I'm trying to change to pin color on my map but I can't figure out how to do that using the class MKAnnotationView. I have seen a question here that is identical to this one but it hasn't been answered properly (i.e. the suggested answer does not work). Here's my code:
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
let identifier = "Placemark"
var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: identifier)
if annotationView == nil{
annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: identifier)
annotationView?.canShowCallout = true
annotationView?.pinTintColor = .green // throws an error (Value of type 'MKAnnotationView' has no member 'pinTintColor') !!
annotationView?.leftCalloutAccessoryView = UIButton(type: .detailDisclosure)
}else{
annotationView?.annotation = annotation
}
return annotationView
}
what am I doing wrong, and how do I fix it?
Could be that your annotationView is inferred to be a MKAnnotationView and not a MKPinAnnotationView. You could try like this instead.
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
let identifier = "Placemark"
var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: identifier)
if annotationView == nil{
let newAnnotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: identifier)
newAnnotationView.canShowCallout = true
newAnnotationView.pinTintColor = .green
newAnnotationView.leftCalloutAccessoryView = UIButton(type: .detailDisclosure)
return newAnnotationView
} else {
annotationView?.annotation = annotation
}
return annotationView
}
Related
When MKMarkerAnnotationView is used for annotation, the title is shown under the icon, how to do it in MKAnnotationView?
Example:
title show in under icon:
annotationView = MKMarkerAnnotationView(annotation: nil, reuseIdentifier: identifier)
title not show in under icon:
annotationView = MKAnnotationView(annotation: nil, reuseIdentifier: identifier)
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
guard annotation is MKPointAnnotation else { return nil }
let identifier = "Annotation"
var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: identifier)
if annotationView == nil {
annotationView = MKMarkerAnnotationView(annotation: nil, reuseIdentifier: identifier)
annotationView!.isEnabled = true
annotationView!.canShowCallout = true
annotationView!.annotation = annotation
annotationView!.displayPriority = .required
} else {
annotationView!.annotation = annotation
}
I created a property list for location details, title, subtitle ,type and coordinates. What I am trying to do is change the annotationView color according to the type of the location.In my code the compiler move directly to else statement. Could someone explain how can I solve this?
func readRecordFromPlist(){
//read record from plist code
}
func mapView(_ MapView: MKMapView, viewFor annotation: MKAnnotation) ->
MKAnnotationView? {
let obj = userNSObj()
if obj.type == "Type1" {
let view = MKMarkerAnnotationView(annotation: annotation, reuseIdentifier: "pin")
view.markerTintColor = .blue
return view
}else{
let view = MKMarkerAnnotationView(annotation: annotation, reuseIdentifier: "pin")
view.markerTintColor = .purple
return view
}
}
I would like to trigger a NavigationLink through a tap on a Annotation in Mapkit. I am able to set a bool, that a certain annotation was tapped, but i never was able to call a SwiftUI View through it.
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
guard !(annotation is MKUserLocation) else {
return nil
}
let identifier = "Annotation"
var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: identifier)
if annotationView == nil {
annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: identifier)
annotationView?.canShowCallout = true
annotationView?.rightCalloutAccessoryView = UIButton(type: .detailDisclosure)
} else {
annotationView?.annotation = annotation
}
return annotationView
}
func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
let selectedAssistance = self.parent.assistances.first {
$0.location.location?.coordinate == view.annotation?.coordinate
}
guard selectedAssistance != nil else {
return
}
self.parent.selectedAssistance = selectedAssistance?.serverId ?? ""
self.parent.presentSheet = true
}
I made it, by calling my own MapView in a ZStack, and placed a NavLink behind it, which is active on a Binding
I would like to add a pin on the Map with an image on a gesture.
Actually the add pin on gesture feature works great but without the image because it has to be a MKAnnotationView and not just MKAnnotation.
So I got weird warnings that I'm unable to fix:
override func viewDidLoad() {
super.viewDidLoad()
let annotation = MKPointAnnotation()
annotation.title = location.title
annotation.coordinate = CLLocationCoordinate2D(latitude: location.latitude, longitude: location.longitude)
mapView.addAnnotation(annotation)
}
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
if annotation is MKUserLocation { return nil }
let identifier = "CustomAnnotation"
var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: identifier)
if annotationView == nil {
annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: identifier)
annotationView!.canShowCallout = false
annotationView?.backgroundColor = UIColor.clear
annotationView!.image = UIImage(named: "map-pinpoint.png")!
} else {
annotationView!.annotation = annotation
}
return annotationView
}
Maybe the errors are because MKPinAnnotationView always use a pin image, so you can't be override. You should use MKAnnotationView instead.
I'm trying to add a custom image for my pin annotations as well as change the colour of the custom images for some of the annotations. The colour is changed. However, the image doesn't show up. The default pins show instead.
Here's my code:
class MyPointAnnotation : MKPointAnnotation {
var pinTintColor: UIColor?
}
class ViewController: UIViewController, CLLocationManagerDelegate, MKMapViewDelegate{
#IBOutlet weak var map: MKMapView!
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: "myAnnotation") as? MKPinAnnotationView
if annotationView == nil {
annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: "myAnnotation")
annotationView?.canShowCallout = true
} else {
annotationView?.annotation = annotation
}
if annotation is MKUserLocation {
return nil
}
if let annotation = annotation as? MyPointAnnotation {
annotationView?.pinTintColor = annotation.pinTintColor
annotationView?.image = UIImage(named: "BLog.png")
}
return annotationView
}
override func viewDidLoad() {
super.viewDidLoad()
self.map.delegate = self
let annotation1 = MyPointAnnotation()
annotation1.coordinate = CLLocationCoordinate2DMake([LatArray], [LonArray])
annotation1.title = NameArray
annotation1.pinTintColor = .red
let annotation2 = MyPointAnnotation()
annotation2.coordinate = CLLocationCoordinate2DMake([LatArray2], [LonArray2])
annotation2.title = NameArray2
annotation2.pinTintColor = .green
}
}
The image "BLog.png" is located in the main bundle.
I've assigned the MKMapView as a delegate.
But the image still won't change.
You need to use MKAnnotationView instead of MKPinAnnotationView to add a custom image for your pin annotations.
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
if annotation is MKUserLocation {
return nil
}
if // Image pin // {
var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: "image")
if annotationView == nil {
annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: "image")
annotationView?.canShowCallout = true
annotationView?.image = UIImage(named: "BLog.png")
let rightButton: AnyObject! = UIButton(type: UIButtonType.detailDisclosure)
annotationView?.rightCalloutAccessoryView = rightButton as? UIView
}
else {
annotationView?.annotation = annotation
}
return annotationView
} else {
var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: "myAnnotation") as? MKPinAnnotationView
if annotationView == nil {
annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: "myAnnotation")
annotationView?.canShowCallout = true
} else {
annotationView?.annotation = annotation
}
if let annotation = annotation as? MyPointAnnotation {
annotationView?.pinTintColor = annotation.pinTintColor
}
return annotationView
}
}