objective-c - 如何在Cocos2d中实现精灵的触摸消失?
怪我咯
怪我咯 2017-04-21 11:19:24
0
1
674

我正在用cocos2d开发一款iPhone2d游戏,其中设置有很多小精灵。我想通过触摸两个类似的精灵的方式,将它们两个都隐藏起来,我如何能够实现这种效果呢?

原问题:How can I detect touch in cocos2d?

怪我咯
怪我咯

走同样的路,发现不同的人生

Antworte allen(1)
PHPzhong

答:Jonas
(最佳答案)
在含有精灵的layer中,你需要输入:

self.isTouchEnabled = YES;

然后,你可以使用在UIView中的相同event,但是它们被调用的方法不同:

- (void)ccTouchesBegan:(NSSet*)touches withEvent:(UIEvent*)event
{
   UITouch* touch = [touches anyObject];
  //in your touchesEnded event, you would want to see if you touched
  //down and then up inside the same place, and do your logic there.
}

答:Terence
想要实现这种效果,可以给精灵设置定界框(bounding box),在下述代码中,我将所有精灵都置于NSMutableArray中,并检查它们是否处于定界框内,同时要保证已经初始化触摸操作:

- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event 
{
  CGPoint location = [self convertTouchToNodeSpace: touch];

  for (CCSprite *station in _objectList)
  {
    if (CGRectContainsPoint(station.boundingBox, location))
    {
      DLog(@"Found sprite");
      return YES;
    }
  }

  return NO;
}

答:David Higgins
根据Jonas的回答,我又进行了进一步的完善:

- (void)ccTouchesBegan:(NSSet*)touches withEvent:(UIEvent*)event
{
   UITouch* touch = [touches anyObject];
   CGPoint location = [[[Director sharedDirector] convertCoordinate: touch.location];
   CGRect particularSpriteRect = CGMakeRect(particularSprite.position.x, particularSprite.position.y, particularSprite.contentSize.width, particularSprite.contentSize.height);
   if(CGRectContainsPoint(particularSpriteRect, location)) {
     // particularSprite touched
     return kEventHandled;
   }
}

你可能需要调整x/y的位置,保证精灵的“中心位置”。


答:John
David的代码在Cocos 0.7.3和2.2.1上,会出现错误信息,所以我用CGRectMake替代CGMakeRect,用[touch locationInView:touch.view]纠正了[touch location]的错误:

- (BOOL)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch * touch = [touches anyObject];

    CGPoint location = [[Director sharedDirector] convertCoordinate: [touch locationInView:touch.view]];
    CGRect myRect = CGRectMake(sprite.position.x, sprite.position.y, sprite.contentSize.width, sprite.contentSize.height);


    if(CGRectContainsPoint(myRect, location)) {
        // particularSprite touched
        return kEventHandled;
    }
}
Neueste Downloads
Mehr>
Web-Effekte
Quellcode der Website
Website-Materialien
Frontend-Vorlage