MKMapView: Instead of Annotation Pin, a custom view - ios

Question

I want to display an image in my MKMapView instead of little rock pin.
Can someone please put some helpful code here, or tell the way how to do it?
-(MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:
(id <MKAnnotation>)annotation {
MKPinAnnotationView *pinView = nil;
if(annotation != mapView.userLocation)
{
static NSString *defaultPinID = #"com.invasivecode.pin";
pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
if ( pinView == nil ) pinView = [[MKPinAnnotationView alloc]
initWithAnnotation:annotation reuseIdentifier:defaultPinID];
pinView.pinColor = MKPinAnnotationColorGreen;
pinView.canShowCallout = YES;
pinView.animatesDrop = YES;
pinView.image = [UIImage imageNamed:#"pinks.jpg"]; //as suggested by Squatch
}
else {
[mapView.userLocation setTitle:#"I am here"];
}
return pinView;
}
I am expecting my image pinks.jpg to be on the map, pinning the location instead of default pin view (rock pin shaped). But still I am getting the default image of the pin.

Answer 1

When you want to use your own image for an annotation view, you should create an MKAnnotationView instead of an MKPinAnnotationView.
MKPinAnnotationView is a subclass of MKAnnotationView so it has an image property but it generally overrides that and draws a pin image (that's what it's for).
So change the code to:
-(MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:(id <MKAnnotation>)annotation
{
MKAnnotationView *pinView = nil;
if(annotation != mapView.userLocation)
{
static NSString *defaultPinID = #"com.invasivecode.pin";
pinView = (MKAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
if ( pinView == nil )
pinView = [[MKAnnotationView alloc]
initWithAnnotation:annotation reuseIdentifier:defaultPinID];
//pinView.pinColor = MKPinAnnotationColorGreen;
pinView.canShowCallout = YES;
//pinView.animatesDrop = YES;
pinView.image = [UIImage imageNamed:#"pinks.jpg"]; //as suggested by Squatch
}
else {
[mapView.userLocation setTitle:#"I am here"];
}
return pinView;
}
Notice that animatesDrop is also commented out since that property only exists in MKPinAnnotationView.
If you still want your image annotations to drop, you'll have to do the animation yourself. You can search Stack Overflow for "animatesdrop mkannotationview" and you'll find several answers. Here are the first two:
Is it possible to call animatesDrop in a MKAnnotationView rather than MKPinAnnotationView?
How can I create a custom "pin-drop" animation using MKAnnotationView?

Answer 2

Here's an answer on Swift 3. It dequeues annotation view if possible or creates a new one if not:
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
// Don't want to show a custom image if the annotation is the user's location.
guard !(annotation is MKUserLocation) else {
return nil
}
// Better to make this class property
let annotationIdentifier = "AnnotationIdentifier"
var annotationView: MKAnnotationView?
if let dequeuedAnnotationView = mapView.dequeueReusableAnnotationView(withIdentifier: annotationIdentifier) {
annotationView = dequeuedAnnotationView
annotationView?.annotation = annotation
}
else {
annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: annotationIdentifier)
annotationView?.rightCalloutAccessoryView = UIButton(type: .detailDisclosure)
}
if let annotationView = annotationView {
// Configure your annotation view here
annotationView.canShowCallout = true
annotationView.image = UIImage(named: "yourImage")
}
return annotationView
}
Swift 2.2:
func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
// Don't want to show a custom image if the annotation is the user's location.
guard !annotation.isKindOfClass(MKUserLocation) else {
return nil
}
// Better to make this class property
let annotationIdentifier = "AnnotationIdentifier"
var annotationView: MKAnnotationView?
if let dequeuedAnnotationView = mapView.dequeueReusableAnnotationViewWithIdentifier(annotationIdentifier) {
annotationView = dequeuedAnnotationView
annotationView?.annotation = annotation
}
else {
let av = MKAnnotationView(annotation: annotation, reuseIdentifier: annotationIdentifier)
av.rightCalloutAccessoryView = UIButton(type: .DetailDisclosure)
annotationView = av
}
if let annotationView = annotationView {
// Configure your annotation view here
annotationView.canShowCallout = true
annotationView.image = UIImage(named: "yourImage")
}
return annotationView
}

Answer 3

I agree with with answer of the Anna and i like to show how will look that in swift3.This answer it's with many other options.Like a resize the image, get a list of images from array and ect.
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
if let annotation = annotation as? PetrolStation {
let identifier = "pinAnnotation"
var view: MKAnnotationView
if let dequeuedView = mapView.dequeueReusableAnnotationView(withIdentifier: identifier)
as? MKPinAnnotationView { // 2
dequeuedView.annotation = annotation
view = dequeuedView
} else {
// 3
view = MKAnnotationView(annotation: annotation, reuseIdentifier: identifier)
view.canShowCallout = true
//here We put a coordinates where we like to show bubble with text information up on the pin image
view.calloutOffset = CGPoint(x: -7, y: 7)
//Here this is a array of images
let pinImage = PetrolItem[activePlace].imgPetrol?[activePlace]
//Here we set the resize of the image
let size = CGSize(width: 30, height: 30)
UIGraphicsBeginImageContext(size)
pinImage?.draw(in: CGRect(x: 0, y: 0, width: size.width, height: size.height))
let resizeImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
view.image = resizeImage
//Here we like to put into bubble window a singe for detail Informations
view.rightCalloutAccessoryView = UIButton(type: .detailDisclosure) as UIView
//Here we make change of standard pin image with our image
view.image = resizeImage
}
return view
}
return nil
}