Xcode 15 allows you to preview your iOS app's user interface as you build it. Here's how to use it to see how your app appears to users.

Apple's Swift has far-reaching effects on all platforms, not just iOS, OS X, watchOS and tvOS. Learn why Swift matters, how to use the programming language and how it differs from Objective-C.

Swift Playgrounds is an easy way to learn Swift programming and to test code inside of Xcode, and now the feature is available for iOS 10. Learn how to use the Swift Playgrounds app for iPad.