Drop pin at current user location iphone mkmapview

Question

Ok, here's my attempt at using CLLoactionManager

- (void)viewDidLoad {

    [super viewDidLoad];
    mapView=[[MKMapView alloc] initWithFrame:self.view.frame];
    //mapView.showsUserLocation=TRUE;
    mapView.delegate=self;
    [self.view insertSubview:mapView atIndex:0];


    CLLocationManager *locationManager=[[CLLocationManager alloc] init];
    locationManager.delegate=self;
    locationManager.desiredAccuracy=kCLLocationAccuracyNearestTenMeters;

    [locationManager startUpdatingLocation];
}

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {

    mStoreLocationButton.hidden=FALSE;
    location=newLocation.coordinate;
    //One location is obtained.. just zoom to that location

    MKCoordinateRegion region;
    region.center=location;
    MKCoordinateSpan span;
    span.latitudeDelta=0.01;
    span.longitudeDelta=0.01;
    region.span=span;

    [mapView setRegion:region animated:TRUE];    
}

My problem is that [locationManager startUpdatingLocation]; doesn't seem to fire the next method. What am I missing? I've tried setting breakpoints in the second method, but they never catch. Obviously it's not being used.

If you don't want a pin, then you can just use [yourMapView setShowsUserLocation:YES]; — RileyE, Jul 24 '12 at 15:01

score 3 · Accepted Answer · answered Jul 24 '12 at 08:01

3

You should look into using a CLLocationManager to get the current location to feed your MKMapView with the correct coordinates.

CLLocationManager *locationManager = [[CLLocationManager alloc] init];
MKMapView *map = [[MKMapView alloc] init];

[locationManager startUpdatingLocation];

CLLocationCoordinate2D _coordinate = locationManager.location.coordinate;
MKCoordinateRegion extentsRegion = MKCoordinateRegionMakeWithDistance(_coordinate, 800, 800); 

[map setRegion:extentsRegion animated:YES];

answered Jul 24 '12 at 08:01

radesix

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Do I need to create a new class to implement this? Or will this go in my above code? – Coltrane Jul 25 '12 at 03:46
This code is just the .m implementation. Obviously you would need the header files as well. I'll work up a more thorough example and post it within the next day or so. – radesix Jul 25 '12 at 20:12

score 0 · Answer 2 · edited May 23 '17 at 10:29

0

This looks like a good place to start. In order to drop a pin, you need to know the coordinates. Using - (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation will help you get the user's location so that you can create an MKAnnotation and MKPinAnnotationViews. Its pretty straight forward once you get started.

edited May 23 '17 at 10:29

Community

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answered Jul 24 '12 at 04:35

RileyE

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I tried to follow along with the guide, but `initWithCoordinate:coordinate andTitle:_title andSubtitle:_title` is giving me an error that there is no @interface that declares this selector. – Coltrane Jul 25 '12 at 04:14
Ahh, yes.. I forgot the annotation code.. thank you for pointing this out. I'll include this in my revised example to be posted soon. – radesix Jul 25 '12 at 21:19

Drop pin at current user location iphone mkmapview

2 Answers2