[Swift - Custom MKAnnotationView, set label title](https://stackoverflow.com/questions/28074620/swift-custom-mkannotationview-set-label-title)

This link tells me how to create the custom annotation. I am new to IoS app. Trying to understand how to use this in the code.
I want to change the font in the call and have 2 lines instead of one. It appears this class can do all that, but I do not know how to use this in the view controller to change the font. Currently, this is what I have and have created the class as suggested in the link:

```
let annotation = MKPointAnnotation()
annotation.coordinate = coordinate               
annotation.title=title
self.map.addAnnotation(annotation)

```

How do I change this to use the custom class?

THanks

Ram