ios - 为什么我的玩家在 SpriteKit 中倾斜时不移动？

Question

我正在尝试使用倾斜屏幕的选项来移动我的播放器。所以我按照 Ray Wenderlich 和他的太空入侵者教程的指示进行操作。我似乎无法弄清楚为什么我的播放器在倾斜屏幕时没有从左向右移动。

请看一下它来帮助我。

import SpriteKit
import CoreMotion

enum BodyType: UInt32 {
case player = 2
case enemy = 3
}
let motionManager = CMMotionManager()

class GameScene: SKScene, SKPhysicsContactDelegate {

let points = SKLabelNode(text: "0")

let gamePlayerSize = CGSize(width: 30, height: 16)
let gamePlayerName = "gameplayer"


override func didMove(to view: SKView) {


//SET UP FRAME
physicsBody = SKPhysicsBody(edgeLoopFrom: frame)

//SETTING UP Player
func setupPlayer() {
    // 1
    let player = makePlayer()

    // 2
    player.position = CGPoint(x: 240, y: 28)
    addChild(player)
}

func makePlayer() -> SKNode {
    let player = SKSpriteNode(imageNamed: "block")
    player.name = gamePlayerName

    // 1
    player.physicsBody = SKPhysicsBody(rectangleOf: player.frame.size)

    // 2
    player.physicsBody!.isDynamic = true

    // 3
    player.physicsBody!.affectedByGravity = false

    // 4
    player.physicsBody!.mass = 0.02


    return player
}

setupPlayer()

motionManager.startAccelerometerUpdates()

//score label
let points = SKLabelNode(text: "0")
points.position = CGPoint(x: 280, y: 510)
points.fontColor = UIColor.black
points.fontSize = 50
addChild(points)

// setting border around game
let borderBody = SKPhysicsBody(edgeLoopFrom: self.frame)
borderBody.friction = 0
self.physicsBody = borderBody

//ENEMY SETTINGS START

//repeat enemy spawning
run(SKAction.repeatForever(
    SKAction.sequence([
        SKAction.run(spawnEnemy),
        SKAction.wait(forDuration: 1.0)])))

}
//Enemy settings
func random() -> CGFloat {
    return CGFloat(Float(arc4random()) / 0xFFFFFFFF)
}

func random(min: CGFloat, max: CGFloat) -> CGFloat {
    return random() * (max - min) + min
}

//spawn enemies
func spawnEnemy() {
    // 2
    let enemy = SKSpriteNode(imageNamed: "ball")
    // 3
    enemy.name = "enemy"
    // 4
    enemy.position = CGPoint(x: frame.size.width * random(min: 0, max: 1), y: frame.size.height + enemy.size.height/2)
    // 5
    addChild(enemy)

    enemy.run(
        SKAction.moveBy(x: 0.0 , y: -size.height - enemy.size.height,
                        duration: TimeInterval(random(min: 1, max: 2))))

//ENEMY SETTINGS END

    func processUserMotion(forUpdate currentTime: CFTimeInterval) {
        // 1
        if let player = childNode(withName: gamePlayerName) as? SKSpriteNode {
            // 2
            if let data = motionManager.accelerometerData {
                // 3
                if fabs(data.acceleration.x) > 0.2 {
                    // 4 How do you move the ship?
                    player.physicsBody!.applyForce(CGVector(dx: 40 * CGFloat(data.acceleration.x), dy: 0))
                }
            }
        }
    }


 func update(_ currentTime: TimeInterval) {
    processUserMotion(forUpdate: currentTime)
}
    }  }

Answer 1

您是否意外嵌套了您的方法？看看你的代码似乎是这样。

您检查过运动代码是否确实被调用了吗？

这样的东西应该有效

 class GameScene: SKScene {

     let motionManager = CMMotionManager()

     override func didMove(to view: SKView) {
         // setup player etc
         motionManager.startAccelerometerUpdates()
     } 

     func update(_ currentTime: TimeInterval) {
          processUserMotion(forUpdate: currentTime)
     }
}

另外作为提示，在使用物理体时我会使用选项(？)而不是强制展开它们(!)。如果在某个时刻变为零强制展开时会崩溃。

例如

player.physicsBody?.affectedByGravity = false

希望这有帮助