我有一个SKNode,它是一个加载条。这个条应该从右到左缩小。为了实现这个目的,我使用了以下代码:
let loadBarNode = self.childNodeWithName("loadBar")
if loadBarNode != nil{
let countdown = SKAction.scaleXTo(0, duration: 3)
loadBarNode?.runAction(countdown)
}
当我运行这段代码时,会出现以下情况:
![What happens when code runs.](https://istack.dev59.com/fzIRu.gif)
![It's supposed to look like this.](https://istack.dev59.com/vYGEK.gif)