Modifies HelloWorldLayer.m for Cocos2D that demonstrates isAnchorRelative behavior

HelloWorldLayer.m

//
//  HelloWorldLayer.m
//  relativeAnchorPointTest
//
//  Created by Drew P-B on 3/24/12.
//  Copyright __MyCompanyName__ 2012. All rights reserved.
//


// Import the interfaces
#import "HelloWorldLayer.h"

@interface HelloWorldLayer () 
{
    NSMutableArray *labels_;
    NSMutableArray *parents_;
    CGPoint c00, c55, c11;
    BOOL shouldFlip;
}
@end


// HelloWorldLayer implementation
@implementation HelloWorldLayer

+(CCScene *) scene
{
	// 'scene' is an autorelease object.
	CCScene *scene = [CCScene node];
	
	// 'layer' is an autorelease object.
	HelloWorldLayer *layer = [HelloWorldLayer node];
	
	// add layer as a child to scene
	[scene addChild: layer];
	
	// return the scene
	return scene;
}

// on "init" you need to initialize your instance
-(id) init
{
	if((self=[super init])) {
		CCLabelTTF *rel00, *ind00, *rel55, *ind55, *rel11, *ind11;
        
		CGSize size = [[CCDirector sharedDirector] winSize];
        labels_ = [[NSMutableArray arrayWithCapacity:12] retain];
        parents_ = [[NSMutableArray arrayWithCapacity:6] retain];
        
        self.isRelativeAnchorPoint = YES;
        self.anchorPoint = CGPointMake(0, 0);
        
        c00 = CGPointMake(size.width/4, size.height/2);

		ind00 = [CCLabelTTF labelWithString:@"Not Relative1" fontName:@"Marker Felt" fontSize:32];
		ind00.position = c00;
        ind00.isRelativeAnchorPoint = NO;
        ind00.anchorPoint = CGPointMake(0,0);
        
        rel00 = [CCLabelTTF labelWithString:@"Relative1" fontName:@"Marker Felt" fontSize:32];
        rel00.position = c00;
        rel00.isRelativeAnchorPoint = YES;
        rel00.anchorPoint = CGPointMake(0,0);
        
        c55 = CGPointMake(size.width/2, size.height/2);
        
		ind55 = [CCLabelTTF labelWithString:@"Not Relative2" fontName:@"Marker Felt" fontSize:32];
		ind55.position = c55;
        ind55.anchorPoint = CGPointMake(.5,.5);
        ind55.isRelativeAnchorPoint = NO;
        
        rel55 = [CCLabelTTF labelWithString:@"Relative2" fontName:@"Marker Felt" fontSize:32];
        rel55.position = c55;
        rel55.anchorPoint = CGPointMake(.5,.5);
        rel55.isRelativeAnchorPoint = YES;
        
        c11 = CGPointMake(3*(size.width/4), size.height/2);
        
		ind11 = [CCLabelTTF labelWithString:@"Not Relative3" fontName:@"Marker Felt" fontSize:32];
		ind11.position = c11;
        ind11.anchorPoint = CGPointMake(1,1);
        ind11.isRelativeAnchorPoint = NO;
        
        rel11 = [CCLabelTTF labelWithString:@"Relative3" fontName:@"Marker Felt" fontSize:32];
        rel11.position = c11;
        rel11.anchorPoint = CGPointMake(1,1);
        rel11.isRelativeAnchorPoint = YES;
		
		[self addChild:ind00];
		[self addChild:rel00];
		[self addChild:ind55];
		[self addChild:rel55];
		[self addChild:ind11];
		[self addChild:rel11];
        
        CCLabelTTF *chI00, *chR00, *chI55, *chR55,*chI11, *chR11;
        
        chR00 = [CCLabelTTF labelWithString:@"ChildR1" fontName:@"Marker Felt" fontSize:28];
        chR00.position = CGPointMake(0, 100);
        chR00.isRelativeAnchorPoint = NO;
        
        chI00 = [CCLabelTTF labelWithString:@"ChildI1" fontName:@"Marker Felt" fontSize:28];
        chI00.position = CGPointMake(0, 100);
        chI00.isRelativeAnchorPoint = NO;
        
        chR55 = [CCLabelTTF labelWithString:@"ChildR2" fontName:@"Marker Felt" fontSize:28];
        chR55.position = CGPointMake(0, 100);
        chR55.isRelativeAnchorPoint = NO;
        
        chI55 = [CCLabelTTF labelWithString:@"ChildI2" fontName:@"Marker Felt" fontSize:28];
        chI55.position = CGPointMake(0, 100);
        chI55.isRelativeAnchorPoint = NO;
        
        chR11 = [CCLabelTTF labelWithString:@"ChildR3" fontName:@"Marker Felt" fontSize:28];
        chR11.position = CGPointMake(0, 100);
        chR11.isRelativeAnchorPoint = NO;
        
        chI11 = [CCLabelTTF labelWithString:@"ChildI3" fontName:@"Marker Felt" fontSize:28];
        chI11.position = CGPointMake(0, 100);
        chI11.isRelativeAnchorPoint = NO;
        
