Question

我想添加SKSpriteNodes并将它们随机放置在具有特定时间间隔的场景中。然后我希望在特定时间后删除这些节点。

问题在于移除不起作用。

我尝试在SKAction.sequence中使用removeFromParent（），但代码未执行。

如何在特定时间后删除SKSpriteNodes？

import SpriteKit

class GameScene: SKScene {

override func didMoveToView(view: SKView) {
    runAction(SKAction.repeatActionForever(
        SKAction.sequence([
            SKAction.runBlock(placeFruit),
            SKAction.waitForDuration(1.0)
            ])))
}

func placeFruit() {

    let fruit = SKSpriteNode(imageNamed: "apple")
    fruit.position = CGPoint(x: frame.size.width * random(min: 0, max: 1), y: frame.size.height * random(min: 0, max: 1))

    addChild(fruit)

    runAction(
        SKAction.sequence([
            SKAction.waitForDuration(1.0),
            SKAction.removeFromParent()
            ]))
}

override func update(currentTime: CFTimeInterval) {
}

func random() -> CGFloat {
    return CGFloat(Float(arc4random()) / 0xFFFFFFFF)
}

func random(#min: CGFloat, max: CGFloat) -> CGFloat {
    return random() * (max - min) + min
}

}

Answer 1

您正在self而不是fruit节点上运行序列操作。

只需更改您的功能：

func placeFruit() {

    let fruit = SKSpriteNode(imageNamed: "apple")
    fruit.position = CGPoint(x: frame.size.width * random(min: 0, max: 1), y: frame.size.height * random(min: 0, max: 1))

    addChild(fruit)

    fruit.runAction(
        SKAction.sequence([
            SKAction.waitForDuration(1.0),
            SKAction.removeFromParent()
        ])
    )

}

Answer 2

func makeSpriteNode () {
  var spriteNodelabel        = SKSpriteNode(imageNamed: "imagename")
  spriteNodelabel.position   = CGPoint(x:CGRectGetMidX(frame), y: frame.size.height*0.90)
  spriteNodelabel.size       = CGSizeMake(frame.size.width*0.70, frame.size.height*0.06)
  spriteNodelabel.alpha      = 0.2
  //Position of SpriteNode
  spriteNodelabel.zPosition  = 21.0
  self.addChild(spriteNodelabel)
  //Action to remove SpriteNode
  spriteNodelabel.runAction(
    SKAction.sequence([
        //Here we define Time duration in With SpriteNode remove!
        SKAction.waitForDuration(1.0),
        SKAction.removeFromParent()
        ])
  )
}

使用此功能创建SKSpriteNode！它将在1秒延迟后删除！

如何在特定时间后删除SKSpriteNodes

2 个答案: