Detecting touches on empty layer « cocos2d for iPhone

Detecting touches on empty layer

(3 posts) (2 voices)

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jjkiesch
Member
I have a layer that doesn't not contain any sprites or anything. I've set isTouchEnabled to YES and have - (void)registerWithTouchDispatcher and - (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event methods in my layer.

My first guess was that the content size was probably too small since there wasn't anything in it, so I also put this in my init method:
```
CGSize size = [[CCDirector sharedDirector] winSize];
[self setContentSize:size];
```
I put a simple log function in the touchbegan to just output "touch began" but I never see the message showing up. Any ideas why?
Posted 1 year ago #
chrisco
Member
The content size shouldn't matter - you can actually register a non-CCNode object as a CCTargetedTouchDelegate, so it doesn't even have to be something added to your scene, as long as it's a valid object and you're calling this code somewhere:
```
[[CCTouchDispatcher sharedDispatcher] addTargetedDelegate:self priority:0 swallowsTouches:FALSE];
```
If you're calling that code in your -onEnter method, doublecheck that the layer is actually being added to your scene.

You might also want to make sure there isn't another layer with higher priority swallowing the touches before they ever get to your empty layer.
Posted 1 year ago #
jjkiesch
Member

wow - rookie mistake!

sure enough, the layer wasn't even being added. adding it in fixed the problem. thanks

Posted 1 year ago #

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