CMMotionManager 倾斜以左右移动节点 Swift 4

Question

我有一个名为 Balloon 的单独 SKNode class，位于下方。

import Foundation
import SpriteKit

class Balloon: SKNode {
    init(image: SKSpriteNode) {
        super.init()

        let atlas = SKTextureAtlas(named: "balloons")
        var textureArray = [SKTexture]()

        self.physicsBody = SKPhysicsBody(texture: SKTexture(imageNamed: "red_balloon1"), size: CGSize(width: image.size.width, height: image.size.height))
        self.physicsBody?.affectedByGravity = false
        self.physicsBody?.categoryBitMask = balloonCategory
        self.physicsBody?.contactTestBitMask = floorCategory
        self.physicsBody?.collisionBitMask = floorCategory

        self.position = CGPoint(x: 0, y: -UIScreen.main.bounds.height / 2)
        self.zPosition = 1

        for i in 1...atlas.textureNames.count {
            let Name = "red_balloon\(i).png"
            textureArray.append(SKTexture(imageNamed: Name))
        }

        image.run(SKAction.repeatForever(SKAction.animate(with: textureArray, timePerFrame: 0.1, resize: false, restore: true)))

        self.addChild(image)
    }

    // Enables the ability to drag the ballon along the x axis
    func move(touchLocation: CGPoint) {
        if self.calculateAccumulatedFrame().contains(touchLocation) {
            self.position.y = touchLocation.y
            self.position.x = touchLocation.x
        }
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

然后我在我的 GameScene 中使用这个 class，如下所示。

    let balloon = Balloon(image: SKSpriteNode(imageNamed: "red_balloon1"))


    override func didMove(to view: SKView) {
            self.addChild(balloon)
    }

    override func update(_ currentTime: TimeInterval) {
            if let accelerometerData = motionManager.accelerometerData {
                balloon.physicsBody?.velocity = CGVector(dx: accelerometerData.acceleration.y * 50, dy: accelerometerData.acceleration.x * 50)
       }
}

基本上我基本上想做的是在纵向模式下使用应用程序并向左或向右平铺以移动节点，无论我如何倾斜 iPhone。以下是我在 Objective C 天内使用的内容，但我不确定这些天 Swift 4 的情况如何，或者是否有更好的东西。希望我提供了足够的信息以获得一些提示和任何帮助！

#define BALLOON 25

    -(void)startAccelerometerData {
        motionManager = [[CMMotionManager alloc] init];
        motionManager.accelerometerUpdateInterval = 1/60.0;
        [motionManager startAccelerometerUpdatesToQueue:[NSOperationQueue currentQueue] withHandler:^(CMAccelerometerData *accelerometerData, NSError *error) {

          valueX = accelerometerData.acceleration.x*26.0;

            newX = (balloon.center.x +valueX);
            if (newX > 320-BALLOON)
                newX = 320-BALLOON;
            else if (newX < 0+BALLOON)
                newX = 0+BALLOON;

            balloon.center = CGPointMake(newX, balloon.center.y);
    } ];
    }

Answer 1

没关系，我明白了。

if let accelerometerData = motionManager.accelerometerData {
            if UIDevice.current.orientation == UIDeviceOrientation.landscapeLeft {
                balloon.physicsBody?.velocity = CGVector(dx: accelerometerData.acceleration.x * -500.0, dy: 0)
            } else {
                balloon.physicsBody?.velocity = CGVector(dx: accelerometerData.acceleration.x * 500.0, dy: 0)
            }
        }

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