cocos2d for iPhone

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

1. 

   Cohars
   Member

   Hi,
   I read it : http://www.cocos2d-iphone.org/wiki/doku.php/tips:using_accelerometer_for_sprite_movement

   But I do not understand those lines :

   // use the running scene to grab the appropriate game layer by it's tag
   GameLayer *layer = (GameLayer *)[[[CCDirector sharedDirector] runningScene] getChildByTag:kTagGameLayer];
   // grab the player sprite from that layer using it's tag
   CCSprite *playerSprite = (CCSprite *)[layer getChildByTag:kTagSpritePlayer];

   - What is GameLayer ?
   - What do I write there : (GameLayer *) and there : (CCSprite *) .

   Thanks.

   EDIT : I made severales tries, this on looks to be the best :
   

   // use the running scene to grab the appropriate game layer by it's tag
   HelloWorld *layer = [HelloWorld [[CCDirector sharedDirector] runningScene] getChildByTag:kTagGameLayer];
   // grab the player sprite from that layer using it's tag
   CCSprite *playerSprite = [killer[layer getChildByTag:kTagSpritePlayer]];

   HelloWorld is declared in the .h @interface HelloWorld : CCLayer {...} , and killer is the sprite whcich I want to make move.

   Posted 1 year ago #
2. 

   xcrunner509
   Member

   Is the code not working for you or do you just not understand it, or is it both?

   (Side note, please post in appropriate area)

   -Nick

   Posted 1 year ago #
3. 

   Cohars
   Member

   :s sorrry, how can I change area ? Is it OK for this subject ? Sorry.

   I don't understand, and that don't work. Because I don't know what to write there : (GameLayer *) and there : (CCSprite *) . And of course, if I let it like that, that don't work.
   I also don't understand that : getChildByTag:kTagGameLayer

   Posted 1 year ago #
4. 

   tallmystcarpet
   Member

   Imagine Cocos as a big library where you can store books. You can store any new book by adding it as a child and reference it by a tag.
   When you need to use any book, you'll use getChildByTag to find a book by it's tag (which in this case is "kTagGameLayer").

   If you find this too complicated, start with something more simple :
   Apparently, you're trying to use the accelerometer, so skip this part and read the rest of wiki.

   Posted 1 year ago #
5. 

   Cohars
   Member

   Maybe there is another way to use the accelerometer no ?

   No matter, I've got several other things to learn, I'll come back on the accelerometer later !

   Posted 1 year ago #

RSS feed for this topic

Reply

You must log in to post.