Maintaining a list of all active UITouch'es

[ironfish8]

Hi,

I need to maintain a list of all active UITouches (sorted).

touchesBegan/Ended/Moved appear to be called at random intervals and each have a list of different touches in different phases (not all relative to the function name).

My idea is to maintain an NSMutableDictionary.

touchesBegan:
Add to the list (if the [touch hash]) doesnt already exist. (And the phase is began)

touchesEnd:
Remove from the list (if the [touch hash]) exists. (And the phase is ended)

touchesMoved
Update (?) the UITouch. However the UITouch pointers will be valid? Or will they have been released, i.e. Should I maintain my own allocated list of UITouches and copy over the data for each time we recieved touchesMoved?



Thanks for clarifying!


Ashley.

[fiftysixty]

The pointers should remain the same for the lifetime of a UITouch object, though it does somehow feel risky to make that assumption when the documentation doesn't explicitly state it. But that's they way Apple's own example codes handle tracking individual UITouch objects, so it should be ok. By the way, you could also take a look at Cocos2D as they have implemented some touch object handling stuff there, it might be useful for you.