Swift 4.2 iOS 11.x使用游乐场
尝试在操场上制作一个简单的太空游戏。我创建了一个spite，并向其中添加了一个物理物体，它从屏幕上掉了下来。大。但是我不知道如何影响效果。我不能放慢它，加快它，停止它。.
+-------------------+
| Stack *S |
+-------------------+
| int no_ele = 3 | +-------------------------+
| Node *top -+ | +-> | Node |
+-------------|-----+ | +-------------------------+
| | | StackEntryType data = 2 | +-------------------------+
| | | struct node *Next ----|--> | Node |
| | +-------------------------+ +-------------------------+
| | | StackEntryType data = 1 |
| | | struct node *Next = 0 |
+-----------------+ +------+ +-------------------------+
| |
| +-------------------------+ |
+-> | Node | |
+-------------------------+ |
| StackEntryType data = 3 | |
| struct node *Next ----|---+
+-------------------------+
....
import PlaygroundSupport
import SpriteKit
class GameScene: SKScene {
var animator: UIDynamicAnimator?
var player: SKSpriteNode!
override func didMove(to view: SKView) {
player = SKSpriteNode(imageNamed: "player_frame1")
self.addChild(player)
我只是做错了所有事...