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我有一艘船根據加速度計改變的重力方向移動,但我希望它只沿着屏幕寬度移動(我已經知道如何做到這一點),但我不知道如何將它保持在固定的水平線上。這裏是我的代碼如何將加速度計編碼爲固定的x位置
class GameScene: SKScene {
var manager = CMMotionManager()
var ship = SKSpriteNode()
override func didMoveToView(view: SKView) {
/* Setup your scene here */
let shipTexture = SKTexture(imageNamed: "EvadersShipVert2.png")
ship = SKSpriteNode(texture: shipTexture)
ship.position = CGPoint(x: CGRectGetMidX(self.frame), y: CGRectGetMidY(self.frame) - 250)
ship.size = CGSize(width: 90, height: 115)
shipTexture.filteringMode = SKTextureFilteringMode.Nearest
ship.zPosition = 2
ship.physicsBody = SKPhysicsBody(texture: shipTexture, size: CGSize(width: 90, height: 115))
ship.physicsBody?.dynamic = true
self.addChild(ship)
manager.startAccelerometerUpdates()
manager.accelerometerUpdateInterval = 0.1
manager.startAccelerometerUpdatesToQueue(NSOperationQueue.mainQueue()) {
(data, error) in
self.physicsWorld.gravity = CGVectorMake(CGFloat((data?.acceleration.x)!), CGFloat((data?.acceleration.y)!))
}
}
在此先感謝!
船仍下落的屏幕,它只是不加速度計的迴應y軸。 –
我更新了答案,把它弄錯了 – Luke