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？

这是我的飞船代码：

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：更准确地说是火焰粒子轨迹

Answer 1

首先，您需要通过在键盘上按 command + n 并从iOS 下的模板中创建SpriteKit Particle File -> Resources -> 选择@ 987654326@ 点击Next 并选择particle template 到fire 按下一步并为SpriteKit Particle File 命名，这将为您的项目创建一个yourFileName.sks 文件。

使用下面的代码：

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：