После редактирования некоторого кода я получаю 4 ошибки сборки:
Undefined symbols for architecture i386:
"_OBJC_CLASS_$_Playlist", referenced from:
objc-class-ref in PlayerViewController.o
"_OBJC_CLASS_$_Song", referenced from:
objc-class-ref in PlayerViewController.o
"_currentIndex", referenced from:
-[PlayerViewController viewDidLoad] in PlayerViewController.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Любые советы, как это исправить?