In this chapter, you learned how to download and install Xcode on your Mac. You familiarized yourself with the different parts of the Xcode user interface. You created your first iOS app, selected a Simulator, and built and ran the app. You learned what the Generic iOS Device menu item is for. You also learned how to connect an iOS device to Xcode via USB so that you can run the app on it, how to add an Apple ID to Xcode so the necessary digital certificates can be created and installed on your device, and how to trust the certificate on your device. Finally, you learned how to connect to your device over Wi-Fi, so you no longer need to plug and unplug your device every time you want to run an app.

You now know how to download and install Xcode from the App Store, the different panels in Xcode, how to add Developer credentials, and how to connect an iOS device for development using USB and Wi-Fi.

In the next chapter, we'll start exploring the Swift language using Swift Playgrounds, and learn how simple values and types are implemented in Swift.