ld: warning: directory not found for option '-L-LC6'
Undefined symbols for architecture x86_64:
"_OBJCMETACLASS$_LBXScanViewController", referenced from:
_OBJCMETACLASS$_ScanViewController in ScanViewController.o
"_OBJCCLASS$_LBXScanViewController", referenced from:
_OBJCCLASS$_ScanViewController in ScanViewController.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
ld: warning: directory not found for option '-L-LC6' Undefined symbols for architecture x86_64: "_OBJCMETACLASS$_LBXScanViewController", referenced from: _OBJCMETACLASS$_ScanViewController in ScanViewController.o "_OBJCCLASS$_LBXScanViewController", referenced from: _OBJCCLASS$_ScanViewController in ScanViewController.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)
这是什么问题？