How To make Map Pins Animate drop? Swift 2.2 IOS 9 - swift

Question

I have a basic setup here of a map in my view, I'm trying to make the pins animate a drop...Just like when you press & hold in the maps app and the pin drops to the location. So when I get in the view all the pins will animate a drop to their location and I really dont know how to do that . If anyone can guide me to the correct code I need to add that will be great!
Here is the Current Code I have :
class FirstViewController: UIViewController,MKMapViewDelegate, CLLocationManagerDelegate{
#IBOutlet weak var mapView: MKMapView!
let locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
self.locationManager.delegate = self
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest
self.locationManager.requestWhenInUseAuthorization()
self.locationManager.startUpdatingLocation()
self.mapView.showsUserLocation = true
let LitzmanLocation = CLLocationCoordinate2DMake(32.100668,34.775192)
// Drop a pin
let Litzman = MKPointAnnotation()
Litzman.coordinate = LitzmanLocation
Litzman.title = "Litzman Bar"
Litzman.subtitle = "Nemal Tel Aviv St'"
mapView.addAnnotation(Litzman)}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
//Dispose of resources that can be re created.
}
//Mark:
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
{
let location = locations.last
let center = CLLocationCoordinate2D(latitude: location!.coordinate.latitude, longitude: location!.coordinate.longitude)
let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.1, longitudeDelta: 0.1))
self.mapView.setRegion(region, animated: true)
self.locationManager.stopUpdatingLocation()
}
func locationManager(manager: CLLocationManager, didFailWithError error: NSError)
{
print("Errors: " + error.localizedDescription)
}

Answer 1

Before all I am not maintaining any standards and I just have one of the solution for your problem and I am learning swift and mapKit by solving others problems.
Here I have given some sample code and I have added mapView and UITapGestureRecognizer through the Object library.
For adding annotation like dropping from top
pinView!.animatesDrop = true
in the viewForAnnotation delegation method.And addAnnotation method will call to add the annotation when you tap on the map.
For animating all the annotation
I have implemented regionDidChangeAnimated delegate method and just remove and add again all the annotations.
import UIKit
import MapKit
import CoreLocation
class MapViewController: UIViewController, MKMapViewDelegate, CLLocationManagerDelegate {
#IBOutlet weak var mapView: MKMapView!
let locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
print("viewDidLoad")
self.mapView.delegate = self
self.locationManager.delegate = self
self.locationManager.requestWhenInUseAuthorization()
self.locationManager.startUpdatingLocation()
self.mapView.showsUserLocation = true
let locationData = [
//Walker Art Gallery
["name": "Walker Art Gallery",
"latitude": 12,
"longitude": 79],
//Liver Buildings
["name": "Liver Buildings",
"latitude": 13,
"longitude": 77],
//St George's Hall
["name": "St George's Hall",
"latitude": 14,
"longitude": 77]
]
var annotations = [MKPointAnnotation]()
for each in locationData {
let latitude = CLLocationDegrees(each["latitude"] as! Double)
let longitude = CLLocationDegrees(each["longitude"] as! Double)
let coordinate = CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
let name = each["name"] as! String
let annotation = MKPointAnnotation()
annotation.coordinate = coordinate
annotation.title = "\(name)"
annotations.append(annotation)
}
mapView.addAnnotations(annotations)
}
func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
print("viewForAnnotation \(annotation.title)")
if annotation is MKUserLocation {
return nil
}
let reuseID = "pin"
var pinView = mapView.dequeueReusableAnnotationViewWithIdentifier(reuseID) as? MKPinAnnotationView
if(pinView == nil) {
pinView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: reuseID)
pinView!.canShowCallout = true
pinView!.animatesDrop = true
}
return pinView
}
#IBAction func addAnnotation(sender: UITapGestureRecognizer) {
if sender.state == .Ended {
let location = sender.locationInView(mapView)
let coordinate = mapView.convertPoint(location,toCoordinateFromView: mapView)
let annotation = MKPointAnnotation()
annotation.coordinate = coordinate
mapView.addAnnotation(annotation)
}
}
func mapView(mapView: MKMapView, regionDidChangeAnimated animated: Bool) {
print("regionDidChangeAnimated")
let annotations = self.mapView.annotations
self.mapView.removeAnnotations(annotations)
self.mapView.addAnnotations(annotations)
}
}
EDIT
For your case in the viewDidLoad method add this
self.mapView.delegate = self
For annotating the MKAnnotation you have to implement the below delegate method
//Annotation view
func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
if annotation is MKUserLocation {
return nil
}
let reuseID = "pin"
var pinView = mapView.dequeueReusableAnnotationViewWithIdentifier(reuseID) as? MKPinAnnotationView
if(pinView == nil) {
pinView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: reuseID)
pinView!.canShowCallout = true
pinView!.animatesDrop = true
}
return pinView
}
After for annotating all the annotation you have to implement below delegate method.
func mapView(mapView: MKMapView, regionDidChangeAnimated animated: Bool) {
let annotations = self.mapView.annotations
self.mapView.removeAnnotations(annotations)
self.mapView.addAnnotations(annotations)
}
And I am assuming you know how to add annotation on map tap...
EDIT2
Here is what you need my friend.
In the viewDidLoad add one notification observer as follows.
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(didBecomeActive), name: UIApplicationDidBecomeActiveNotification, object: nil)
And lastly change that regionDidChangeAnimated to didBecomeActive as below
func didBecomeActive() {
let annotations = self.mapView.annotations
self.mapView.removeAnnotations(annotations)
self.mapView.addAnnotations(annotations)
}

Answer 2

In Objective C:
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
if ([annotation isKindOfClass:[MKUserLocation class]])
return nil;
// Handle any custom annotations.
if ([annotation isKindOfClass:[MKPointAnnotation class]])
{
// Try to dequeue an existing pin view first.
MKPinAnnotationView *pinView = (MKPinAnnotationView*)[mapView dequeueReusableAnnotationViewWithIdentifier:#"CustomPinAnnotationView"];
if (!pinView)
{
// If an existing pin view was not available, create one.
pinView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:#"CustomPinAnnotationView"];
pinView.canShowCallout = YES;
pinView.animatesDrop = YES;
pinView.pinTintColor = [UIColor blueColor];
} else {
pinView.annotation = annotation;
}
return pinView;
}
return nil;
}