Cause IBOutletCollectionss are useful, but painful and ill supported by IB. You will want this code.

gistfile1.txt

- (NSArray*)sortArrayByY:(NSArray*)array{
    return [array sortedArrayUsingComparator:^NSComparisonResult(id label1, id label2) {
        if ([label1 frame].origin.y < [label2 frame].origin.y) return NSOrderedAscending;
        else if ([label1 frame].origin.y > [label2 frame].origin.y) return NSOrderedDescending;
        else return NSOrderedSame;
    }];
}

- (void)clearTextInArray:(NSArray*)array{
    for (UILabel* label in array){
        label.userInteractionEnabled = NO;
        label.textColor = [UIColor blackColor];
        label.text = @"";
    }
}