ios - 快速图像堆叠/复制 - iOS

Question

我最近开始编码，我的第一次尝试是一款 iOS 游戏，我正在开发的游戏的一部分具有以下元素。

滚动前景和背景点击时会跳跃的猫一枚导弹从天而降。

我最近设法每隔几秒生成一次导弹，但是这样做我认为我搞砸了一些东西。

现在我有两个错误，第一个是猫、前景和背景图像在屏幕上复制和堆叠，另一个是 override func update(currentTime) 下的构建错误。I'已经注释掉了猫的 Z 轴旋转，否则游戏将无法构建。

如果有人能帮我解决问题，我将不胜感激。

抱歉，如果它太过分了，但这是代码......

import SpriteKit

class GameScene: SKScene, SKPhysicsContactDelegate {


var cat = SKSpriteNode()
var crow = SKSpriteNode()
var crowTexture1 = SKTexture()
var skyColor = SKColor()
var moveAndRemoveCrow = SKAction()
var spawn = SKAction()
var lastMissileAdded : NSTimeInterval = 0.0

let missileVelocity : CGFloat = 5.0



override func didMoveToView(view: SKView) {

    self.addMissile()

}


func addMissile() {
    // Initializing missile node
    var missile = SKSpriteNode(imageNamed: "red-missile")
    missile.setScale(0.15)

    // Adding SpriteKit physics body for collision detection
    missile.physicsBody = SKPhysicsBody(rectangleOfSize: missile.size)
    //      missile.physicsBody?.categoryBitMask = UInt32(obstacleCategory)
    missile.physicsBody?.dynamic = true
    //      missile.physicsBody?.contactTestBitMask = UInt32(shipCategory)
    missile.physicsBody?.collisionBitMask = 0
    missile.physicsBody?.usesPreciseCollisionDetection = true
    missile.name = "missile"

    // Selecting random y position for missile
    var random : CGFloat = CGFloat(arc4random_uniform(300))
    missile.position = CGPoint(x: self.frame.size.width / 1.8, y: self.frame.size.height / 1.2 )
    self.addChild(missile)
}

func moveObstacle() {
    self.enumerateChildNodesWithName("missile", usingBlock: { (node, stop) -> Void in
        if let obstacle = node as? SKSpriteNode {
            obstacle.position = CGPoint(x: obstacle.position.x - self.missileVelocity, y: obstacle.position.y)
            if obstacle.position.x < 0 {
                obstacle.removeFromParent()
            }
        }
    })


    skyColor = SKColor(red:113.0/255.0, green:197.0/255.0, blue:207.0/255.0, alpha:1.0)
    self.backgroundColor = skyColor

    var catTexture1 = SKTexture(imageNamed: "Cat1")
    catTexture1.filteringMode = SKTextureFilteringMode.Nearest
    var catTexture2 = SKTexture(imageNamed: "Cat2")
    catTexture2.filteringMode = SKTextureFilteringMode.Nearest

    var anim = SKAction.animateWithTextures([catTexture1, catTexture2], timePerFrame: 0.2)
    var run = SKAction.repeatActionForever(anim)

    cat = SKSpriteNode(texture: catTexture1)
    cat.position = CGPoint(x: self.frame.size.width / 2.2, y: self.frame.size.height / 7.0 )
    cat.runAction(run)

    cat.physicsBody = SKPhysicsBody(circleOfRadius: cat.size.height / 2.0)
    cat.physicsBody!.dynamic = true
    cat.physicsBody!.allowsRotation = false

    self.addChild(cat)


    var groundTexture = SKTexture(imageNamed: "Ground")
    groundTexture.filteringMode = SKTextureFilteringMode.Nearest

    var moveGroundSprite = SKAction.moveByX(-groundTexture.size().width, y: 0, duration: NSTimeInterval(0.01 * groundTexture.size().width))
    var resetGroundSprite = SKAction.moveByX(groundTexture.size().width, y: 0, duration: 0.0)
    var moveGroundSpritesForever = SKAction.repeatActionForever(SKAction.sequence([moveGroundSprite,resetGroundSprite]))

    for var i:CGFloat = 0; i < 2 + self.frame.size.width / ( groundTexture.size().width); ++i {
        var sprite = SKSpriteNode(texture: groundTexture)
        sprite.position = CGPointMake(i * sprite.size.width, sprite.size.height / 2)
        sprite.runAction(moveGroundSpritesForever)
        self.addChild(sprite)

    }

    var dummy = SKNode()
    dummy.position = CGPointMake(0, groundTexture.size().height / 2)
    dummy.physicsBody = SKPhysicsBody(rectangleOfSize: CGSizeMake(self.frame.size.width, groundTexture.size().height))
    dummy.physicsBody!.dynamic = false
    self.addChild(dummy)

    var skylineTexture = SKTexture(imageNamed: "Skyline")
    skylineTexture.filteringMode = SKTextureFilteringMode.Nearest

    var moveSkylineSprite = SKAction.moveByX(-skylineTexture.size().width, y: 0, duration: NSTimeInterval(0.1 * skylineTexture.size().width))
    var resetSkylineSprite = SKAction.moveByX(skylineTexture.size().width, y: 0, duration: 0.0)
    var moveSkylineSpritesForever = SKAction.repeatActionForever(SKAction.sequence([moveSkylineSprite,resetSkylineSprite]))

    for var i:CGFloat = 0; i < 2 + self.frame.size.width / ( skylineTexture.size().width); ++i {
        var sprite = SKSpriteNode(texture: skylineTexture)
        sprite.zPosition = -20;
        sprite.position = CGPointMake(i * sprite.size.width, sprite.size.height / 2 + groundTexture.size().height)
        sprite.runAction(moveSkylineSpritesForever)
        self.addChild(sprite)
    }

}

override func  touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
    /* Called when a touch begins */

    cat.physicsBody!.velocity = CGVectorMake(0, 0)
    cat.physicsBody!.applyImpulse(CGVectorMake(0, 15))

}

func clamp(min: CGFloat, max: CGFloat, value: CGFloat) -> CGFloat {
    if( value > max ) {
        return max;
    } else if( value < min ) {
        return min;
    } else {
        return value;
    }

}
override func update(currentTime: CFTimeInterval) {
    /* Called before each frame is rendered */
    //       cat.zRotation = self.clamp( -1, max: 0.5, value: cat.physicsBody!.velocity.dy * ( cat.physicsBody!.velocity.dy < 0 ? 0.003 : 0.001 ) );
    if currentTime - self.lastMissileAdded > 1 {
        self.lastMissileAdded = currentTime + 1
        self.addMissile()
    }

    self.moveObstacle()
}


}

Answer 1

我已经明白了，

我在“didMoveToView”中有函数。将它们移出 block 后，代码现在可以顺利运行。