRegion region;

                  MKCoordinateSpan span1;
                  span1.latitudeDelta =  0.08;
                  span1.longitudeDelta = 0.08;
                  region.span = span1;
                  region.center = annotationPoint.coordinate;
                  [mapVW setRegion:region animated:TRUE];
                  [mapVW regionThatFits:region];

                  [mapVW addAnnotation:annotationPoint];
                  [mapVW selectAnnotation:annotationPoint animated:NO];
              }
     ];

}

if two latitude and longitude means @Kuldeep – A.sonu May 05 '16 at 07:43 — A.sonu, May 05 '16 at 07:43

Default location in map-kit in ios

6 Answers6