enabling multi touch... need help with storing the 2nd touch - cocoa-touch

Question

need to be able to store 2 touches, how I go about this i how no idea...
this is how I'm doing a single touch
- (void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
/////checks whether the screen has been touched and stores its location and converts the coordinates to be avaible for use////
UITouch* myTouch = [touches anyObject];
CGPoint locationLeft = [myTouch locationInView: [myTouch view]];
locationLeft = [[CCDirector sharedDirector]convertToGL:locationLeft];
how would I be able to store the 2nd touch?
Thanks in advance

Answer 1

You should use ccTouchBegan (notice the singular 'touch' instead of 'touches') when you need to handle multi-touches. (IMO people should just ditch the ccTouchesBegan/Moved/Ended and just use ccTouchBegan/Moved/Ended).
Each of ccTouchBegan/Moved/Ended is called for each touch which mean you can easily differentiate between multiple touches. Example:
- (void)registerWithTouchDispatcher {
[[CCTouchDispatcher sharedDispatcher] addTargetedDelegate:self priority:1 swallowsTouches:YES];
}
- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event {
if (self.firstTouch == nil) {
// we got the first touch
self.firstTouch = touch;
}
else if (self.secondTouch == nil) {
// we got the second touch
self.secondTouch = touch;
}
// return YES to consume the touch (otherwise it'll cascade down the layers)
return YES;
}
- (void)ccTouchMoved:(UITouch *)touch withEvent:(UIEvent *)event {
if (touch == self.firstTouch) {
// we got the first touch
// do stuff
}
else if (touch == self.secondTouch) {
// we got the second touch
// do stuff
}
}
- (void)ccTouchEnded:(UITouch *)touch withEvent:(UIEvent *)event {
if (touch == self.firstTouch) {
// first touch ended so remove both touches
self.firstTouch = nil;
self.secondTouch = nil;
}
else if (touch == self.secondTouch) {
// second touch ended so remove touch only
self.secondTouch = nil;
}
}

Answer 2

Have you tried iterating through the touches like this?
for (UITouch *touch in touches){
CGPoint location = [touch locationInView:[touch view]];
location = [[CCDirector sharedDirector] convertToGL:location];
location = [self convertToNodeSpace:location];