Reference to 'X' is ambiguous

Question

After several changes to my project I suddenly get this build error:

Reference to \'kCGImageAlphaPremultipliedLast\' is ambiguous

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Answer 1

Ok after creating a new Project and coping everything to this project the build was successful however i got this "Malformed or corrupted AST file" error several times again but it can be solved by:

• Clean the project
• Deleting everything inside '~/Library/Developer/Xcode/DerivedData/ModuleCache/' (the button inside the organizer window did not work for me)
• Clean once more
• Build project

after that it works just fine except that i have to do this fix from time to time

i also did a diff to the old project and it seems a lot of frameworks and other old stuff got stuck in there from testing things so in case you have this check your project settings file for old stuff.

i thought that xcode and me can be friends one day. guess not...