http://blog.octo.com/en/untar-on-ios-the-pragmatic-way/
NSData* tarData = [NSData dataWithContentsOfFile:@"/path/to/your/tar/file.tar"];
NSError *error;
[[NSFileManager defaultManager] createFilesAndDirectoriesAtPath:@"/path/to/your/extracted/files/" withTarData:tarData error:&error];
请记住,您不能在您的应用程序目录外写入