Recipes

Writing a new zip file containing a directory:

ZZMutableArchive* newArchive = [ZZMutableArchive archiveWithContentsOfURL:[NSURL fileURLWithPath:@"/tmp/new.zip"]];
[newArchive updateEntries:
 @[
 [ZZArchiveEntry archiveEntryWithDirectoryName:@"folder/"],
 [ZZArchiveEntry archiveEntryWithFileName:@"folder/first.text"
                                 compress:YES
                                dataBlock:^(NSError** error)
  {
      return [@"hello, world" dataUsingEncoding:NSUTF8StringEncoding];
  }]
 ]
                    error:nil];

Unzip an existing zip file to the file system:

NSFileManager* fileManager = [NSFileManager defaultManager];
NSURL* path = [NSURL fileURLWithPath:@"/tmp/old"];
@autoreleasepool
{
    ZZArchive* archive = [ZZArchive archiveWithContentsOfURL:[NSURL fileURLWithPath:@"/tmp/old.zip"]];
    for (ZZArchiveEntry* entry in archive.entries)
    {
        NSURL* targetPath = [path URLByAppendingPathComponent:entry.fileName];
        
        if (entry.fileMode & S_IFDIR)
            // check if directory bit is set
            [fileManager createDirectoryAtURL:targetPath
                  withIntermediateDirectories:YES
                                   attributes:nil
                                        error:nil];
        else
        {
            // Some archives don't have a separate entry for each directory and just
            // include the directory's name in the filename. Make sure that directory exists
            // before writing a file into it.
            [fileManager createDirectoryAtURL:[targetPath URLByDeletingLastPathComponent]
                  withIntermediateDirectories:YES
                                   attributes:nil
                                        error:nil];
            
            [entry.data writeToURL:targetPath
                        atomically:NO];
        }
    }

    // We are now done with the archive
    archive = nil;
}