New in Xcode 6.3 beta 3
Force Touch Support
● Xcode uses Force Touch trackpad for Macs that include it, and supports configuring Force Touch trackpad functionality in Xcode’s Interface Builder editor for NSButton and NSSegmentedControl. Adopting Force Touch in Interface Builder requires OS X Yosemite 10.10.3 (14D98g). (16140561, 16140600, 18660545)
Xcode Playground Enhancements
● Playgrounds can now be upgraded to the new format by selecting the Editor > Upgrade Playground... menu item. The rich comments and supporting source files features are only supported in Playgrounds created with Xcode 6.3 or later. (19938996)
● Playgrounds now expose their structure in the Project navigator. To show the Project navigator, select View > Navigators > Show Project Navigator. This allows you to use resources (e.g. images) from within your Playground: twist open the Playground to see the Resources folder and drag them in. (19115173)
● Playgrounds now let you provide auxiliary support source files, which are compiled into a module and automatically imported into your Playground. To use the new supporting source files feature, twist open the playground in the project navigator to see the new Sources folder, which has a single file named "SupportCode.swift" by default. Add code to that file, or create new source files in this folder, which will all be automatically compiled into a module and automatically imported into your playground. (19460887)
Previous betas of Xcode 6.3 brought support for Swift 1.2, an App Store and Test Flight Crash Logs Organizer, and more.
Developers can download the new beta of Xcode 6.3 from the link below.