When I am running my project in Xcode 6, I am having many weird errors.
Parse Issue - Unknown type name 'NSString'
Format argument not an NSString
Could not build module Foundation
Could not build module QuartzCore
All of these errors occur in Apple's header files such as: CAMediaTiming.h, NSObjCRuntime.h,NSZone.h,NSObject.h, CALayer.h, etc.
Unfortunately, the answers in here: ios - Parse Issues in NSObjCRuntime, NSZone, and NSObject did not work for me.
How do you recommend I fix these errors?
The problem was that I had some .c files in my project, apparently Xcode 6 doesn't like .c files.
I changed the extension of the .c files to .m and Xcode 6 is happy again!