        [rel00 addChild:chR00];
        [ind00 addChild:chI00];
        [rel55 addChild:chR55];
        [ind55 addChild:chI55];
        [rel11 addChild:chR11];
        [ind11 addChild:chI11];
        
        [labels_ addObject:ind00];
        [labels_ addObject:rel00];
        [labels_ addObject:ind55];
        [labels_ addObject:rel55];
        [labels_ addObject:ind11];
        [labels_ addObject:rel11];
        [labels_ addObject:chR00];
        [labels_ addObject:chI00];
        [labels_ addObject:chR55];
        [labels_ addObject:chI55];
        [labels_ addObject:chR11];
        [labels_ addObject:chI11];
        
        [parents_ addObject:ind00];
        [parents_ addObject:rel00];
        [parents_ addObject:ind55];
        [parents_ addObject:rel55];
        [parents_ addObject:ind11];
        [parents_ addObject:rel11];
        
        
        self.isTouchEnabled = YES;
	}
	return self;
}

-(void) startRotating:(ccTime)deltaTime
{
    for (CCNode *node in parents_)
    {
        node.rotation += 10;
    }
}

-(void) longDown:(ccTime)deltaTime
{
    shouldFlip = NO;
    [self unschedule:@selector(longDown:)];
    [self schedule:@selector(startRotating:) interval:.2];
}

-(void) ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"Touch Began");
    shouldFlip = YES;
    [self schedule:@selector(longDown:) interval:1];
}

-(void) ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *) event
{
    NSLog(@"Touches Ended");
    [self unscheduleAllSelectors];
    if (shouldFlip)
    {
        for (CCNode *node in parents_)
        {
            node.scaleX *= -1;
        }
    }
}

-(void) drawAxisAtPoint:(CGPoint)point
{
    CGSize size = [[CCDirector sharedDirector] winSize];
    ccDrawLine(CGPointMake(0, point.y), CGPointMake(size.width, point.y));
    ccDrawLine(CGPointMake(point.x, 0), CGPointMake(point.x, size.height));
}

-(void) draw
{
    [super draw];
    
    glLineWidth(1.0f);
    glColor4f(.2, .2, .8, 1);
    [self drawAxisAtPoint:c00];
    [self drawAxisAtPoint:c55];
    [self drawAxisAtPoint:c11];
    
    glLineWidth(4.0f);
    glColor4f(.2, .8, .2, 1);
//    ccDrawCircle([self convertToWorldSpace:self.anchorPointInPixels], 15, 360, 10, NO);
    ccDrawCircle(self.anchorPointInPixels, 15, 360, 10, NO);
    
    glColor4f(.8, .2, .2, 1.0);
    for (CCNode *node in labels_)
    {
        ccDrawCircle([node convertToWorldSpace:node.anchorPointInPixels], 10, 360, 10, NO);
//        ccDrawCircle([self convertToNodeSpace:node.anchorPointInPixels], 10, 360, 10, NO);
//        ccDrawCircle(node.anchorPointInPixels, 10, 360, 10, NO);
    }
    glLineWidth(2.0f);
    //Where rel55 thinks (0,0) is.
    ccDrawLine(CGPointMake(0, 0), [[labels_ objectAtIndex:3] convertToWorldSpace:CGPointMake(0, 0)]);
//    //Where rel55 thinks its anchor point is.
//    ccDrawLine(CGPointMake(0, 0), [[labels_ objectAtIndex:3] convertToWorldSpace:[[labels_ objectAtIndex:5] anchorPointInPixels]]);
    //Where this layer thinks rel55 is.
//    ccDrawLine(CGPointMake(0, 0), c55);
}

// on "dealloc" you need to release all your retained objects
- (void) dealloc
{
//    c00 = nil; c55 = nil; c11 = nil;
    [parents_ release];
    [labels_ release];
	[super dealloc];
}
@end

Click and hold to apply rotation, do a quick click to flip along the X axis.
The red line from the lower left shows what the label it points to thinks is (0,0).

To it working, just create a new Cocos2D HelloWorld project in XCode (Cocos2D v.1.0.1, XCode 4.2) and replace HelloWorldLayer.m with this.