Development target: Mac OS X Lion, Xcode

I have a NSFileWrapper that I want to zip up. If it is a regular file, I can zip it fine by passing [newZip AppendData:[thisWrapper preferredFilename] data:[thisWrapper regularFileContents]]

After WriteZipandClose, the file is a perfect zip and I can open it.

However, if the FileWrapper is a directory ([thisWrapper isDirectory]), I'm having some problems. I initially tried passing -serializedRepresentation into AppendData: [newZip AppendData:[thisWrapper preferredFilename] data:[thisWrapper serializedRepresentation]];

But this does not create a valid file. The format is corrupt somehow. Honestly, I would have been surprised if it had worked, so no worries there.

So, I wrote a recursive routine that walks down the FileWrapper tree (with [thisWrapper fileWrappers]). However, when I try to add zips together, I get a non-unzippable file. I suspect it's because the resulting zip has multiple headers. Here's my current code:

- (NSData *)zipDirectory:(NSFileWrapper *)directoryWrapper;
{
BOOL success;
MGGZip *newZip = [[MGGZip alloc] init]; //MGGZip subclass of CKOzip. init handles 'unlock component'
success = [newZip NewZip:[NSString stringWithFormat:@"~/ziptest/%@.zip", [directoryWrapper preferredFilename]]];
if (success != YES) {
    NSLog(@"Failure: %@", newZip.LastErrorText);
    return nil;
}

[newZip setPathPrefix:[NSString stringWithFormat:@"%@/",[directoryWrapper preferredFilename]]];
NSDictionary *fileWrappers = [directoryWrapper fileWrappers];
for (id wrapperKey in fileWrappers) {
    NSFileWrapper *thisWrapper = [fileWrappers objectForKey:wrapperKey];
    if ([thisWrapper isDirectory]) {
        NSData *returnedData = [self zipDirectory:thisWrapper];
        [newZip AppendData:[thisWrapper preferredFilename] data:returnedData];

    } else {
        [newZip AppendData:[thisWrapper preferredFilename] data:[thisWrapper regularFileContents]];
    }
}
return [newZip WriteToMemory];
}

Called from:

MGGZip *newZip = [[MGGZip alloc] init];
success = [newZip NewZip:[NSString stringWithFormat:@"~/ziptest/%@.zip", [thisWrapper preferredFilename]]];
if (success != YES) {
NSLog(@"Failure: %@", newZip.LastErrorText);
return;
}
NSData *returnedData = [self zipDirectory:thisWrapper];
[newZip AppendData:[thisWrapper preferredFilename] data:returnedData];

[newZip WriteZipAndClose];

Any suggested ways to make this happen? I was going to play with CkoZipEntry, but there's no way to add the folder structure?

Thanks.

Archived Forum Post

Index of archived forum posts

Combining CkoZip (or create CkoZip while recursing NSFileWrapper)

Mar 08 '13 at 18:52