"_OBJC_CLASS_$_TBXML", referenced from:
objc-class-ref in ReadCatagry.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
将TBXML.h和TBXML.m文件必须从文件夹里拷贝出来与ReadCatagry.m放在同一目录