ios - Cocos2d 触摸调度程序导致对象保留

Question

我对 cocos2d 有疑问。我做了一个接收触摸的类。类是 CCLayer 的子类，init 如下所示:

- (id)initWithFrame:(CGRect)frameSize
{
    self = [super init];
    if (self)
    {
        frame = frameSize;
        size = frame.size;
        origin = frame.origin;
        [[[CCDirector sharedDirector] touchDispatcher] addTargetedDelegate:self priority:0 swallowsTouches:YES];
    }
    return self;
}

所以一切都保持简单。 frame、size 和 origin 是类变量，但现在这并不重要。所以我注册了我的类女巫touchDispatcher，它允许我处理触摸。触摸处理是这样完成的:

- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event
{
    return YES;
}

- (void)ccTouchEnded:(UITouch *)touch withEvent:(UIEvent *)event
{
    //Some touch logic which i need.
}

在 dealloc 中，我释放所有保留的信息并从 touchDispatcher 中注销。但是 dealloc 永远不会被调用。如果我没有向 touchDispatcher 注册，则会正确调用 dealloc。如果重要，这个类作为子类添加到另一个 CCLayer 子类中，在那个类的 dealloc 中我发布了这个。

我错过了什么？

Answer 1

要澄清 giorashc 的答案，请执行此操作。 :

- (void)onEnter {
    [super onEnter];
    [[CCDirector sharedDirector].touchDispatcher addTargetedDelegate:self priority:0 swallowsTouches:YES];
}

- (void)onExit {
    // called before the object is removed from its parent
    // force the director to 'flush' its hard reference to self
    // therefore self's retain count will be 0 and dealloc will
    // be called.
    [super onExit];
    [[CCDirector sharedDirector].touchDispatcher removeDelegate:self];
}