使用SKEffectNode添加模糊的FPS问题

Question

如果有更好的方法创造一个模糊的效果？这似乎是我目前的做法，它创造了FPS问题，特别是在旧手机。似乎blurAmount越高，FPS越低。blendMode会是这里的原因吗？

        if effectsNode.parent == nil {
            let filter = CIFilter(name: "CIGaussianBlur")
            let blurAmount = 15.0
            filter!.setValue(blurAmount, forKey: kCIInputRadiusKey)

            effectsNode.filter = filter
            effectsNode.blendMode = .add

            sceneContent.removeFromParent()
            effectsNode.addChild(sceneContent)
            addChild(effectsNode)
        }

当我暂停游戏时，我调用blurScreen()，它执行上面的代码。然而，我的fps似乎随着时间的推移，游戏暂停的时间越长。我试着把blurScreen()去掉，FPS的问题就消失了。当只调用一次blurScreen()时，FPS是如何随时间下降的呢？

编辑：

func pauseGame() {
    sceneContent.isPaused = true
    intermission = true

    physicsWorld.speed = 0

    blurScreen()
} 

以下是touchesEnded()中的代码

// Tapped pause or pause menu options
if name == "pause" && touch.tapCount == 1 && pauseSprite.alpha == 1.0 && ((!sceneContent.isPaused && !GameData.shared.midNewDay) || (!sceneContent.isPaused && sceneElements[0].editingMode)) {
                    SKTAudio.sharedInstance.pauseBackgroundMusic()
                    SKTAudio.sharedInstance.playSoundEffect("Sounds/pause.wav")

                   pauseSprite.run(SKAction.sequence([SKAction.scale(to: 1.2, duration: 0.10), SKAction.scale(to: 1.0, duration: 0.10)])) { [unowned self] in
                        self.createPauseMenu()
                        self.pauseGame()
                    }

                    return
                }

更新方法

override func update(_ currentTime: TimeInterval) {
    if GameData.shared.firstTimePlaying && GameData.shared.distanceMoved > 600 && !step1Complete {
        tutorial2()
    }

    // Check for game over
    if GameData.shared.hearts == 0 && !gameEnded {
        gameOver()
    }

    // If we're in intermission, do nothing
    if intermission || sceneContent.isPaused {
        return
    }

    // some more stuff unrelated to pausing
}

Answer 1

你在整个场景上运行一个效果节点，这个场景将呈现出每个框架的效果，这将给你的系统带来大量的工作。如果后面没有动画，我建议通过这样做将效果节点转换为sprite节点。

var spriteScene : SKSpriteNode!
func blurScreen() { 
    DispatchQueue.global(qos: .background).async { 
        [weak self] in
        guard let strongSelf = self else { return }
        let effectsNode = SKEffectNode() 

        let filter = CIFilter(name: "CIGaussianBlur") 
        let blurAmount = 10.0 
        filter!.setValue(blurAmount, forKey: kCIInputRadiusKey) 

        effectsNode.filter = filter 
        effectsNode.blendMode = .add 

        strongSelf.sceneContent.removeFromParent() 
        effectsNode.addChild(strongSelf.sceneContent) 

        let texture = self.view!.texture(from: effectsNode) 
        strongSelf.spriteScene = SKSpriteNode(texture: texture) 
        strongSelf.spriteScene.anchorPoint = CGPoint(x: 0.5, y: 0.5) 

        DispatchQueue.main.async { 
            strongSelf.sceneContent.removeFromParent() 
            strongSelf.addChild(strongSelf.spriteScene) 
        } 
    } 
}