Go to/zoom to current location function (MapKit)

Question

I've got a mapView which zooms to the current location using viewDidLoad :

#define METERS_PER_MILE 1609.344

// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
    [super viewDidLoad];

    mapView.showsUserLocation=TRUE;

    // zoom to  a specific area
    CLLocationCoordinate2D zoomLocation;
    zoomLocation.latitude = -28.994167;
    zoomLocation.longitude = 134.866944;

    MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(zoomLocation, 1900*METERS_PER_MILE, 1900*METERS_PER_MILE);
    MKCoordinateRegion adjustedRegion = [mapView regionThatFits:viewRegion];    

    // make sure the Google water mark is always visible
    mapView.autoresizingMask =
    (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);

    [mapView setRegion:adjustedRegion animated:YES];        

    mapView.delegate=self;

    searchBar.delegate = self;
}

This works fine. I've added a search bar and a function to jump to a specific address location. This works fine, too. I now want to add a button to jump back to the current location. Can you give me a hand, please?

Cheers

score 11 · Accepted Answer · edited Feb 19 '16 at 18:09

11

You need to set the center of your map to the current location on tap of that button. Say, like this:

- (IBAction)showCurrentLocation {        
    [mapView setCenterCoordinate:mapView.userLocation.location.coordinate animated:YES];
}

edited Feb 19 '16 at 18:09

Johannes Rudolph

35,298
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answered Aug 11 '11 at 06:35

Bushra Shahid

3,579
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37

is there a function called setCenter? – carbonr Mar 18 '12 at 18:40
12

[mapView setCenterCoordinate:mapView.userLocation.location.coordinate animated:YES]; – carbonr Mar 19 '12 at 11:04
@JohannesRudolph no worries! – carbonr Feb 19 '16 at 18:31

score 2 · Answer 2 · answered Feb 03 '13 at 10:55

2

you can also try:

mapView.userTrackingMode=YES;
mapView.userTrackingMode=NO;

answered Feb 03 '13 at 10:55

Jonathan Gurebo

285
1
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19

Just make sure to call this in the viewDidAppear method or later. – lehn0058 Feb 21 '13 at 15:40
1

`userTrackingMode` is not a `BOOL`. It's a `MKUserTrackingMode` enum. Only reason setting it to `YES`/`NO` "works" is because `YES` is equal to `MKUserTrackingModeFollow` and `NO` is equal to `MKUserTrackingModeNone`. But `userTrackingMode` can also be a third value `MKUserTrackingModeFollowWithHeading`. – Dec 03 '14 at 13:25

Philippe · Answer 3 · 2017-11-17T17:09:53.893

You can link this IBAction to your UIButton, it's going to move the map on the current location and zoom on it.

@IBOutlet weak var mapView: MKMapView!

@IBAction func zoomToUserCurrentLocation(sender: AnyObject) {
    if self.mapView != nil {
        self.mapView.setRegion(MKCoordinateRegionMake(
            self.mapView.userLocation.coordinate, 
            MKCoordinateSpanMake(0.1, 0.1)
        ), animated: true)
    }
}

MKCoordinateSpan defines the area spanned by a map region, smaller these values are, closer you zoom on the map.

score 0 · Answer 4 · answered Jul 27 '14 at 12:54

- (void)showCurrentLocation{

    MKMapPoint annotationPoint = MKMapPointForCoordinate(self.mapView.userLocation.coordinate);
    MKMapRect zoomRect = MKMapRectMake(annotationPoint.x, annotationPoint.y, 0.0, 0.0);
    [self.mapView setVisibleMapRect:zoomRect animated:YES];
}

score 0 · Answer 5 · answered Jul 21 '17 at 02:55

0

FOR SWIFT

Add this line in button action yourMKMapView.setUserTrackingMode(.follow, animated: true)

make sure you add yourMKMapView.showsUserLocation = true in viewDidLoad()

answered Jul 21 '17 at 02:55

Nithin Yell

23
3

Go to/zoom to current location function (MapKit)

5 Answers5