How to reverse scaling animation « cocos2d for iPhone

How to reverse scaling animation

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alex
Member

Hi!
I have added the following command when a sprite appears onscreen:

[[self getByTag:Sprite] do: [ScaleBy actionWithDuration:1.0 scale: 1.5]];

I wanted the sprite to scale back to its original size so I added the following line after:

[[self getByTag:Sprite] do: [ScaleTo actionWithDuration:0.3 scale:1.0]];

The sprite does not scale back to its original sizewhen it appears for the first time but each time it appears again it is scaled by 1.5 exponentially and then scales back to its original size.

What am I doing wrong?

Thanks :-)

-alex

Posted 2 years ago #
Clain
Member

What you're doing wrong :
- you use ScaleBy instead of ScaleTo
- you use deprecated API like getByTag and do (what cocos version are you using ?)

Posted 2 years ago #
alex
Member

Its a tutorial using cocos2d v0.6.2.
How are the commands different in 0.8?

Posted 2 years ago #
Clain
Member

In v0.7.3 and v0.8, getByTag is getChildByTag (add and remove are addChild and removeChild) and do is now runAction.

Posted 2 years ago #

natanavra
Member

You could create a reverseAction:

id action1 = [ScaleTo actionWithDuration:1.0 scale:1.5];
id action2 = [action1 reverse]; // something like this, don't have mac at hand

Posted 2 years ago #

Clain
Member

@natanavra :
No you couldn't, for 2 reasons :
1) ScaleTo doesn't support the reverse method (and that's normal because there's no ivar in the ScaleTo class to remember the scale value at the beginning of the action). ScaleBy can be reversed.
2) alex wants the scale back action to have a different duration.

Posted 2 years ago #
pravin
Member

Hi ,
I am using cocos-2d 0.8.
I have added following code to scale the Sprite
id scale1 = [ScaleBy actionWithDuration:0.5 scale:2.4] ;
[ShieldSprite runAction:scale1] ;
How to set the sprite to its original size after scaling?

Posted 1 year ago #

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