"_inflateEnd", referenced from "_inflateInit_"等。这时需要在工程中加入libz.dlib 文件-优快云博客

本文介绍了解决iOS应用中出现的压缩和解压缩符号未定义的问题，通过添加libz.dylib库可以轻松解决此类错误。

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Undefined symbols for architecture i386:
  "_compressBound", referenced from:
      +[NSDataGZipAdditions compressedDataWithBytes:length:] in NSDataGZipAdditions.o
  "_compress", referenced from:
      +[NSDataGZipAdditions compressedDataWithBytes:length:] in NSDataGZipAdditions.o
  "_inflateInit_", referenced from:
      +[NSDataGZipAdditions dataWithCompressedBytes:length:] in NSDataGZipAdditions.o
  "_inflate", referenced from:
      +[NSDataGZipAdditions dataWithCompressedBytes:length:] in NSDataGZipAdditions.o
      -[ParserForMainReturn uncompressZippedData:] in ParserForMainReturn.o
  "_inflateEnd", referenced from:
      +[NSDataGZipAdditions dataWithCompressedBytes:length:] in NSDataGZipAdditions.o
      -[ParserForMainReturn uncompressZippedData:] in ParserForMainReturn.o
  "_inflateInit2_", referenced from:
      -[ParserForMainReturn uncompressZippedData:] in ParserForMainReturn.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)