Find CoreData's sqlite file location.

document_location.swift

/// http://stackoverflow.com/a/27461267/1837541
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    let paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
    print(paths[0])
    return true
}