如何使cocos2d精灵每秒上下调节(用于脉动效果)？

Question

我希望每秒钟上下调整一次精灵比例,使它看起来像是鼓胀和脉动.我怎样才能做到这一点？

Answer 1

由于之前的帖子包含语法错误.更准确地说,我发布了工作代码:

CCSprite * sprite = ...; // create the sprite.
id scaleUpAction =  [CCEaseInOut actionWithAction:[CCScaleTo actionWithDuration:1 scaleX:1.0 scaleY:1.0] rate:2.0];
id scaleDownAction = [CCEaseInOut actionWithAction:[CCScaleTo actionWithDuration:0.5 scaleX:0.8 scaleY:0.8] rate:2.0];
CCSequence *scaleSeq = [CCSequence actions:scaleUpAction, scaleDownAction, nil];
[sprite runAction:[CCRepeatForever actionWithAction:scaleSeq]];

Answer 2

您可以使用简单的 [CCScaleTo ..] 操作，或者如果您想创建自己的“效果”，您可以提前 CCFiniteTimeAction。我更喜欢第一个：

CCSprite * sprite = ...; // create the sprite.
sprite.anchorPoint = ccp( 0.5, 0.5 ); center the pivot
id myAction = [CCRepeatForEver actionWithActions:[CCScaleTo actionWithDuration:0.5 scaleX:2.0 ScaleY:2.0],[CCScaleTo actionWithDuration:0.5 scaleX:0.5 ScaleY:0.5], nil];
[sprite runAction:myAction];

使用CCEase使动画非线性

id myAction = [CCRepeatForEver actionWithActions:[CCEaseInOut actionWithAction:[CCScaleTo actionWithDuration:0.5 scaleX:2.0 ScaleY:2.0] rate:2.0],[CCEaseInOut actionWithAction:[CCScaleTo actionWithDuration:0.5 scaleX:0.5 ScaleY:0.5] rate:2.0], nil];

这篇文章可能包含错误。但我希望你了解实现目标的方法。