ASIHttpRequest "_UTTypeCopyPreferredTagWithClass", referenced from:

错误代码：

Undefined symbols for architecture x86_64:

  "_SCDynamicStoreCopyProxies", referenced from:

      -[ASIHTTPRequest configureProxies] in ASIHTTPRequest.o

  "_deflate", referenced from:

      -[ASIDataCompressor compressBytes:length:error:shouldFinish:] in ASIDataCompressor.o

  "_deflateEnd", referenced from:

      -[ASIDataCompressor closeStream] in ASIDataCompressor.o

  "_deflateInit2_", referenced from:

      -[ASIDataCompressor setupStream] in ASIDataCompressor.o

  "_inflate", referenced from:

      -[ASIDataDecompressor uncompressBytes:length:error:] in ASIDataDecompressor.o

  "_inflateEnd", referenced from:

      -[ASIDataDecompressor closeStream] in ASIDataDecompressor.o

  "_inflateInit2_", referenced from:

      -[ASIDataDecompressor setupStream] in ASIDataDecompressor.o

ld: symbol(s) not found for architecture x86_64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

解决方案，添加框架和动态库

IOS:

http://allseeing-i.com/ASIHTTPRequest/Setup-instructions

MacOS:

Using ASIHTTPRequest in a Mac OS X project
To use ASIHTTPRequest in a Mac project, you'll need to link against:

SystemConfiguration.framework 
libz (as above)
CoreServices.framework 
CFNetwork is part of the CoreServices framework on Mac OS X. 
Unless you are writing a console-based application, your application is probably already setup to link with CoreServices, but if not, simply add CoreServices.framework in the same way as described above.