symbol(s) not found for architecture armv7s (linker command failed with exit code 1)

Question

When I build in Xcode 5 for IOS7 I get this error:

Undefined symbols for architecture armv7s:
  "_OBJC_CLASS_$_CIFilter", referenced from:
      objc-class-ref in UIImage+Filter.o
  "_kCIInputImageKey", referenced from:
      -[UIImage(Filter) filterWithPreset:] in UIImage+Filter.o
  "_OBJC_CLASS_$_CIImage", referenced from:
      objc-class-ref in UIImage+Filter.o
  "_OBJC_CLASS_$_CIContext", referenced from:
      objc-class-ref in UIImage+Filter.o
ld: symbol(s) not found for architecture armv7s
clang: error: linker command failed with exit code 1 (use -v to see invocation)

I notice that the error goes away if I remove the UIImage+Filter.h/m file and UIImageView+Filter.h/m

Wow No I didn't, and this was the error...How did you understand??? — Alessandro, Jan 02 '14 at 17:05
@Alessandro `CI` prefix on classes... or just google... it's pretty trivial. — , Jan 02 '14 at 17:06
possible duplicate of [Inline function "undefined symbols" error](http://stackoverflow.com/questions/10243018/inline-function-undefined-symbols-error) — Paresh Navadiya, Mar 07 '14 at 16:45

score 9 · Accepted Answer · answered Jun 17 '15 at 20:13

9

Easy... Make sure you import CoreImage framework

answered Jun 17 '15 at 20:13

Alessandro

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symbol(s) not found for architecture armv7s (linker command failed with exit code 1)

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