I'm using map kit and showing user's location using "showsUserLocation"
I"m using following code to zoom to user's location, but not zooming. Its zooming to some location in Africa, though the user location on map is showing correct.
MKCoordinateRegion newRegion;
MKUserLocation* usrLocation = mapView.userLocation;
newRegion.center.latitude = usrLocation.location.coordinate.latitude;
newRegion.center.longitude = usrLocation.location.coordinate.longitude;
newRegion.span.latitudeDelta = 20.0;
newRegion.span.longitudeDelta = 28.0;
[self.mapView setRegion:newRegion animated:YES];
Why is user's location correctly showing and not zooming properly. Can some one correct me please?
mapView.userLocation is set to a location off the coast of Africa (0,0) when first instantiated. As a result, I do something like the following, which causes the zoom to occur when the annotation appears. Of course, this is just an example:
- (void)mapView:(MKMapView *)mv didAddAnnotationViews:(NSArray *)views {
for(MKAnnotationView *annotationView in views) {
if(annotationView.annotation == mv.userLocation) {
MKCoordinateRegion region;
MKCoordinateSpan span;
span.latitudeDelta=0.1;
span.longitudeDelta=0.1;
CLLocationCoordinate2D location=mv.userLocation.coordinate;
region.span=span;
region.center=location;
[mv setRegion:region animated:TRUE];
[mv regionThatFits:region];
}
}
}
you can try:
mapView.userTrackingMode=YES;
mapView.userTrackingMode=NO;
UserTrackingMode will zoom to user Location.
Have you verified that the location returned by mapView.userLocation isn't at 0, 0?
Related
I have one application that shows maps. I need to show current position of user and manage to do that with
[mapView setShowsLocation:YES];
But when I zoom In or zoom Out map it needs a lot of time to show me that blue pin again.
Is it normal or I need to put something else to keep that blue pin on screen all time???
Thanks.
[self setCurrentLocation:self._mapView.userLocation.location.coordinate withZoom:1.0];
self._mapView.showsUserLocation = YES;
- (void)setCurrentLocation:(CLLocationCoordinate2D)coord withZoom:(float)zoomLevel {
MKCoordinateRegion region = self._mapView.region;
region.span.latitudeDelta = self.defaultSpanLevel.latitudeDelta*zoomLevel;
region.span.longitudeDelta = self.defaultSpanLevel.longitudeDelta*zoomLevel;
region.center = coord;
[self._mapView setRegion:region animated:YES];
}
You can use this in view will appear Method
Then You can use mapview delegate methods....
region did change animated:YES { and set map's region here.... take
current user location as region centre.. }
This will solve your problem
}
I am new to iphone App development, I Need code Current Location of the user. I want show his Location in My App using map Kit. Please tell me how to do that?
You may refer the apple's document for this CLLocationmanager class reference
- (IBAction) showCurrentLocation{
MKCoordinateRegion region;
MKCoordinateSpan span;
span.latitudeDelta=0.007;
span.longitudeDelta=0.007;
CLLocationCoordinate2D location = [[[mapview userLocation] location] coordinate];
//NSLog(#"Location found from Map: %f %f",location.latitude,location.longitude);
region.span=span;
region.center=location;
[mapview setRegion:region animated:TRUE];
[mapview regionThatFits:region];
}
You need to tell the map view to show the user's location (it's not on by default). Add this to the viewDidLoad:
[mapView setShowsUserLocation:YES];
Note that in the simulator, the user location is always Cupertino, CA so you might not see it depending on the map's current center and zoom.
- (void)mapView:(MKMapView *)mv didAddAnnotationViews:(NSArray *)views {
for(MKAnnotationView *annotationView in views) {
if(annotationView.annotation == mv.userLocation) {
MKCoordinateRegion region;
MKCoordinateSpan span;
span.latitudeDelta=0.002;
span.longitudeDelta=0.002;
CLLocationCoordinate2D location=mv.userLocation.coordinate;
region.span=span;
region.center=location;
[mv setRegion:region animated:TRUE];
[mv regionThatFits:region];
}
}
Hello all. I have tried searching other posts and websites. In essence I want to duplicate the 'Current location' BUTTON.
