readDataOfLength

[fabiomassimo]

On a branch of code I've this

ZipFile *archive = [[ZipFile alloc] initWithFileName:archivePath mode:ZipFileModeUnzip];

if ( ! [archive locateFileInZip:filePath])
{
    [archive close];

    return nil;
}

FileInZipInfo *info = [archive getCurrentFileInZipInfo];

ZipReadStream *stream = [archive readCurrentFileInZip];



NSData *data = [stream readDataOfLength:info.length];<-------INTERFACE ERROR

[stream finishedReading];

[archive close];

return data;

But I get interface error. How can i fix it?

[aburgh]

The correct method name is:

- (NSData *)readDataOfLength:(NSUInteger)length error:(NSError **)readError

so you are leaving off the "error:" If the read fails, the method returns nil instead of an NSData object. If you don't want the error object, you still have to pass NULL, e.g., your line should be:

NSData *data = [stream readDataOfLength:info.length error:NULL];

The idiom is the same as what Apple uses throughout Cocoa.