我在sceneKit视图中添加了一个自定义按钮.触摸时,它会播放动画,表示已单击.我面临的问题是用户触摸和动画开始之间的延迟.我的场景有28.1K三角形和84.4K顶点.是那么多,还是我需要以不同的方式实现按钮.场景渲染为60fps.我通过sceneView.addSubview添加了按钮：谢谢你的回答
viewDidLoad(){
// relevant code
starButton = UIButton(type: UIButtonType.Custom)
starButton.frame = CGRectMake(100,100,50,50)
starButton.setImage(UIImage(named: "yellowstar.png"),forState: UIControlState.Normal)
sceneView.addSubview(starButton)
starButton.addTarget(self,action: "starButtonClicked",forControlEvents: UIControlEvents.TouchUpInside)
starButton.adjustsImageWhenHighlighted = false
}
func starButtonClicked(){
animateScaleDown()
}
func animateScaleDown(){
UIView.animateWithDuration(0.1,animations: {
self.starButton.transform = CGAffineTransformMakeScale(0.8,0.8)
},completion: { _ in
self.wait()
})
}
func wait(){
UIView.animateWithDuration(0.2,animations: {},completion: { _ in
UIView.animateWithDuration(0.2,animations: {
self.starButton.transform = CGAffineTransformMakeScale(1,1)
})
})
}
