Question

我尝试允许用户使用硬币购买节点，然后在游戏中使用此节点。

我试图设置一些代码来检查节点是否已被触摸/购买过，如果没有，则显示该节点的灰色图像。

此外，如果用户的硬币金额大于整数，则在节点上启用触摸，允许他们购买。

这就是我以前可以用来看看节点是否已经购买/触摸过，如果没有，如果有足够的硬币就可以触摸/购买：

    if UserDefaults.standard.bool(forKey: "ship2") == true{
        let ship2Texture = SKTexture(imageNamed: "ship2.png")
        ship2 = SKSpriteNode(texture: ship2Texture)
        ship2.position = CGPoint(x: self.frame.midX - 150, y: self.frame.midY)
        self.addChild(ship2)
    }else{
        coinImage1 = SKSpriteNode(texture: coinImageTexture)
        coinImage1.position = CGPoint(x: self.frame.midX - 150, y: self.frame.midY + 105)
        coinImage1.zPosition = 1
        self.addChild(coinImage1)

        coinLabel1.fontName = "MarkerFelt-Thin"
        coinLabel1.fontSize = 25
        coinLabel1.fontColor = .black
        coinLabel1.text = "20"
        coinLabel1.position = CGPoint(x: self.frame.midX - 150, y: self.frame.midY + 105)
        coinLabel1.zPosition = 1.1
        self.addChild(coinLabel1)

        let greyship2Texture = SKTexture(imageNamed: "greyship2.png")
        greyship2 = SKSpriteNode(texture: greyship2Texture)
        greyship2.position = CGPoint(x: self.frame.midX - 150, y: self.frame.midY)

        self.addChild(greyship2)
    }

现在这就是我的触摸开始：

 if(atPoint(location) == greyship2) {
       if coinScore > 3 {
            let oldValue = UserDefaults.standard.integer(forKey: "COINSCORE")
            let newValue = oldValue - 20
            UserDefaults.standard.set(newValue, forKey: "COINSCORE")
            UserDefaults.standard.set(true, forKey: "ship2")
        } else {

        }
  }
   if(atPoint(location) == ship2){
        if let scene = GameScene2(fileNamed: "GameScene2") {
             // Set the scale mode to scale to fit the window
             scene.scaleMode = .aspectFill

             // Present the scene
             view!.presentScene(scene, transition: SKTransition.doorway(withDuration: 1.2));    
            }
    }

唯一的问题是，当用户有足够的硬币并接触到greyship2时，它不会检查初始代码。我必须重新启动coinScore的应用程序，减少20，并使彩色船实际出现。

我已尝试将第一部分代码放入更新功能但崩溃了。

Answer 1

看起来好像您在购买后没有更新UI。您正在更改UserDefaults值，因此下次运行时它将显示正确的精灵。但是你需要做的是在购买后更新用户界面，因为根据你的UserDefaults值选择精灵的代码不会再次运行。如果你的第一段代码在一个函数中，那么你可以在购买之后调用该函数。

最好在更改值后调用UserDefaults.standard.synchronize()，以便立即将其写入磁盘。

试试这个

if(greyship2.contains(location)) {
    if coinScore > 3 {
        let oldValue = UserDefaults.standard.integer(forKey: "COINSCORE")
        let newValue = oldValue - 20

        UserDefaults.standard.set(newValue, forKey: "COINSCORE")
        UserDefaults.standard.set(true, forKey: "ship2")
        UserDefaults.standard.synchronize()

        //Now it has been brought update the UI and other necessary things

        //If the code is in a function call it

        //updateUI()

        //else change the sprites

        //Remove the grey ship
        greyship2.setScale(0)
        greyship2.removeFromParent()

        //create the new ship and add it to the scene
        let ship2Texture = SKTexture(imageNamed: "ship2.png")
        ship2 = SKSpriteNode(texture: ship2Texture)
        ship2.position = CGPoint(x: self.frame.midX - 150, y: self.frame.midY)
        ship2.setScale(1)
        self.addChild(ship2)
        break //finish the touchesbegan call
     }
}

if(ship2.contains(location)) {
        if let scene = GameScene2(fileNamed: "GameScene2") {
             // Set the scale mode to scale to fit the window
             scene.scaleMode = .aspectFill

             // Present the scene
             view!.presentScene(scene, transition: SKTransition.doorway(withDuration: 1.2));    
        }
}

希望这有帮助

检查UserDefaults的值并创建IF语句

1 个答案: