The included Xcode project does not compile. The errors are due to missing class definitions in Utilities/GCDMulticastDelegate.m:SupportsWeakReferences
git blame shows these were added recently(a couple of days ago). So I guess they weren't tested for iOS?
The classes in questions are:
NSATSTypesetter, NSColorSpace, NSFont, NSFontManager, NSFontPanel, NSImage, NSMenuView,
NSParagraphStyle, NSSimpleHorizontalTypesetter, NSTableCellView, NSTextView, NSViewController,
NSWindow, and NSWindowController.
I think that entire block should be ifdefed out when building for iOS, but I may be wrong.
Bug fix for issue #56 - compiler issues under iOS