Xcode 8

Xcode 8 includes Swift 3, and SDKs for iOS 10, watchOS 3, tvOS 10, and macOS Sierra.

Xcode

New in Xcode 8:

• Editor generates docs, highlights current line, supports color and image literals in .swift files, and completes image names
• App extensions enable third parties to add new capabilities to the source editor
• Code signing can be managed automatically or using custom settings
• Runtime issues show alerts to identify leaks, UI alignment problems, or race conditions using the thread sanitizer
• Memory debugger visualizes and navigates the map of relationships among your data and objects at runtime
• Interface Builder gives you pixel-perfect control and preview for each target device, and can edit at all zoom levels
• San Francisco Mono default coding font and new dark Civic theme
• Documentation viewer searches a unified reference library using fuzzy matching, available even when offline
• Accessibility improvements within Interface Builder and throughout the IDE
• Build Siri extensions, iMessage apps, and sticker packs for Messages in iOS 10

New in Swift 3:

• Swift-enhanced API for Grand Central Dispatch and Core Graphics
• Uniform API style across all of Swift 3, including frameworks in the platform SDKs
• Playgrounds support for open source toolchains from Swift.org
• Xcode migrators help move your existing Swift code to Swift 3
• Swift 2.3 aids the transition to Swift 3 while providing access to the latest SDKs