I am working with Xcode 6, and I\'m trying to recreate the code demoed during session 401 \"What\'s new in Xcode 6\". I\'ve added an image to Images.xcassets (called Sample)
This is what worked for me on Xcode Version 6.1.1.
Create Playground file under same directory as main storyboard.
Open Utilities pane for Playground file, and click the right arrow in Resource Path section to add your images in that directory.
Resource Path
Test image within Playground file.