ios - Spritekit 添加粒子

Question

我想让我的宇宙飞船有一条跟随它的粒子轨迹。我该怎么做？

这是我的宇宙飞船的代码:

override func didMove(to view: SKView) {
    spaceS.position = CGPoint(x: self.frame.width / 2, y: self.frame.height / 2)
    spaceS.setScale(0.05)
    spaceS.zPosition = 1

    addChild(spaceS)

}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {

        for touch in touches {
            let location = touch.location(in: self)
            spaceS.position = CGPoint(x: location.x, y: location.y)
        }


}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
               for touch in touches {
            let location = touch.location(in: self)
            spaceS.position = CGPoint(x: location.x, y: location.y)
        }


}

编辑 1:更准确的火粒子轨迹

Answer 1

首先你需要创建一个 SpriteKit Particle File按 命令 + n 在键盘上和来自 iOS 下的模板-> Resources -> 选择 SpriteKit Particle File点击 Next并选择 particle template至 fire按下一步并为 SpriteKit Particle File 命名这将创建一个 yourFileName.sks 文件到您的项目。

使用以下代码:

override func didMove(to view: SKView) {

    spaceS = SKSpriteNode(imageNamed: "Spaceship")
    spaceS.position = CGPoint(x: self.frame.width / 2, y: self.frame.height / 2)
    spaceS.setScale(0.50)
    spaceS.zPosition = 1

    addChild(spaceS)

    let emitter = SKEmitterNode(fileNamed: "MyParticle") //MyParticle is the name of the sks file.
    emitter?.position = CGPoint(x: 0, y: -spaceS.size.height)
    emitter?.zPosition = 1
    spaceS.addChild(emitter!) //Now the emitter is the child of your Spaceship.      
}

输出: