为什么我的玩家在倾斜时不会在SpriteKit中移动

Question

我正在尝试使用倾斜屏幕来移动我的播放器的选项。因此，我遵循Ray Wenderlich和他的太空入侵者教程的指示。我似乎无法弄清楚为什么在倾斜屏幕时我的玩家没有从左向右移动。

请看看它可以帮助我。

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

您是否偶然地嵌套了方法？查看您的代码似乎是如此。

您是否检查了运动代码是否被调用？

这样的事情应该起作用

 class GameScene: SKScene {
     let motionManager = CMMotionManager()
     override func didMove(to view: SKView) {
         // setup player etc
         motionManager.startAccelerometerUpdates()
     } 
     func update(_ currentTime: TimeInterval) {
          processUserMotion(forUpdate: currentTime)
     }
}

也作为提示，当使用物理主体而不是强制解开它们时，我会使用optionals（？）（！）。如果它在某一时刻变成零您将在武力解开时崩溃。

例如

player.physicsBody?.affectedByGravity = false

希望这有帮助