Creating our location data manager

Let's create the LocationDataManager file:

1. Right-click on the Model folder in the Location folder and select New File.
2. Under Choose a template for your new file, select iOS at the top, and then Swift File. Then, hit Next.
3. Name this file LocationDataManager, and then hit Create.
4. We need to define our class definition now, so add the following under the import statement:

class LocationDataManager {
}

5. Inside the class declaration, add the following variable to keep our array private, as there is no reason to have to access this outside the class:

private var locations:[String] = []

6. Now, let's add the following methods after our variable:

init() {
    fetch()
}

func fetch() {
    for location in loadData() {
        if let city = location["city"] as? String,
            let state = location["state"] as? String {
    ...