Comparing Swift and Objective-C

About

Apple's new Swift programming language is designed to be interoperable with Objective-C, but what can it do that Objective-C can't? Find out in this course, as Simon Allardice explores the capabilities of each language, showing how and when they intersect–and also the places where the languages don't translate well. Discover how to migrate existing Objective-C projects to Swift and work with both languages in the same project. Then learn best practices for using Objective-C libraries and frameworks in new Swift code.

Topics include:

Exploring the interoperability of Swift and Objective-C
Comparing language syntax
Understanding how each language uses objects and methods
Bridging arrays, dictionaries, and numbers
Dealing with nil return types from Objective-C methods
Working with NSError in Swift
Working with Swift and Objective-C strings
Adding Swift to an existing Objective-C project
Inheriting between languages

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Frequently asked questions

How do I install the app?

Mount the image, drag the app into the "Applications" folder and launch it. If the system blocks the launch, allow it in "System Settings → Privacy & Security".

The app is damaged or won't launch

Reinstalling from a fresh image usually helps. Make sure your macOS version matches the one listed in the compatibility specs.

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Download the new version from the site and install it over the current one — your settings will be preserved.

The download link doesn't work

Try a mirror or a download manager. For large files the browser often drops the connection.

How do I completely remove the app?

Use an uninstaller utility — it cleans up the service files that remain after moving the app to the trash.