It is allowed to use ssziparchive library in the App Store?

Question

Due to cryptography export regulations, it is possible to use this library? or which one could I use to compress/decompress files?

Answer 1

I don't know if SSZipArchive is allowed to use in distributed apps, but the library I am using is Objective-Zip.

It can be easily integrated into any project.

Sample code for zipping:

// create a zip file for writing
ZipFile *zipFile= [[ZipFile alloc] initWithFileName:pathOfTheFileToBeZipped mode:ZipFileModeCreate];

// Add a file, write to its stream and close it
ZipWriteStream *stream1= [zipFile writeFileInZipWithName:@"abc.txt" fileDate:[NSDate dateWithTimeIntervalSinceNow:-86400.0] compressionLevel:ZipCompressionLevelBest];
NSString *text= @"abc";
[stream1 writeData:[text dataUsingEncoding:NSUTF8StringEncoding]];
[stream1 finishedWriting];

// Add another file, write to its stream and close it
ZipWriteStream *stream2= [zipFile writeFileInZipWithName:@"x/y/z/xyz.txt" compressionLevel:ZipCompressionLevelNone];
NSString *text2= @"XYZ";
[stream2 writeData:[text2 dataUsingEncoding:NSUTF8StringEncoding]];
[stream2 finishedWriting];

// Close the zip file
[zipFile close];

Sample code for unzipping:

// open the zip file for reading
ZipFile *unzipFile = [[ZipFile alloc] initWithFileName:pathOfTheFileToBeUnzipped mode:ZipFileModeUnzip];

// retrieve the info of the files inside
NSArray *infos= [unzipFile listFileInZipInfos];

// iterate over files
for (FileInZipInfo *info in infos) {        
    // locate the file in the zip
    [unzipFile locateFileInZip:info.name];

    // expand the file in memory
    ZipReadStream *read= [unzipFile readCurrentFileInZip];
    NSData *data = [read readDataOfLength:info.length];
    [read finishedReading];

    // construct the folder/file path structure
    NSString *unzipPathFilename = [unzipPath stringByAppendingPathComponent:info.name];
    NSString *unzipPathFoldername = [[unzipPathFilename stringByDeletingLastPathComponent] copy];
    NSError *errorw;

    // write the unzipped files, with some consistency checks
    NSRange range = [unzipPathFoldername rangeOfString:@"__MACOSX"];

    if (range.location == NSNotFound) {
        if ([fileManager createDirectoryAtPath:unzipPathFoldername withIntermediateDirectories:YES attributes:nil error:&errorw]) {
            if (![[unzipPathFilename pathExtension] isEqualToString:@""] && ![[[unzipPathFilename lastPathComponent] substringToIndex:1] isEqualToString:@"." ]) {
                [data writeToFile:unzipPathFilename atomically:NO];
            }
        }
        else {
            NSLog(@"Directory Fail: %@", errorw);
        }
    }
}

// close the zip file
[unzipFile close];