LOZIPFileWrapper is a Cocoa wrapper around a modern minizip with support for extended attributes.

Features:

• -[LOZIPFileWrapper initWithURL:] for unzipping file based zips

• -[LOZIPFileWrapper initWithZIPData:] for unzipping memory based zips

• -[LOZIPFileWrapper contentOfZIPFileIncludingFolders:error:] list of filenames in the zip archive

• -[LOZIPFileWrapper contentAttributesOfZIPFileIncludingFolders:error:] dictionary of item details like compressed size, size, encryption in the zip archive

• -[LOZIPFileWrapper contentsAtPath:error:] NSData for item in the zip archive

• -[LOZIPFileWrapper writeContentOfZIPFileToURL:options:error:error extract zip archive to a folder.

It requires only 10 files compared to the ~40 files of ZipZap.

1. Add LOZIPFileWrapper.h, LOZIPFileWrapper.m, and minizip (required are zip.c, zip.h, unzip.c, unzip.h, ioapi.c, ioapi.h, ioapi_mem.c, ioapi_mem.h.) to your project.
2. Add the libz library to your target

macOS Archive Utilitly and ditto stores extended attributes in ZIP archives as AppleDouble. Also known as __MACOSX folder with ._ files. LOZIPFileWrapper handles these correctly and sets them using sys/xattr.h.

My usage just required reading zips. If somebody is intrested in write support I would suggest to start with having a look at minizip.c.

LOZIPFileWrapper is licensed under the MIT license. A version of Minizip is also included and is licensed under the Zlib license.

Thanks nmoinvaz for keeping minizip up-to-date. And to everybody in the miniunz.c copyright.