每 5 秒后下落的精灵

Question

我想在每 5 秒后丢弃一些对象。我的问题是，最先出现在屏幕上的动物会掉下来，但之后的动物不会掉下来，它们会粘在原来的位置上。

我丢弃动物的代码是：

-(void)dropAnimal
{  
    [self performSelector:@selector(dropAnimal) withObject:nil afterDelay:5];
    prevojectIndex=objectIndex;
    prevIndex=currentIndex;

    float padding = sw*128/768;
    float x = (float)(arc4random()%(int)(sw-padding*2))+padding;

    if([SpritesARRAY count]>0)
    {
        objectIndex=arc4random()%[SpritesARRAY count];
        object=[SpritesARRAY objectAtIndex:objectIndex];
        object.falling = YES;
        currentIndex=arc4random()%[animalsArray count];
        [object initWithSpriteFrameName:[animalsArray objectAtIndex:currentIndex]];
        object.position = ccp(x, sh*31/32-self.position.y);

        objectsDictionary=[NSMutableDictionary dictionary];
        [objectsDictionary setObject:object forKey:[[NSNumber numberWithInt:objectIndex] stringValue]];
        [objectsDictionary retain];
        [SpritesARRAY removeObjectAtIndex:objectIndex];
        [self  animateAnimal];

    }    
}

-(void) animateAnimal 
{
  FallAnimal *CurObject=[objectsDictionary objectForKey:[[NSNumber numberWithInt:objectIndex] stringValue]];
   [CurObject runAction:[CCMoveTo actionWithDuration:2 position:CGPointMake(CurObject.position.x,90)]];
      [CurObject release];
  }

Answer 1

你不应该在这里释放 CurObject：

-(void) animateAnimal 
{
  FallAnimal *CurObject=[objectsDictionary objectForKey:[[NSNumber numberWithInt:objectIndex] stringValue]];
  [CurObject runAction:[CCMoveTo actionWithDuration:2 position:CGPointMake(CurObject.position.x,90)]];
  [CurObject release];  // <-- makes no sense, you did not retain it!
}