Unlike Objective-C where we are using #pragma mark for code organisation in the Jump Bar, in Xcode 6 using Swift we can use //MARK for the same purpose.
Here is an example:
#pragma mark –
#pragma mark Action
// MARK:- Action
Some other useful markers in Swift are: FIXME and TODO.
This becomes useful while setting reminder in the code.
The best scenarios where we can use this is to add a reminder when we need some part of the code to be added for the next version or if you are in a habit of adding comments while fixing bugs (from date to severity of the bug or version of the bug etc.)
These markers are available in the JumpBar from Xcode 6.
// TODO: This feature is part of next version.
// FIXME: bug version 1.0 (18 Spet 2014)