Add Pin Color to MKAnnotation - ios

Question

I have a button on Map which directs to "MyLocation" its hardcore lat n lng. i want to change the pin color. Tried some but not successful. Heres the code.
- (IBAction)btnMylLocation:(UIButton *)sender {
CLLocationCoordinate2D coord = {.latitude = 18.520430, .longitude = 73.856744};
MKCoordinateSpan span = {.latitudeDelta = 0.2, .longitudeDelta = 0.2};
MKCoordinateRegion region = {coord, span};
[self.mapView setRegion:region];
CLLocationCoordinate2D annotationCoord;
annotationCoord.latitude = 18.520430;
annotationCoord.longitude = 73.856744;
self.lblLongitude.text = [NSString stringWithFormat:#"%f ", annotationCoord.latitude];
self.lblLatitude.text = [NSString stringWithFormat:#" %f", annotationCoord.longitude];
MKPointAnnotation *annotationPoint = [[MKPointAnnotation alloc] init];
annotationPoint.coordinate = annotationCoord;
annotationPoint.title = #"Mindbowser";
annotationPoint.subtitle = #"Pune Headquater's";
[_mapView addAnnotation:annotationPoint];
}

Answer 1

You need to implement the map's delegate method and set the delegate.
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
// If it's the user location, just return nil.
if ([annotation isKindOfClass:[MKUserLocation class]])
return nil;
// Handle any custom annotations.
if ([annotation isKindOfClass:[MKPointAnnotation class]])
{
MKPinAnnotationView *pinView = (MKPinAnnotationView*)[mapView dequeueReusableAnnotationViewWithIdentifier:#"CustomPinAnnotationView"];
if (!pinView)
{
pinView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:#"CustomPinAnnotationView"];
pinView.canShowCallout = YES;
pinView.pinColor = MKPinAnnotationColorGreen;
}
else {
pinView.annotation = annotation;
}
return pinView;
}
return nil;
}
In your viewDidLoad() , write the following code
_mapView.delegate = self;

Answer 2

This may help you.
- (MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>) annotation
{
MKPinAnnotationView *annotationView = nil;
if(![annotation isKindOfClass:[MKUserLocation class]]){
annotationView=[[MKPinAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:#"pin"];
annotationView.pinColor = MKPinAnnotationColorGreen;
}
return annotationView;
}

Answer 3

Implement the delegate method below and return MKAnnotationView by assigning the pinTintColor it is available from iOS 9.
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
static NSString *annotaionIdentifier=#"annotationIdentifier";
MKPinAnnotationView *aView=(MKPinAnnotationView*)[mapView dequeueReusableAnnotationViewWithIdentifier:annotaionIdentifier ];
if (aView==nil) {
aView=[[MKPinAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:annotaionIdentifier];
aView.pinTintColor = [UIColor yellowColor];//from iOS 9, you can pass in any color you want.
//aView.pinColor = MKPinAnnotationColorPurple //if iOS is less than 9.0
aView.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
aView.animatesDrop=TRUE;
aView.canShowCallout = YES;
aView.calloutOffset = CGPointMake(-5, 5);
}
return aView;
}

Answer 4

To change color while adding annotation, check below method.
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation
(id<MKAnnotation>)annotation {
static NSString *identifier = #"PinAnnotationIdentifier";
MKPinAnnotationView *pinAnnotation = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:identifier];
if(!pinAnnotation) {
pinAnnotation = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
}
pinAnnotation.pinColor = MKPinAnnotationColorGreen; //Color
return pinAnnotation;
}
Use below method for changing color on select and deselect.
- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKPinAnnotationView *)view {
view.pinColor = MKPinAnnotationColorRed;
}
- (void)mapView:(MKMapView *)mapView didDeselectAnnotationView:(MKPinAnnotationView *)view {
view.pinColor = MKPinAnnotationColorGreen;
}