cocos2d for iPhone

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

1. 

   NeilB
   Member

   Hi guys,

   I am using the 1.0 RC3 cocos. I have Subclassed from CCLayer to make a user input layer but when I try to catch multi touch events I don't get them. I am using the function below to catch the touches. I only get the first touch. Does anyone know what I am doing wrong?

   - (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event
   {
   //Add a new body/atlas sprite at the touched location
   CGPoint location = [touch locationInView: [touch view]];

   location = [[CCDirector sharedDirector] convertToGL: location];
   if (CGRectContainsPoint(jumpRect, location)) {
   [player jump];
   NSLog(@"JUMP");
   }
   if (CGRectContainsPoint(leftRect, location)) {
   [player move:b2Vec2(-8, 0)];
   NSLog(@"MOVE LEFT");
   }
   if (CGRectContainsPoint(rightRect, location)) {
   [player move:b2Vec2(8, 0)];
   NSLog(@"MOVE RIGHT");
   }
   return TRUE;
   }

   Posted 10 months ago #
2. 

   Gray Olson
   Member

   Yes, you're using ccTOUCH began, you need to use ccTOUCHESBegan.
   

   - (BOOL) ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
   UITouch *touch = [touches anyObject];
   CGPoint location = [touch locationInView:touch.view];
   location = [[CCDirector sharedDirector] convertToGL:location];
   
   return true;
   }

   that will get you one of the touches. you can also use [touches count] to get the number of touches, and you can look in the documentation if you need more info.

   Hope that helps,
   Gray

   Posted 10 months ago #
3. 

   Tim Knauf
   Member

   It looks like you're setting up your layer to receive targeted (single) touches rather than standard (multitouch) ones.

   Your subclass declaration will need to indicate that it uses the CCStandardTouch protocol:

   @interface MyTouchLayer : CCLayer <CCStandardTouchDelegate> {
   }
   
   @end

   Then its 'onEnter' method will need to look something like this:

   - (void)onEnter {
       [super onEnter];
       [[CCTouchDispatcher sharedDispatcher] addStandardDelegate:self priority:0];
   }

   And then you'll supply a method like so (instead of ccTouchBegan):

   - (void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
       // Do something with the set of touches here.
   }

   Hope that helps!

   Posted 10 months ago #
4. 

   NeilB
   Member

   Thanks for the pointers guys, apparently I am using the correct function:

   - (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event

   I just needed this in my app delegate.

   [glView setMultipleTouchEnabled:YES];

   Then each touch is passed separately to ccTouchBegan.

   Posted 10 months ago #

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