UnzipKit is an Objective-C zlib wrapper for compressing and decompressing Zip files on OS X and iOS. It's based on the AgileBits fork of Objective-Zip, developed by Flying Dolphin Studio.

It provides the following over Objective-Zip:

• A simpler API, with only a handful of methods, and no incantations to remember
• The ability to delete files in an archive, including overwriting an existing file
• Pervasive use of blocks, making iteration and progress reporting simple to use
• Full documentation for all methods
• Pervasive use of NSError, instead of throwing exceptions

UnzipKit supports both CocoaPods and Carthage. CocoaPods does not support dynamic framework targets (as of v0.39.0), so in that case, please use Carthage.

Cartfile:

github "abbeycode/UnzipKit"

Podfile:

pod "UnzipKit"

Using the method -deleteFile:error: currently creates a new copy of the archive in a temporary location, without the deleted file, then replaces the original archive. By default, all methods to write data perform a delete on the file name they write before archiving the new data. You can turn this off by calling the overload with an overwrite argument, setting it to NO. This will not remove the original copy of that file, though, causing the archive to grow with each write of the same file name.

If that's not a concern, such as when creating a new archive from scratch, it would improve performance, particularly for archives with a large number of files.

NSError *archiveError = nil;
UZKArchive *archive = [UZKArchive zipArchiveAtPath:@"An Archive.zip" error:&archiveError];
BOOL deleteSuccessful = [archive deleteFile:@"dir/anotherFilename.jpg"
                                      error:&error];

You can quickly and efficiently check whether a file at a given path or URL is a Zip archive:

BOOL fileAtPathIsArchive = [UZKArchive pathIsAZip:@"some/file.zip"];

NSURL *url = [NSURL fileURLWithPath:@"some/file.zip"];
BOOL fileAtURLIsArchive = [UZKArchive urlIsAZip:url];

NSError *archiveError = nil;
UZKArchive *archive = [UZKArchive zipArchiveAtPath:@"An Archive.zip" error:&archiveError];
NSError *error = nil;

You can use UnzipKit to perform these read-only operations:

• List the contents of the archive

NSArray<NSString*> *filesInArchive = [archive listFilenames:&error]; ```

• Extract all files to disk

BOOL extractFilesSuccessful = [archive extractFilesTo:@"some/directory" overWrite:NO progress: ^(UZKFileInfo *currentFile, CGFloat percentArchiveDecompressed) { NSLog(@"Extracting %@: %f%% complete", currentFile.filename, percentArchiveDecompressed); } error:&error]; ```

• Extract each archived file into memory

NSData *extractedData = [archive extractDataFromFile:@"a file in the archive.jpg" progress:^(CGFloat percentDecompressed) { NSLog(@"Extracting, %f%% complete", percentDecompressed); } error:&error]; ```

NSError *archiveError = nil;
UZKArchive *archive = [UZKArchive zipArchiveAtPath:@"An Archive.zip" error:&archiveError];
NSError *error = nil;
NSData *someFile = // Some data to write

You can also modify Zip archives:

• Write an in-memory NSData into the archive

BOOL success = [archive writeData:someFile filePath:@"dir/filename.jpg" error:&error]; ```

• Write data as a stream to the archive (from disk or over the network), using a block:

BOOL success = [archive writeIntoBuffer:@"dir/filename.png" error:&error block: ^BOOL(BOOL(^writeData)(const void bytes, unsigned int length), NSError*(actionError)) { for (NSUInteger i = 0; i <= someFile.length; i += bufferSize) { const void *bytes = // some data unsigned int length = // length of data

                    if (/* Some error occurred reading the data */) {
                        *actionError = // Any error that was produced, or make your own
                        return NO;
                    }

                    if (!writeData(&bytes, length)) {
                        return NO;
                    }
                }

                return YES;
            }];
```

• Delete files from the archive

BOOL success = [archive deleteFile:@"No-good-file.txt" error:&error]; ```

• UnzipKit: See LICENSE (BSD)
• MiniZip: See MiniZip website