MapView doesn't work anymore if I add a GestureRecognizer

Question

I'm trying to add a Pin at my map when the user does a longPress (with UILongPressGestureRecognizer), but this doesn't work. However, the bigger problem is: The map isn't displayed anymore. Why the map has disappeared?

You find the project-file here

---------------------------ViewController.swift--------------------------------

{

import UIKit
import MapKit

class ViewController: UIViewController, MKMapViewDelegate {

@IBOutlet var theMapView: MKMapView!
@IBOutlet var theTextfield: UITextField!

@IBOutlet var theLabel: UILabel!

@IBAction func theButton(sender: UIButton) {
    theLabel.text = "Swift-App schreibt \(theTextfield.text)"
    theTextfield.resignFirstResponder()
}


override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    // Position
    var latitude:CLLocationDegrees = 48.399193
    var longitude:CLLocationDegrees = 9.993341
    // Zoomfaktor
    var latDelta:CLLocationDegrees = 0.01
    var longDelta:CLLocationDegrees = 0.01
    // 
    var theSpan:MKCoordinateSpan = MKCoordinateSpanMake(latDelta,longDelta)



    // Koordinaten der Kirche
    var churchLocation:CLLocationCoordinate2D = CLLocationCoordinate2DMake(latitude, longitude)
    // Zentrum und Kartenausschnitt
    var theRegion:MKCoordinateRegion = MKCoordinateRegionMake(churchLocation, theSpan)


    // LongTap definieren
    let longpress = UILongPressGestureRecognizer(target: theMapView, action: "actionPin:")
    longpress.minimumPressDuration = 1.0
    longpress.numberOfTouchesRequired = 1
    longpress.allowableMovement = 100
    theMapView.addGestureRecognizer(longpress)


    // Karte anzeigen
    theMapView.setRegion(theRegion,animated:false)

    // Pin setzen
    var theUlmMinsterAnnotation = MKPointAnnotation()
    theUlmMinsterAnnotation.coordinate = churchLocation
    theUlmMinsterAnnotation.title = "Ulmer Münster"
    theUlmMinsterAnnotation.subtitle = " Untertitel"

    theMapView.addAnnotation(theUlmMinsterAnnotation)
}

func actionPin(gestureRecognizer:UIGestureRecognizer) {
    var touchpoint = gestureRecognizer.locationInView(self.theMapView)
    var newCoord:CLLocationCoordinate2D=theMapView.convertPoint(touchpoint, toCoordinateFromView: self.theMapView)
    var newAnnotation = MKPointAnnotation()
    newAnnotation.coordinate = newCoord
    newAnnotation.title = "Fingertipp"
    newAnnotation.subtitle = "Untertitel"
    theMapView.addAnnotation(newAnnotation)
}

}}

Answer 1

Because your map size it's {0,0} and you are not using any constrain.

Check here the project with a minor update https://dl.dropboxusercontent.com/u/19438780/test1-v2.zip