Trouble adding pin annotation to map
<p>I get the error EXC_BAD_INSTRUCTION for the last two lines of this function. </p>

<pre><code>@IBAction func makeEvent(sender: UIButton)
    {
        self.pointAnnotation1 = MKPointAnnotation()
        self.pointAnnotation1.title = "Event"
        self.pointAnnotation1.coordinate = CLLocationCoordinate2D(latitude: 38.986, longitude: -78.945)
        self.pinAnnotationView = MKPinAnnotationView(annotation: self.pointAnnotation, reuseIdentifier: nil)
        self.mapView?.centerCoordinate = self.pointAnnotation.coordinate
        self.mapView?.addAnnotation(self.pinAnnotationView.annotation!)
    }
</code></pre>