Removing a child, then re-adding it back after a countdown.

cocos2d for iPhone » Programming » cocos2d support (graphics engine)

Removing a child, then re-adding it back after a countdown.

(5 posts) (4 voices)

Started 9 months ago by Dynex
Latest reply from Birkemose

Tags:

Dynex
Member
This is my code:
```
if (countTime == 20)
	{
		[self removeChild:starMenu cleanup:YES];
		shootIntervalLevel = 5;
		[self schedule:@selector(shootCountDown:) interval:1.0f];
	}
```
```
- (void)shootCountDown:(ccTime)dt {
	shootIntervalLevel--;
	if (shootIntervalLevel == 0)
	{
		[self addChild:starMenu];
		[self unschedule:@selector(shootCountDown:)];
	}
}
```
I remove a child (menu) after a countdown, and try adding it back again when the time is up. Problem is, it won't re-add after the time is expired. It removes it fine, but it doesn't seem to want to come back.

I get this error in console: *** Assertion failure in -[GameScene addChild:z:tag:], /Users/markdas/Documents/BasicGame/libs/cocos2d/CCNode.m:360, which points to
```
NSAssert( child.parent == nil, @"child already added. It can't be added again");
```
It's being removed first, so why am I getting this error?
Posted 9 months ago #
alexasha
Member

You should use .visible instead.

Posted 8 months ago #
Dynex
Member

Awesome that works too, but it still be nice to know why removing child then re-adding didn't work. Thanks alexasha

Posted 8 months ago #

cocos
Member

Posted code looks ok. shootCountDown scheduler is unscheduled. It is a mystery.

- (void)shootCountDown:(ccTime)dt {
	shootIntervalLevel--;
	if (shootIntervalLevel == 0)
	{
		[self addChild:starMenu];
		[self unschedule:@selector(shootCountDown:)];
                 shootIntervalLevel = 5; // block it new
	}
}

Is there any chance that 'shootCountDown' is scheduled twice?

Posted 8 months ago #

Birkemose
Moderator

Probably because starMenu only is retained by the container, and when you remove it, it goes POOF.

Posted 8 months ago #

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