Swift Playground 中的 SceneKit 粒子系统 [英] SceneKit Particle Systems in a Swift Playground

问题描述

通常我使用这样的文件初始值设定项来实例化 SCNParticleSystems:

Usually I instantiate SCNParticleSystems by using the file initializer like this:

var stars = SCNParticleSystem(named: "Stars.sncp", inDirectory: nil)

但是，这个项目需要一个 Swift Playground，当我尝试将该 init 函数与存储在 Playground 的 Resources 文件夹中的系统一起使用时，它返回 nil(即使我将指定的目录更改为Resources"或/Resources"等).)

However this project requires a Swift Playground and when I try to use that init function with systems stored in the playground's Resources folder it returns nil (even if I change the specified directory to "Resources" or "/Resources" etc. etc. ).

Playground 资源路径的处理方式是否与普通应用程序不同，还是我犯了一个非常愚蠢的文件命名错误?

Are Playground resource paths handled differently to normal apps or am I making a really stupid filenaming mistake?

推荐答案

我认为您在文件扩展名方面做错了.它是 .scnp 而不是 .sncp.

I think you're doing a mistake in filename extension. It is .scnp and not .sncp.

要么尝试不使用任何扩展名 -

Either try without any extension -

var stars =  SCNParticleSystem(named: "Stars", inDirectory: nil)

或尝试使用正确的扩展名 -

or try with correct extension -

var stars =  SCNParticleSystem(named: "Stars.scnp", inDirectory: nil)

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