cocos2d for iPhone

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

1. 

   jpv123
   Member

   Hello. I want to convert some sprites in buttons, but im not sure how to do it.

   I know how to add Sprites, but not to detect touches in them and then runing an action

   Thanks in advance

   Posted 2 years ago #
2. 

   Greg
   Member

   You need to add code in your touch callback methods to determine where the user is touching in relation to the placement of your sprites. For instance if your sprite is a square, you could quickly check to see if the touch occurs within a rectangle the size of your sprite.

   Posted 2 years ago #
3. 

   jpv123
   Member

   im newbie, so this is kind of difficult to me. Can you post a really quick example please. Maybe is easier to understand like that

   Posted 2 years ago #
4. 

   Greg
   Member

   Here's a sample. Just replace the ractangle bits with the position and size of the sprite you want to act as a button.
   

   - (BOOL) ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
       UITouch *touch = [touches anyObject];
   	if(touch) {
   		CGPoint location = [touch locationInView:[touch view]];
   
   		// touches are always in portrait coordinates, which need to be converted to the current orientation
   		CGPoint convertedPoint = [[Director sharedDirector] convertToGL:location];
   
   		// create rectangle (you can base it on your sprite coordinates)
   		// CGRectMake(x, y, width, height)
   		CGRect rect = CGRectMake(100, 100, 50, 50);
   
   		if (CGRectContainsPoint(rect, convertedPoint)) {
   			return YES;
   		}
   	}
   	return NO;
   }

   Posted 2 years ago #
5. 

   jpv123
   Member

   a question. I have to put in the CGRectContainsPoint method, what i want to happen when the user taps in the sprite?

   Posted 2 years ago #
6. 

   jpv123
   Member

   Okay, it doesnt work. I paste/copy your code, and put an NSLOG()

   Nothing is showing in the console

   Edit: I forgot to put in the init

   self.isTouchEnabled = YES;

   Now it works

   Thanks really

   Happy New Year

   Posted 2 years ago #
7. 

   Greg
   Member

   To answer your question:

   a question. I have to put in the CGRectContainsPoint method, what i want to happen when the user taps in the sprite?

   You would put your "actions" in that if/else block:
   

   ...
   		CGRect rect = CGRectMake(100, 100, 50, 50);
   
   		if (CGRectContainsPoint(rect, convertedPoint)) {
                           // PUT ACTION CODE HERE
   			return YES;
   		}
   ...

   Posted 2 years ago #

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