EXIF handling methods in a photo model object

gistfile1.m

- (void)attachMetadata
{
    DLog(@"EXIF data is %@",self.exifData);
    [self.exifData setObject:@1 forKey:@"Orientation"];

    NSData *jpeg = UIImageJPEGRepresentation(self.image, 1);
    CGImageSourceRef sourceRef = CGImageSourceCreateWithData((__bridge CFDataRef)jpeg, NULL);
    NSMutableData *dest_data = [NSMutableData data];
    CFStringRef UTI = CGImageSourceGetType(sourceRef);
    CGImageDestinationRef destination = CGImageDestinationCreateWithData((__bridge CFMutableDataRef)dest_data,UTI,1,NULL);
    CGImageDestinationAddImageFromSource(destination,sourceRef,0, (__bridge CFDictionaryRef) self.exifData);

    BOOL success = NO;
    success = CGImageDestinationFinalize(destination);
    if(success) {
        [dest_data writeToFile:self.cFilePath atomically:YES];
    } else {
        DLog(@"***Could not create data from image destination ***");
    }

    CFRelease(destination);
    CFRelease(sourceRef);
    self.locationManager = nil;
}