我正在嘗試做一些相當簡單的SKShapeNode數學來設置形狀節點的位置。它看起來像這樣: for var i = 0; i < 6; i++ {
var pip: Pip = pips[i]
// set position
let x: CGFloat = tray2.frame.size.width - (i + 1) * pip.frame.size.w
我想在我的場景的中心創建一個橢圓: let center = (CGRectGetMidX(view.scene.frame), CGRectGetMidY(view.scene.frame))
let size = (view.scene.frame.size.width * 0.3, view.scene.frame.size.height * 0.3)
let ellipse = SKS