Adding Pins to Map using MapKit - Swift 3.0 - ios

Question

New coder, trying to figure out how to use MapKit. The goal is to create a map that users can add pins to using their address. However, the step I am at now, I am having trouble figuring out how to add pins to the map at all.
How can I add a pin to the map? I have been struggling to figure out how to use annotations thus far.
That's what I'm hoping for help/direction with. Thanks!
import UIKit
import MapKit
import CoreLocation
class ViewController: UIViewController, MKMapViewDelegate, CLLocationManagerDelegate
{
#IBOutlet weak var bigMap: MKMapView!
let locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
self.locationManager.delegate = self
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest
self.locationManager.requestWhenInUseAuthorization()
self.locationManager.startUpdatingLocation()
self.bigMap.showsUserLocation = true
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
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: 0.02, longitudeDelta: 0.02))
self.bigMap.setRegion(region, animated: true)
self.locationManager.stopUpdatingLocation()
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print("Errors " + error.localizedDescription)
}
}

Answer 1

They're called annotations in the MapKit and you should instantiate them like so:
let annotation = MKPointAnnotation()
then in the viewDidLoad() method just set the coordinates and add them to the map like:
annotation.coordinate = CLLocationCoordinate2D(latitude: 11.12, longitude: 12.11)
mapView.addAnnotation(annotation)
The numbers are your coordinates

Answer 2

The way that I learned how to do this is:
In the same function as viewDidLoad(), place the following lines of code:
let annotation = MKPointAnnotation()
annotation.title = "Your text here"
//You can also add a subtitle that displays under the annotation such as
annotation.subtitle = "One day I'll go here..."
annotation.coordinate = center
This is the only place I can see where you have a coordinate
if all else fails, just add the coordinate (search on Google if you
need to know how to create a coordinate) and set it equal to the
"annotation.coordinate" variable
map.addAnnotation(annotation)
Dassit!