Cocos2d-将CCSprite传递给子层

Question

I have a scene, a main layer and a child layer, the main layer contains a Player* object which is a subclass of CCSprite, I want to pass the Player into the child layer like so:

BattleLayer* b = [[BattleLayer alloc] initWithPlayer:_player];
[((CCScene*)self.parent) addChild:b];

-(id)initWithPlayer:(Player *)p
{
    if((self=[super init]))
    {
        _player = p;
        [self addChild:_player.spriteSheet];
    }
    return self;
}

However, this gives an error when I do [self addChild:_player.spriteSheet];

*** Assertion failure in -[BattleLayer addChild:z:tag:]

I've tried removing the sprite from the main layer before passing it in, but even with cleanup:NO this gives an error of

*** -[CCSpriteBatchNode tag]: message sent to deallocated instance 0x747a580

What am I doing wrong here? And what's the best way of achieving this?

Answer 1

I can see one of three things causing an addSprite assertion failure.

• p is nil
• p.spriteSheet is nil
• or finally, p.spriteSheet already has a parent (ie spriteSheet has already been added to a CCNode beforehand)

Answer 2

I've run in to this before and retained and then released after reordering. My objects were autoreleased and retained only by the CCLayer so this worked, Try:

[_player retain];
[_player removeFromParentAndCleanUp:YES];
[self addChild:_player];
[_player release];

However I have run into a bug with rapid removal and re-adding of sprites and it is described here: http://www.cocos2d-iphone.org/forum/topic/9980