这个循环我的工作正常,但我想让数组中的图像一个接一个地进入,并且它们之间有一定的特定时间。
if transitionSprite.name == nil || transitionSprite.name == "rd-d2c" || transitionSprite.name == "rd-f2c" {
for (index, roadImage) in cityArrays[randomIndex].enumerated() {
roadSprite = SKSpriteNode(imageNamed: roadImage)
roadSprite.anchorPoint = CGPoint(x: 0.5, y: 0.5)
roadSprite.position = CGPoint(x: 0, y: CGFloat(screenCounter) * roadSprite.size.height)
roadSprite.physicsBody = SKPhysicsBody(rectangleOf: CGSize(width: self.size.width, height: self.size.height))
roadSprite.physicsBody?.categoryBitMask = PhysicsCategory.RoadImageCategory.rawValue
roadSprite.physicsBody?.collisionBitMask = PhysicsCategory.NoCollisionsCategory.rawValue
roadSprite.physicsBody?.contactTestBitMask = PhysicsCategory.BroomCategory.rawValue
roadSprite.physicsBody?.affectedByGravity = false
roadSprite.zPosition = 1
roadSprite.name = "Road \(index)"
// RUNNING THE SKACTION DELAY ON THIS
self.addChild(roadSprite)
addCollectables()
addJerryCans()
if roadImage == "rdc-02_05" {
addBackgroundDetail(detailType: "cityBridge2")
}
screenCounter += 1
}
我已经创建了这个我添加到循环中的SKAction,
loopDelay = SKAction.wait(forDuration: Double(index + 1))
let addRoad = SKAction.run {self.addChild(self.roadSprite)}
let action = SKAction.sequence([loopDelay, addRoad])
self.run(action)
不确定会导致这种情况,但是当我使用SKAction延迟运行它时,我已经创建了它崩溃并给了我这个错误,
Terminating app due to uncaught exception 'NSInvalidArgumentException',
reason: 'Attemped to add a SKNode which already has a parent:
<SKSpriteNode> name:'Road 4' texture:[<SKTexture> 'rdc-02_05' (750 x
1334)] position:{0, 6670} scale:{1.00, 1.00} size:{750, 1334}
anchor:{0.5, 0.5} rotation:0.00'
任何有关延迟会导致此问题的想法?感谢
答案 0 :(得分:0)
您的问题是您使用属性存储roadSprite。因此,在for-in循环的每次迭代中,用新的Sprite替换存储在该属性中的内容。
当每个延迟通过时,他们都会尝试使用相同的Sprite(这是你创建的最后一个)添加孩子,因此它第一次被添加,第二次它给你上面的错误:“试图添加一个SKNode已经拥有父母“。
你想要的是将sprite创建为局部变量,并在SKAction.run闭包中捕获该变量:
select case when ceiling(43546886799090787.89) = floor(43546886799090787.89)
then CONVERT(varchar, CAST(43546886799090787.89 as decimal))
else CONVERT(varchar, 43546886799090787.89)
end
o/p --> 43546886799090787.89
select case when ceiling(43546886799090787.00) = floor(43546886799090787.00)
then CONVERT(varchar, CAST(43546886799090787.00 as decimal))
else CONVERT(varchar, 43546886799090787.00)
end
o/p --> 43546886799090787
如果您仍然希望引用所有这些Sprite,那么您可能应该将它们粘贴到数组中而不是覆盖相同的属性。