MKPointAnnotations touch event in swift

Several steps are necessary, here are some code snippets to get you started.

First you need a custom class for your pin annotation which holds the data you want to work with.

import MapKit
import Foundation
import UIKit

class PinAnnotation : NSObject, MKAnnotation {
    private var coord: CLLocationCoordinate2D = CLLocationCoordinate2D(latitude: 0, longitude: 0)
    private var _title: String = String("")
    private var _subtitle: String = String("")

    var coordinate: CLLocationCoordinate2D {
        get {
            return coord
        }
    }

    func setCoordinate(newCoordinate: CLLocationCoordinate2D) {
        self.coord = newCoordinate
    }   

     var title: String? {
        get {
            return _title
        }
        set (value) {
            self._title = value!
        }
    }

    var subtitle: String? {
        get {
            return _subtitle
        }
        set (value) {
            self._subtitle = value!
        }
    } 
}

Then you need a custom class for your MKMapView which conforms to the MKMapViewDelegate protocol. Implement the method viewForAnnotation there:

import MapKit
import CLLocation
import Foundation
import UIKit

class MapViewController: UIViewController, MKMapViewDelegate {

    ...

    func mapView(mapView: MKMapView!, viewForAnnotation annotation: MKAnnotation!) -> MKAnnotationView! {
        if annotation is PinAnnotation {
            let pinAnnotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: "myPin")

            pinAnnotationView.pinColor = .Purple
            pinAnnotationView.draggable = true
            pinAnnotationView.canShowCallout = true
            pinAnnotationView.animatesDrop = true

            let deleteButton = UIButton.buttonWithType(UIButtonType.Custom) as UIButton
            deleteButton.frame.size.width = 44
            deleteButton.frame.size.height = 44
            deleteButton.backgroundColor = UIColor.redColor()
            deleteButton.setImage(UIImage(named: "trash"), forState: .Normal)

            pinAnnotationView.leftCalloutAccessoryView = deleteButton

            return pinAnnotationView
        }

        return nil
    }

    func mapView(mapView: MKMapView!, annotationView view: MKAnnotationView!, calloutAccessoryControlTapped control: UIControl!) {
        if let annotation = view.annotation as? PinAnnotation {
            mapView.removeAnnotation(annotation)
        }
    }

That gives you something like this:

To add a new annotation to your map use this somewhere in your code:

let pinAnnotation = PinAnnotation()
pinAnnotation.setCoordinate(location)

mapView.addAnnotation(pinAnnotation)

Greate work !!! BUT.. I just copy past this and I had to add a few changes. I'll share with you guys those changes.

import MapKit
import Foundation
import UIKit

class PinAnnotation : NSObject, MKAnnotation {
private var coord: CLLocationCoordinate2D = CLLocationCoordinate2D(latitude: 0, longitude: 0)
private var _title: String = String("")
private var _subtitle: String = String("")

var title: String? {
    get {
        return _title
    }
    set (value) {
        self._title = value!
    }
}

var subtitle: String? {
    get {
        return _subtitle
    }
    set (value) {
        self._subtitle = value!
    }
}

var coordinate: CLLocationCoordinate2D {
    get {
        return coord
    }
}

func setCoordinate(newCoordinate: CLLocationCoordinate2D) {
    self.coord = newCoordinate
}
}

I hope it will help :D