iphone - Action 不会在 iPhone 版 cocos2d 中的 ccTouchBegan 中的 CCSprite 上运行

Question

我试图在检测到触摸后立即放大按钮。这是我的场景:

@implementation HomeScene

-(id) init
{
  if((self = [super init])) {
    ...
    // sp_btn_story is retained...
    sp_btn_story = [[CCSprite spriteWithFile:@"main_menu_btn.png"] retain];
    sp_btn_story.position = ccp(size.width - 146, 110);
    [self addChild: sp_btn_story];
    ...
  }
  return self;
}

-(void) onEnter
{
  [[CCTouchDispatcher sharedDispatcher] addTargetedDelegate:self priority:0 swallowsTouches:YES];
}

-(void) onExit
{
  [[CCTouchDispatcher sharedDispatcher] removeDelegate:self];
}

- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event
{
  NSLog(@"tapped!");
  sp_btn_story.scaleX = 2;

  [sp_btn_story stopAllActions];
  [sp_btn_story runAction: [CCScaleTo actionWithDuration:0.5f scale:1.2f]];
  return YES;
}

...

@end

正如预期的那样，它很好地缩放了 X。 (我把它放在那里进行测试。)但是由于某种原因该操作没有运行。 :( 有人有什么想法吗？

编辑:使用 cocos2d 0.99 顺便说一句。

Answer 1

此问题的答案(从提问者自己的评论中重新发布，以使其更加明显):

It's quite important to call

[super onEnter];

if you overwrite this method in a subclass or strange things may happen. Cocos2D will not be happy.

This applies to other (if not all) methods as well, e. g. always call

[super onExit];

as well.