MKMapView not updating user position image - iphone

My MKMapView shows my position at startup but then the image never 'follows' me. The location gets updated and the screen does follow me, but the original "User Location" image stays behind.
Here is some code snippets:
-(MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
static NSString* AnnotationIdentifier = #"Annotation";
MKPinAnnotationView *pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationIdentifier];
if(!pinView)
{
MKPinAnnotationView *customPinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationIdentifier] autorelease];
if(annotation == mapView.userLocation) customPinView.image = [self rotate:[UIImage imageNamed:#"myCar.png"] orientation:UIImageOrientationUp];
else customPinView.image = [UIImage imageNamed:#"randomPin.png"];
customPinView.animatesDrop = NO;
customPinView.canShowCallout = YES;
return customPinView;
}
else
{
pinView.annotation = annotation;
}
return pinView;
}
-(void)locationUpdate:(CLLocation *)location
{
CLLocationCoordinate2D loc = [location coordinate];
if(isFollowing)
[myMapView setCenterCoordinate:loc];//Works
}
and in my viewDidLoad I do call: [myMapView setShowsUserLocation:YES]; which does work.
So basically somewhere I neglect updating my position or its most possibly where I draw the new image for my current position.
Can anyone possibly see what I am missing or doing wrong there for it to not follow my location updates?
Thanks.

It's not clear if this is the issue but the viewForAnnotation method doesn't look right.
The annotation image is only being set when an annotation view is created. If a view is re-used, the annotation property is updated but not the image. It's possible that the re-used view is for an annotation of a different type requiring a different image.
The method should look something like this:
-(MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
static NSString* AnnotationIdentifier = #"Annotation";
MKPinAnnotationView *pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationIdentifier];
if (!pinView)
{
pinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationIdentifier] autorelease];
pinView.animatesDrop = NO;
pinView.canShowCallout = YES;
}
else
{
pinView.annotation = annotation;
}
if (annotation == mapView.userLocation)
pinView.image = [self rotate:[UIImage imageNamed:#"myCar.png"] orientation:UIImageOrientationUp];
else
pinView.image = [UIImage imageNamed:#"randomPin.png"];
return pinView;
}

Related

MKAnnotationView doesn't show custom pin

I'm implementing a custom pin for a map, the image is in te project's folder but didn't show.
Perhaps (and very likely) I'm doing something wrong.
The map displays and shows the pins (default red pins) but not the custom image nor the UIButtonTypeDetailDisclosure
This is the code I'm using:
- (MKAnnotationView *)mapView:(MKMapView *)theMapView viewForAnnotation:(id<MKAnnotation>)annotation
{
// in case it's the user location, we already have an annotation, so just return nil
if ([annotation isKindOfClass:[MKUserLocation class]])
{
return nil;
}
static NSString *TheAnnotationIdentifier = #"theAnnotationIdentifier";
MKAnnotationView *shoppeAnnotationView =
[self.mapView dequeueReusableAnnotationViewWithIdentifier:TheAnnotationIdentifier];
if (shoppeAnnotationView == nil)
{
MKAnnotationView *annotationView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:TheAnnotationIdentifier];
annotationView.canShowCallout = YES;
annotationView.image = [UIImage imageNamed:#"pin.png"];
annotationView.rightCalloutAccessoryView = [ UIButton buttonWithType:UIButtonTypeDetailDisclosure ];
annotationView.opaque = NO;
return annotationView;
}
return nil;
}
Any hints?
Thank you!