Using the above code, I was able to zoom into the users current location. This however is not flawless, sometimes the GPS updates a little late or thinks I am somewhere else, zooms to that location but then the blue dot will shift somewhere off screen to where I really am.
I was wondering is there a way I can add a 'Button', exactly like maps on the iphone. It doesn't need to gain a new zoom etc, simply move to the new updated locaiton. My main source of code would be almost replica to here.
I appreciate any help.
Create a custom annotation with the same graphic. This object must implement MKAnnotationView, and you have to return the custom view for it in the method mapView:viewForAnnotation: of the MKMapViewDelegate. If you want the exact graphic, use the project UIKit-Artwork-Extractor to get it.
Save a reference to the annotation view, subscribe to core location updates, and update the position calling something like:
- (void) animateView:(UIView *)view toPosition:(NSValue*)value
{
CGPoint newCenter = [value CGPointValue];
[UIView animateWithDuration:0.5
animations:^{
view.center = newCenter;
}
completion:^(BOOL finished){ }];
}
Then set the center of the map on the annotation:
- (void)centerMap:(CLLocation *)location {
MKCoordinateRegion region = { { 0.0f, 0.0f }, { 0.0f, 0.0f } };
region.center = location.coordinate;
region.span.longitudeDelta = 0.15f;
region.span.latitudeDelta = 0.15f;
[self.mapView setRegion:region animated:YES];
}
I have a normal mapView, which can tell the users location, but when users location is located my map doesn't suddenly zoom in to the users location like Apples maps application.
Does anybody know how to implement this feature!
Implement the didUpdateUserLocation delegate method:
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
MKCoordinateRegion region;
region.center = userLocation.location.coordinate;
MKCoordinateSpan span = { 1.0, 1.0 };
region.span = span;
[mapView setRegion:region animated:YES];
}
Make sure your map view's delegate is set.
how can I zoom the map on my userLocation automatically in my app?
I have the following code to zomm in the map but i must zoom on the userLocation and the following code zooms always to africa?
MKCoordinateRegion zoomIn = mapView.region;
zoomIn.span.latitudeDelta *= 0.2;
zoomIn.span.longitudeDelta *= 0.2;
zoomIn.center.latitude = mapView.userLocation.location.coordinate.latitude;
zoomIn.center.longitude = mapView.userLocation.location.coordinate.longitude;
[mapView setRegion:zoomIn animated:YES];
OK i solved the problem, with the following delegate Method:
-(void)mapView:(MKMapView *)mv didAddAnnotationViews:(NSArray *)views{
for(MKAnnotationView *annotationView in views) {
if(annotationView.annotation == mv.userLocation){
MKCoordinateRegion region;
MKCoordinateSpan span;
span.latitudeDelta=0.9;
span.longitudeDelta=0.9;
CLLocationCoordinate2D location =mv.userLocation.coordinate;
location = mv.userLocation.location.coordinate;
region.span = span;
region.center = location;
[mv setRegion:region animated:TRUE];
[mv regionThatFits:region];
}
}
}
thanks alot mate, this helped me greatly. Really wanted to vote but cant because of my rep level.
I also found that using:
mapView.userLocation.location.coordinate.latitude;
always zoomed me to africa, and never centered me onto my current location.
But by using the delegate method:
-(void)mapView:(MKMapView *)myMapView didAddAnnotationViews:(NSArray *)views {
I was able to solve this successfully. What I discovered is that when using mapView.userLocation.location.coordinate.latitude; in the viewDidLoad method wasn't triggering the correct user coords on startup of the view, hence it was displaying the wrong coords.