ios - SKAction scaleBy : duration: SpriteKit

我在尝试使用 [SKAction scaleBy: duration:] 制作一个大圆圈和小圆圈时遇到了麻烦

SKAction *scaleDown = [SKAction scaleBy:0.2 duration:1.8];
SKAction *scaleUp= [scaleDown reversedAction];
SKAction *fullScale = [SKAction sequence:@[scaleDown, scaleUp, scaleDown, scaleUp]];
[_circleChanging runAction:fullScale];

我得到的是圆圈变得如此之小以至于消失然后不再回来。它必须变小，然后再做 2 次回到原来的大小。

最佳答案

尝试:

  SKAction *scaleDown = [SKAction scaleTo:0.2 duration:0.75];
       SKAction *scaleUp= [SKAction scaleTo:1.0 duration:0.75];
       SKAction *fullScale = [SKAction repeatActionForever:[SKAction sequence:@[scaleDown, scaleUp, scaleDown, scaleUp]]];
       [_circleChanging runAction:fullScale];

关于ios - SKAction scaleBy : duration: SpriteKit，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/20355564/