Tengo un pequeño problema. En este tutorialCómo hacer un juego basado en fichas con Cocos2D 2.X usé cocos2d V2.0, quiero hacer esto en cocos2d V3.0. Por lo tanto, no funciona! ¡Gracias! (No hablo ingles)

Creo que el problema en esta línea - self.position = viewPoint;

@property (strong) CCTiledMap *tileMap;
@property (strong) CCTiledMapLayer *background;
@property (strong) CCSprite *player;



- (id)init
{
    // Apple recommend assigning self with supers return value
    self = [super init];
    if (!self) return(nil);

    // Enable touch handling on scene node
    self.userInteractionEnabled = YES;

    self.tileMap = [CCTiledMap tiledMapWithFile:@"TileMap.tmx"];
    self.background = [_tileMap layerNamed:@"Background"];
    [self addChild:_tileMap z:-1];

    CCTiledMapObjectGroup *objectGroup = [_tileMap objectGroupNamed:@"Objects"];
    NSAssert(objectGroup != nil, @"tile map has no objects object layer");

    NSDictionary *spawnPoint = [objectGroup objectNamed:@"SpawnPoint"];
    int x = [spawnPoint[@"x"] integerValue];
    int y = [spawnPoint[@"y"] integerValue];

    _player = [CCSprite spriteWithImageNamed:@"Player.png"];
    _player.position = ccp(x,y);

    [self addChild:_player];
    [self setViewPointCenter:_player.position];

    // done
    return self;
}


- (void)setViewPointCenter:(CGPoint) position {

    CGSize winSize = [CCDirector sharedDirector].viewSize;

    int x = MAX(position.x, winSize.width/2);
    int y = MAX(position.y, winSize.height/2);
    x = MIN(x, (_tileMap.mapSize.width * _tileMap.tileSize.width) - winSize.width / 2);
    y = MIN(y, (_tileMap.mapSize.height * _tileMap.tileSize.height) - winSize.height/2);
    CGPoint actualPosition = ccp(x, y);

    CGPoint centerOfView = ccp(winSize.width/2, winSize.height/2);
    CGPoint viewPoint = ccpSub(centerOfView, actualPosition);

    self.position = viewPoint;
}

-(void)touchBegan:(UITouch *)touch withEvent:(UIEvent *)event
{
    CGPoint touchLocation = [touch locationInView:touch.view];
    touchLocation = [[CCDirector sharedDirector] convertToGL:touchLocation];
    touchLocation = [self convertToNodeSpace:touchLocation];

    CGPoint playerPos = _player.position;
    CGPoint diff = ccpSub(touchLocation, playerPos);

    if ( abs(diff.x) > abs(diff.y) ) {
        if (diff.x > 0) {
            playerPos.x += _tileMap.tileSize.width;
        } else {
            playerPos.x -= _tileMap.tileSize.width;
        }
    } else {
        if (diff.y > 0) {
            playerPos.y += _tileMap.tileSize.height;
        } else {
            playerPos.y -= _tileMap.tileSize.height;
        }
    }

    CCLOG(@"playerPos %@",CGPointCreateDictionaryRepresentation(playerPos));

    // safety check on the bounds of the map
    if (playerPos.x <= (_tileMap.mapSize.width * _tileMap.tileSize.width) &&
        playerPos.y <= (_tileMap.mapSize.height * _tileMap.tileSize.height) &&
        playerPos.y >= 0 &&
        playerPos.x >= 0 )
    {
        [self setPlayerPosition:playerPos];
    }

    [self setViewPointCenter:_player.position];
    NSLog(@"%@", NSStringFromCGPoint(touchLocation));
}

-(void)setPlayerPosition:(CGPoint)position {
    _player.position = position;
}