Question

我正在使用SpriteKit在横向模式下为iPhone创建无尽的跑步者。我是这样设置场景的：

override func viewDidLayoutSubviews() {

    let scene = GameScene(size: CGSize(width: 812, height: 375))
    let skView = view as! SKView
    scene.backgroundColor = UIColor.red
    scene.scaleMode = .aspectFill
    skView.presentScene(scene)
    skView.showsFPS = true
    skView.showsNodeCount = true
    print("Screen Size: \(GlobalProperties.screenSize.width) x \(GlobalProperties.screenSize.height)")
    print("Scene Size: \(scene.size.width) x \(scene.size.height)")


}

我想对播放器进行定位，以使播放器边缘和屏幕右边缘之间的像素数量相同，而与纵横比无关。这是维护设备之间困难的合理做法吗？我有这样的布局设置：

 override func didMove(to view: SKView) {

    let player = SKSpriteNode(texture: SKTexture(imageNamed: "CuteMelon"))
    player.anchorPoint = CGPoint(x: 0.5, y: 0.5)
    player.position = CGPoint(x: frame.width - 600, y: frame.midY)
    self.addChild(player)

    let rect = SKSpriteNode(color: .orange, size: CGSize(width: 550, height: 200))
    rect.anchorPoint = CGPoint(x: 1, y: 0.5)
    rect.position = CGPoint(x: frame.width-50, y: frame.height/2)
    self.addChild(rect)
}

我添加了矩形，以查看两种情况下播放器是否都距右侧600像素（留出50像素的间隙，以确保播放器不会超出边缘）

结果如下：

iPhone XR：https://imgur.com/y6OYHkK可以正常工作

iPhone 8：https://imgur.com/nkrx5By并未将矩形放置在距框架右边界50个像素的位置。

我该怎么做才能解决此问题，或者应该完全采用另一种方式解决它？谢谢

Answer 1

只需弄清楚场景尺寸和屏幕尺寸之间的差异，然后将相机移动该距离的一半即可。公式abs((sceneWidth - screenWidth * sceneHeight/screenHeight)/2)可以帮助您。这样做是将屏幕缩放到场景的任何高度，然后从宽度减去两个差值并返回该值的一半。

 override func didMove(to view: SKView) {
    let widthPadding = abs((self.frame.width - (UIScreen.main.bounds.width *  self.frame.height / UIScreen.main.bounds.height )) / 2)
    self.camera = self.camera ?? SKCameraNode()

    self.camera.position.x += widthPadding

    let player = SKSpriteNode(texture: SKTexture(imageNamed: "CuteMelon"))
    player.anchorPoint = CGPoint(x: 0.5, y: 0.5)
    player.position = CGPoint(x: frame.width - 600, y: frame.midY)
    self.addChild(player)

    let rect = SKSpriteNode(color: .orange, size: CGSize(width: 550, height: 200))
    rect.anchorPoint = CGPoint(x: 1, y: 0.5)
    rect.position = CGPoint(x: frame.width-50, y: frame.height/2)
    self.addChild(rect)
}

无尽的转轮重定位播放器，无论纵横比如何，难度均相等

1 个答案: