我遇到了同样的问题！问题出在这一行...

I have had the same problem! The issue is in this line...

let element = SKSpriteNode(imageNamed: "obsticle1")

SpriteKit不够聪明，不知道已经使用该图像创建了纹理。所以它正在做的是一遍又一遍地创造这种纹理，这是昂贵的。

SpriteKit isn't smart enough to know that a texture was already created with that image. So what it is doing is creating that texture over and over again and that is expensive.

首先在循环外部创建纹理，然后使用纹理创建精灵节点。这样的东西...

Instead create a texture outside of the loop first and then create the sprite node with a texture. Something like this...

let elementTexture = SKTexture(imageNamed: "objstical1")

for i in 0...300 {

    let element = SKSpriteNode(texture: elementTexture)
    element.hidden = true
    obsticle1Pool.append(element)

}

这不仅会快一点，而且还会减少你的应用程序内存。 。假设我遇到了同样的问题。希望这会有所帮助。

Not only will this be a ton faster it will decrease your apps memory a ton...assuming it was the same issue I was having. Hopefully that helps.