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Hello,
Sorry for the Topic "spam" I'm doing here lately, I'm kinda new to cocos2d and I'm trying to learn.
Anyways... I was wondering about nodes, If I create Sprite nodes whenever the user touches the screen, do I need to release the node? As from what I understand most of cocos2d methods return auto released objects, but if I create a node should I eventually call:
-(void) removeChild: (CocosNode*)node cleanup:(BOOL)cleanup;
????
Codemattic
Moderator
"do I need to release the node?"
Most likely no. Post an example of what you are doing and we can say for sure.
"but if I create a node should I eventually call: -(void) removeChild:"
If you want the node to leave the animation and not come back, yes. You do not have to call -removeChild if you remove the node/Layer/Scene containing it.
Some code; I'll explain first:
I have a bullet Sprite which has a file of it's own and I manage things in my GameLayer, every time there's a touch event, I calculate speed and direction and I check within the sprite if it's out of the screen, if it is - a BOOL property is changed to YES.
I'm trying to iterate the children array of self for sprites of bullet, like so:
[self schedule:@selector(checkIfOut:)];
....
- (BOOL)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
CGPoint loc = [touch locationInView:[touch view]];
loc = [[Director sharedDirector] convertCoordinate:loc];
Bullet *object = [Bullet node];
CGPoint pos = ccp(160.0, 24.0);
object.position = pos;
CGPoint velocity = ccp(loc.x - object.position.x, loc.y - object.position.y);
CGPoint direction = ccpNormalize(velocity);
velocity = ccpMult(direction, kSpeed);
object.velocity= velocity;
[self addChild:object];
return kEventHandled;
}
- (void)checkIfOut:(ccTime)dt {
for(Bullet *b in [self children]){
if(b.outOfScreen){
[self removeChild:b cleanup:YES];
}
}
}But this gives me an error, as it gets into the for loop at any given time, even if there was no touch event.
Edit: Maybe I should use an NSMutableArray to store references to the Sprite objects and check the property, and remove the object, afterwards releasing it... This code works if there's one sprite on screen:
- (void)checkIfOut:(ccTime)dt {
for(Bullet *b in bulletArray){
if(b.outOfScreen){
[bulletArray removeObject:b];
[self removeChild:b cleanup:YES];
}
}
}The problem seems to be in the [self removechild...]; call, it says the NSCFArray was being mutated while being enumrated...
Anyone?
I managed to solve the problem, FPS at constant of 60, array gets cleaned and children aswell...
This is what I use:
.....
[self schedule:@selector(checkIfOut:)];
........
- (void)checkIfOut:(ccTime)dt {
NSMutableArray *arrayToRemove = [[NSMutableArray alloc] init];;
for(int i = 0 ; i < [bulletArray count] ; i++){
Bullet *b = [bulletArray objectAtIndex:i];
if(b.outOfScreen){
[arrayToRemove addObject:b];
[self removeChild:b cleanup:YES];
NSLog(@"%i", [[self children] count]);
}
b = nil;
}
[bulletArray removeObjectsInArray:arrayToRemove];
[arrayToRemove release];
}EDIT: Thanks newAcct I maganged to figure it out eventually on my own lol...
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