How do I change the pin color of an annotation in map kit view

I would like to know how to change the pin color of an annotation in map kit. Currently Im using the following code.
//King Solomon's Lodge No. 194
CLLocationCoordinate2D kingsolomons;
kingsolomons.latitude = 38.052041;
kingsolomons.longitude = -78.683218;
Annotation *kingsolomonslodge = [[Annotation alloc] init];
kingsolomonslodge.coordinate = kingsolomons;
kingsolomonslodge.title = #"King Solomon's Lodge No. 194";
kingsolomonslodge.subtitle = #"Charlottesville, VA";
[self.myMapView addAnnotation:kingsolomonslodge];
I have googled this question a few times but Im unsure on how to implement this into the current code that I have.
- (MKAnnotationView *)mapView:(MKMapView *)map viewForAnnotation:(id <MKAnnotation>)annotation
{
if (annotation == mapview.userLocation)
return nil;
MKPinAnnotationView *pin = (MKPinAnnotationView *) [mapview dequeueReusableAnnotationViewWithIdentifier: #"asdf"];
if (pin == nil)
pin = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier: #"asdf"] autorelease];
else
pin.annotation = annotation;
// NSLog(#"%#",annotation.title);
NSString *titlename=#"xyz";
if ([annotation.title isEqualToString:titlename]) {
pin.pinColor = MKPinAnnotationColorGreen;
// pin.image=[UIImage imageNamed:#"arrest.png"] ;
}
else{
pin.pinColor= MKPinAnnotationColorPurple;
}
pin.userInteractionEnabled = YES;
UIButton *disclosureButton = [UIButton buttonWithType:UIButtonTypeCustom];
// //pin.image=[UIImage imageNamed:#"arrest.png"] ;
pin.rightCalloutAccessoryView = disclosureButton;
//pin.pinColor = MKPinAnnotationColorRed;
pin.animatesDrop = YES;
[pin setEnabled:YES];
[pin setCanShowCallout:YES];
return pin;
}
You can use pinColor property if MKAnnotation class.
kingsolomonslodge.pinColor = MKPinAnnotationColorGreen;
Another way is you can use image instead of the default pin using viewForAnnotation: delegate:
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
static NSString *identifier = #"MyLocation";
if ([annotation isKindOfClass:[yourAnnotationLocation class]])
{
MKAnnotationView *annotationView = (MKAnnotationView *) [_mapView dequeueReusableAnnotationViewWithIdentifier:identifier];
if (annotationView == nil)
{
annotationView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
annotationView.enabled = YES;
annotationView.canShowCallout = YES;
annotationView.image = [UIImage imageNamed:#"yourImage.png"];//here we use a nice image instead of the default pins
annotationView.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
}
else
{
annotationView.annotation = annotation;
}
return annotationView;
}
return nil;
}
try this man...
kingsolomonslodge.pinColor = AnnotationColorRed;
let me know whether it is workihg or not
happy coding!!!!
If you want to apply custom color you can add image also.
MKAnnotationView *pinView = nil;
pinView.image = [UIImage imageNamed:#"pinks.jpg"];
Since iOS 9:
kingsolomonslodge.pinTintColor = UIColor.greenColor;

Customized User Location Annotation did not follow location update

I implemented MKMapViewDelegate method below and customized user location annotation was displayed. However, the annotation did not move when I walked around with the iPhone. When I removed this delegate method, default the blue dot user location annotation followed me.
Please tell me how to move customized user location annotation:
-(MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
static NSString* AnnotationIdentifier = #"Annotation";
MKPinAnnotationView *pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationIdentifier];
if (!pinView)
{
pinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationIdentifier] autorelease];
pinView.animatesDrop = NO;
pinView.canShowCallout = YES;
}
else
{
pinView.annotation = annotation;
}
pinView.image = [UIImage imageNamed:#"star.png"];
return pinView;
}

pin drop animation

The default pin drop animation doesn't work in my app, here is some code I wrote:
- (void)viewDidLoad {
/*
some code...
*/
[theMapView addAnnotation:addAnnotation];
[addAnnotation release];
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation{
MKPinAnnotationView *annoView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation
reuseIdentifier:#"current"];
annoView.animatesDrop = YES;
annoView.pinColor = MKPinAnnotationColorGreen;
return annoView;
}
Right now the pin just appear in the screen as default red one without any animation, the MKMapViewDelegate protocol has been adopted, anyone can see what's wrong here?
First use:
[yourMap_view setDelegate:self];
in ViewDidLoad
Then call this for the drop animation :
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
MKPinAnnotationView *pinView = nil;
if(annotation!= map_view.userLocation)
{
static NSString *defaultPin = #"pinIdentifier";
pinView = (MKPinAnnotationView*)[map_view dequeueReusableAnnotationViewWithIdentifier:defaultPin];
if(pinView == nil)
pinView = [[[MKPinAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:defaultPin]autorelease];
pinView.pinColor = MKPinAnnotationColorPurple; //Optional
pinView.canShowCallout = YES; // Optional
pinView.animatesDrop = YES;
}
else
{
[map_view.userLocation setTitle:#"You are Here!"];
}
return pinView;
}

iPhone Map: Distinguishing Users Location from Other Pins

I have a number of annotations on my map, in addition to the users current location. This works fine, except the default color for the users current location is the same as all of the other annotations. I'd like to make the pin green for the users current location so that it's uniquely identifiable from the other pins. How do I do this?
Bellow is the method I've been using (I can't find a way to determine which annotation is the users current location):
- (MKAnnotationView *)mapView:(MKMapView *)mapViewLocal viewForAnnotation:(id <MKAnnotation>)annotation {
static NSString *identifier = #"Pin";
MKPinAnnotationView *pinView = (MKPinAnnotationView*)[mapView dequeueReusableAnnotationViewWithIdentifier:identifier];
if (pinView == nil)
{
pinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier] autorelease];
pinView.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
pinView.animatesDrop = YES;
pinView.canShowCallout = YES;
}
else
{
pinView.annotation = annotation;
}
return pinView;
}
If you use standard MKUserLocation type for user location then you can check annotation's type if it is the same:
...
if ([annotation isKindOfClass:[MKUserLocation class]]){
// This is annotation for user location
}