gistfile1.m

@implementation CCNode (centering)
    
-(void) centerContentWithPadding:(int)padding TotalWidth:(int)totalWidth{
    int contentWidth = 0;
    for(int i=0; i < self.children.count; i++) {
        CCNode *child = [self.children objectAtIndex:i];
        contentWidth += child.contentSize.width;
    }
    
    int currentX = (totalWidth - contentWidth) / 2;
    for(int i=0; i < self.children.count; i++) {
        CCNode *child = [self.children objectAtIndex:i];
        child.position = ccp(currentX + child.anchorPoint.x * child.contentSize.width, child.position.y);
        currentX += child.contentSize.width + padding;
    }
}
       
@end