一、非cocoaPods方法，需要注意的是：直接将SSZipArchive拖入项目编译会报错。
Undefined symbols for architecture x86_64:
"_crc32", referenced from:
_unzReadCurrentFile in unzip.o
_zipWriteInFileInZip in zip.o
"_deflate", referenced from:
_zipWriteInFileInZip in zip.o
_zipCloseFileInZipRaw64 in zip.o
"_deflateEnd", referenced from:
_zipCloseFileInZipRaw64 in zip.o
"_deflateInit2_", referenced from:
_zipOpenNewFileInZip4_64 in zip.o
"_get_crc_table", referenced from:
_unzOpenCurrentFile3 in unzip.o
_zipOpenNewFileInZip4_64 in zip.o
"_inflate", referenced from:
_unzReadCurrentFile in unzip.o
"_inflateEnd", referenced from:
_unzCloseCurrentFile in unzip.o
"_inflateInit2_", referenced from:
_unzOpenCurrentFile3 in unzip.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
将框架拖入项目，还需要引入另一个资源包。如图：
二、利用cocoaPods导入的SSZipArchive则不需要导入任何资源包，因为系统已经帮我们做好了。代码示例：
