i have problem, and i can't figure out why..
Undefined symbols for architecture x86_64: "_OBJC_CLASS_$_QButtonElement", referenced from: objc-class-ref in AppDelegate.o "_OBJC_CLASS_$_QEntryElement", referenced from: objc-class-ref in AppDelegate.o "_OBJC_CLASS_$_QRootElement", referenced from: objc-class-ref in AppDelegate.o "_OBJC_CLASS_$_QSection", referenced from: objc-class-ref in AppDelegate.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)