cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   cocosboy
   Member

   Could some one guide me in Context of this post.

   http://www.cocos2d-iphone.org/forum/topic/7303#post-42962

   how can I use convertToNodeSpace to detect my Sprite is touched?

   thanks in advance

   Posted 1 year ago #
2. 

   Wayne
   Member

   I think this is easy for most people here to do, but I also had a lot of trouble figuring out how to do this. What I do to detect touches on a sprite in my game is something like below.

   First, when you place a sprite , add a tag number so you can retrieve the sprite easily later. For example:

   [ItemscrollLayer addChild:itemSprite z:Zorder tag:ImageTagNumber]; // use a tag so sprite can be retrieved later

   Now , in your ccTouchesBegan method :

   CCSprite *itemSprite = (CCSprite*)[ItemscrollLayer getChildByTag:ImageTagNumber];   // get the image sprite
   
   CGPoint SpritePosition = [itemSprite position];     // get the position of the sprite 
   
   CGPoint tapPosition = [ItemscrollLayer convertToNodeSpace:[[CCDirector sharedDirector] convertToGL:[touch locationInView:touch.view]]];     // get the tapped position
   
   CGRect SpriteRectangle = CGRectMake(SpritePosition.x-SpriteSize.width/2, SpritePosition.y-SpriteSize.height/2, SpriteSize.width, SpriteSize.height);     // get a rectangle of the sprite so it can be compared with the tapped position point
   
   if (CGRectContainsPoint(SpriteRectangle,tapPosition))  // here's where we find out if the sprite was tapped or not
   {
   // do something here if the sprite was tapped
   }

   Hope that helps.

   Posted 1 year ago #
3. 

   riq
   Key Master

   @cocosboy Don't create a new thread asking to read another thread. Avoid creating unnecessary noise.

   thread closed. continue the discussion on the other thread.

   Posted 1 year ago #

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