A simple script for creating a Swift UIImage extension that gives you type safe access to your Xcode Asset Catalog. Misen scans sub-directories in the specified Asset Catalog and creates a UIImage extension file that provides application specific enums which are constructed from the Asset Catalog image names, and a UIImage non-null returning initializer whose argument is one of the created enum values. You can run Misen independently from the command line or you could add it as a Run Script build phase in Xcode.