swift - 基于随机着色比较两个 Sprite 颜色？

Question

此代码为我的球着色。

var colorize1 = SKAction.colorizeWithColor(.redColor(), colorBlendFactor: 1.0, duration: 0.3)

        var colorize2 = SKAction.colorizeWithColor(.greenColor(), colorBlendFactor: 1.0, duration: 0.3)

        var colorize3 = SKAction.colorizeWithColor(.blueColor(), colorBlendFactor: 1.0, duration: 0.3)

        var actions = [colorize1, colorize2, colorize3]

        var randomIndex = Int(arc4random_uniform(3))

        var action = actions[randomIndex]

        let seconds = 0.14
        let delay = seconds * Double(NSEC_PER_SEC)  // nanoseconds per seconds
        let dispatchTime = dispatch_time(DISPATCH_TIME_NOW, Int64(delay))

        dispatch_after(dispatchTime, dispatch_get_main_queue(), {


            self.Ball.runAction(action)


        })

    }

此代码为我的墙壁着色。

var colorBucket = [UIColor]()

func randomColor() -> UIColor {

    if colorBucket.isEmpty {
        fillBucket()
    }

    let randomIndex = Int(arc4random_uniform(UInt32(colorBucket.count)))
    let randomColor = colorBucket[randomIndex]
    colorBucket.removeAtIndex(randomIndex)
    return randomColor

}

func fillBucket() {
    colorBucket = [UIColor.redColor(), UIColor.greenColor(), UIColor.blueColor()]
}

我需要编写一个 if 语句来检测当我与位于墙壁之间的 spritekitnode() 碰撞时球和墙壁是否具有相同的颜色。

我已经尝试过这些:

if Wall1.color == UIColor.redColor() && Wall2.color == UIColor.redColor() && Ball.color != UIColor.redColor {

died = true

}

我的主要问题是编写 if 语句来确定球和墙壁是否具有相同的颜色。我把碰撞部分放下来了。非常感谢您的帮助。

func didBeginContact(contact: SKPhysicsContact) {


    let firstBody = contact.bodyA
    let secondBody = contact.bodyB




    let ballWasContacted = firstBody.categoryBitMask == PhysicsCat.Ball || secondBody.categoryBitMask == PhysicsCat.Ball
    var wallWasContacted = firstBody.categoryBitMask == PhysicsCat.Wall || secondBody.categoryBitMask == PhysicsCat.Wall
    let scoreWasContacted = firstBody.categoryBitMask == PhysicsCat.Score || secondBody.categoryBitMask == PhysicsCat.Score
    let colorWasContacted = firstBody.categoryBitMask == PhysicsCat.Color || secondBody.categoryBitMask == PhysicsCat.Ball

    if ballWasContacted {
        if scoreWasContacted {
            score += 1
            scoreLbl.text = "\(score)"
            let scoreNode = firstBody.categoryBitMask == PhysicsCat.Score ? firstBody.node : secondBody.node
            scoreNode!.removeFromParent()
        } else if wallWasContacted {
            enumerateChildNodesWithName("wallPair", usingBlock: ({
                (node, error) in
                node.speed = 0
                self.removeAllActions()

                                }))


            if died == false {
                died = true
                createBTN()
                fallDie()
            }
        }
    }

    else if colorWasContacted {


    }

}

colorWasContacted 目前并未真正使用，但其他所有内容都已使用。

更改墙壁颜色的代码。

action = SKAction.colorizeWithColor(randomColor(), colorBlendFactor: 1.0, duration: 0.3)

Wall1.runAction( Action )

这就是我添加断点时发生的情况。

Breakpoints

Answer 1

一次只能与两个元素发生联系，因此您可以在 didBeginContact 中执行类似的操作(根据您的实际代码进行编辑):

...
else if wallWasContacted {
    let sprite1 = firstBody.node as! SKSpriteNode
    let sprite2 = secondBody.node as! SKSpriteNode
    if sprite1.color.isEqual(sprite2.color) {
        // Whatever your heart desires...
    } else {
       // Something else you'd like to have done...
    }

    enumerateChildNodesWithName("wallPair", usingBlock: ({
        (node, error) in
        node.speed = 0
        self.removeAllActions()
    }))

    if died == false {
        died = true
        createBTN()
        fallDie()
    }
}

由于这可能有助于解决这个孤立的问题，我相信(通过查看您的其他线程)您需要重新思考整个逻辑，当涉及到发现在墙壁之间传递时......