compiler error in using Zbar SDK(library) in xcode 6

1 I got the following error while building my project.

Undefined symbols for architecture i386: "_OBJC_CLASS_$_ZBarCaptureReader", referenced from: objc-class-ref in ZBarViewController.o ld: symbol(s) not found for architecture i386 clang: error: linker command failed with exit code 1 (use -v to see invocation) .I have try all kinds of solution form google but unable to solve it . Help will be appreciated Thanks