Question

Using ASIHTTPRequest, I downloaded a zip file containing a folder with several audio files. I tried to unzip the file with SSZipArchive and ZipArchive, which are both based on minizip.

When I compile the code, I get this error: Undefined symbols for architecture i386: "_OBJC_CLASS_$_ZipArchive", referenced from: objc-class-ref in AppDelegate.o.

How do I unzip this file in iOS?

Answer 1

I’ve used ZipArchive with success in the past. It’s pretty ligthweight and simple to use, supports password protection, multiple files inside a ZIP, as well as compress & decompress.

The basic usage is:

NSString *filepath = [[NSBundle mainBundle] pathForResource:@"ZipFileName" ofType:@"zip"];
ZipArchive *zipArchive = [[ZipArchive alloc] init];
[zipArchive UnzipOpenFile:filepath Password:@"xxxxxx"];
[zipArchive UnzipFileTo:{pathToDirectory} overWrite:YES];
[zipArchive UnzipCloseFile];
[zipArchive release];

more examples about this package here

I have also tried SSZipArchive in some projects.
Below line would unzip your zip file.

[SSZipArchive unzipFileAtPath:path toDestination:destination];