代码简写

NSBundle *mainBundle = [NSBundle mainBundle];
        NSArray *imageURLs = [mainBundle URLsForResourcesWithExtension:@"JPG" subdirectory:@"Demo Images"];
        
        if ([imageURLs count] > 0) {
            NSMutableArray *photos = [[NSMutableArray alloc] init];
            for (NSURL *imageURL in imageURLs) {
                FICDPhoto *photo = [[FICDPhoto alloc] init];
                [photo setSourceImageURL:imageURL];
                [photos addObject:photo];
                [photo release];
            }