swift - 生成多个 SKSpriteNode

Question

所以我正在制作一个非常像四个正方形的游戏，除了在选择一个正方形之前你有 20 个 Sprite 要放置。在执行正方形决策之前，我只需要有关如何通过点击屏幕 20 次(每次都是不同的 Sprite )来添加多个不同的 Sprite 的帮助。到目前为止，我的代码只适用于一个 Sprite ，但会立即决定选择哪个方 block 。如果有人可以提供帮助，我们将不胜感激!

import SpriteKit
import GameplayKit

class GameScene: SKScene {
    var character:SKSpriteNode!
    var count:Int = 0
    var number:Int!
    var countDownLabel:SKLabelNode!
    var scoreLabel:SKLabelNode!
    var loss:Int = 0
    var score:Int = 0 {
        didSet {
            scoreLabel.text = "Score: \(score)"
        }
    }

    override func didMove(to view: SKView) {
        character = SKSpriteNode()
        scoreLabel = SKLabelNode(text: "Score: 0")
        scoreLabel.position = CGPoint(x: 300, y: 620)
        scoreLabel.fontSize = 36
        scoreLabel.fontColor = .black
        self.addChild(scoreLabel)
    }

    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
        let  touch = touches.first!
        let location = touch.location(in: self)
        character = SKSpriteNode(imageNamed: "shuttle")
        character.position = location
        self.addChild(character)

        number = Int(arc4random_uniform(4)+1)

        if (location.x < 0 && location.y > 0 && number == 1){
            character.removeFromParent()
            print("you lose")
            loss += 1
        } else if (location.x > 0 && location.y > 0 && number == 2){
            character.removeFromParent()
            print("you lose")
            loss += 1
        } else if (location.x < 0 && location.y < 0 && number == 3){
            character.removeFromParent()
            print("you lose")
            loss += 1
        } else if (location.x > 0 && location.y < 0 && number == 4){
            character.removeFromParent()
            print("you lose")
            loss += 1
        } else {
            print("you win")
            score += 1
    }

}

Answer 1

问题是您正在定义一个单个 character 节点，如下所示:

var character:SKSpriteNode!

要获得 20 个 Sprite ，您可以做的是用这样的东西代替:

import SpriteKit
import GameplayKit

class GameScene: SKScene {
    var count:Int = 0
    var number:Int!
    var countDownLabel:SKLabelNode!
    var scoreLabel:SKLabelNode!
    var loss:Int = 0
    var score:Int = 0 {
        didSet {
            scoreLabel.text = "Score: \(score)"
        }
    }

    override func didMove(to view: SKView) {
        scoreLabel = SKLabelNode(text: "Score: 0")
        scoreLabel.position = CGPoint(x: 300, y: 620)
        scoreLabel.fontSize = 36
        scoreLabel.fontColor = .black
        self.addChild(scoreLabel)
    }

    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
        count = count + 1
        let touch = touches.first!
        let location = touch.location(in: self)
        let character = SKSpriteNode()
        character.name = "character\(count)
        character = SKSpriteNode(imageNamed: "shuttle")
        character.position = location
        self.addChild(character)

        number = Int(arc4random_uniform(4)+1)

        if (location.x < 0 && location.y > 0 && number == 1){
            character.removeFromParent()
            print("you lose")
            loss += 1
        } else if (location.x > 0 && location.y > 0 && number == 2){
            character.removeFromParent()
            print("you lose")
            loss += 1
        } else if (location.x < 0 && location.y < 0 && number == 3){
            character.removeFromParent()
            print("you lose")
            loss += 1
        } else if (location.x > 0 && location.y < 0 && number == 4){
            character.removeFromParent()
            print("you lose")
            loss += 1
        } else {
            print("you win")
            score += 1
    }

}

如果您需要再次访问字符，请执行以下操作:

let number = //the id of the character you want to access
if let character = self.childNode(withName: "character\(number)") {
    //enter code here
}

希望对您有所帮助!如果有任何需要澄清的地方，请发表评论。

我是 stackoverflow 的新手，所以如果我的格式不完美，我深表歉意。