iOS Programming Cookbook

How to do it...

1. Create a new Xcode project with the Single View Application template and name it NetworkingDemo.

2. Let's add a button at the center of the screen so that when a user clicks on it, we will trigger a server connection to fetch some data.
3. Open Main.storyboard and add a button at the center, with the title Connect:

4. Link an IBOutlet and IBAction to the button, as follows:

      @IBOutlet weak var connectButton: UIButton!       @IBAction func didClickOnConnectButton(_ sender: Any) {       }

5. Now, create a new Swift file for a new class called ContactsManager. This class will be responsible for fetching contacts information from a server.