Although Swift doesn't have header files as does Objective-C, Xcode 7 provides a "Generated Interface" feature that allows you to view a virtual header file for a class. This is convenient for viewing all the exposed properties and methods of a class.
To access this option, open a code file in Xcode, then in the Code Editor's jump bar, click the "Related Files" button (the button on the far left that contains four small squares) and then select
Generated Interface from the popup menu:

This generates a virtual header file containing all exposed properties and methods:

All the best!
Kevin McNeish
Author of
Learn to Code in Swift:
https://itunes.apple.com/us/book/learn-to-code-in-swift/id942956811?mt=11Check out our
Robot Tic-Tac-Toe app:
https://itunes.apple.com/us/app/robot-tic-tac-toe/id990638517?mt=8