導致遞歸的Scalafx動畫計時器：可以避免這種情況嗎？

Question

我想製作一個使用類AnimationTimer來處理它的遊戲。我的代碼的摘要看起來是這樣的：

主類

object Game extends JFXApp{ 

    def showMenu{ 
     //code that show the .fxml layout and controller will handle the controller 
    } 

    def showInstruction{ 
     //code that show the .fxml instruction 
    } 

    def showGame():Unit = { 
     this.roots.center = { 
      new AnchorPane(){ 
       children = new Group(){ 

        val timer:AnimationTimer = AnimationTimer(t=> { 
         //game code 

         if(playerDie){ 
          timer.stop 
          val gameOver:AnimationTimer = AnimationTimer(t => { 
           if(exitPressed){ 
            showMenu 
           } else if (restartPressed){ 
            restartGame 
           } 
          }) 
          gameOver.start 
         } 
        }) 
        timer.start 
       } 
      } 
     } 
    } 

    def restartGame(){ 
     //show restart layout 
    } 

    showMenu() 
} 

RestartController

@sfxml 
class RestartController(private val countDownLabel:Label){ 
    var lastTimer:Double = 0 
    var countDownSec:Double = 5.999 
    val countDown:AnimationTimer = AnimationTimer(t => { 
     val delta = (t-lastTimer)/1e9 
     if(delta < 1) countDownSec -= delta 
     countDownLabel.text = countDownSec.toInt.toString 
     if(countDownSec <= 0) { 
      countDown.stop 
      Game.showGame 
     } 
     lastTimer = t 
    })//end AnimationTimer pauseTimer 
    countDown.start 

    //I think Game.showGame should be located at here but tried several ways still can't implement it 

} 

我有一些變量如位於某個類的遊戲關卡伴隨對象，所以我想避免遞歸，因爲如果遞歸它將導致關卡的結果不一致。

當玩家死了，如果用戶退出，用戶將顯示菜單，並且如果玩家再次按下開始遊戲，則它不會顯示伴侶對象中的這些變量的任何不一致。

但是，如果玩家按下重啓後，將進入遞歸的，這意味着該方法調用另一個方法，因此舊的方法並沒有結束，並說，如果我做這樣的事情

ShootingGame.level += 1 //be trigger when certain requirement meet 

有時將+ = 2甚至更多

是否有任何解決方案，使其不遞歸，其行爲完全一樣，當我退出遊戲和舊的showGame（）方法將完全結束之前，我開始一個新的？

Answer 1

不要回調相同的功能，而是我reini tialize整個程序，其如下所示：

射擊遊戲

class ShootingGame{ 
    def restart:ListBuffer[Circle] = { 
     var toBeRemove:ListBuffer[Circle] 

     //initialize and add those needed to be remove into toBeRemove 

     toBeRemove 
    } 
} 

主類

對象遊戲延伸JFXApp {

def showMenu{ 
     //code that show the .fxml layout and controller will handle the controller 
    } 

    def showInstruction{ 
     //code that show the .fxml instruction 
    } 

    def showGame():Unit = { 
     this.roots.center = { 
      new AnchorPane(){ 
       children = new Group(){ 

        val timer:AnimationTimer = AnimationTimer(t=> { 
         //game code 

         if(playerDie){ 
          timer.stop 
          val gameOver:AnimationTimer = AnimationTimer(t => { 
           if(exitPressed){ 
            showMenu 
           } else if (restartPressed){ 
            for(i <- game.restart) children.remove(i) 
            timer.start 
           } 
          }) 
          gameOver.start 
         } 
        }) 
        timer.start 
       } 
      } 
     } 
    } 

    showMenu() 
} 

Answer 2

我從前沒有回調到相同的功能解決了這個問題，而不是我重新初始化整個程序，如下圖所示：

ShootingGame

class ShootingGame{ 
    def restart:ListBuffer[Circle] = { 
     var toBeRemove:ListBuffer[Circle] 

     //initialize and add those needed to be remove into toBeRemove 

     toBeRemove 
    } 
} 

主類

object Game extends JFXApp{ 

    def showMenu{ 
     //code that show the .fxml layout and controller will handle the controller 
    } 

    def showInstruction{ 
     //code that show the .fxml instruction 
    } 

    def showGame():Unit = { 
     this.roots.center = { 
      new AnchorPane(){ 
       children = new Group(){ 

        val timer:AnimationTimer = AnimationTimer(t=> { 
         //game code 

         if(playerDie){ 
          timer.stop 
          val gameOver:AnimationTimer = AnimationTimer(t => { 
           if(exitPressed){ 
            showMenu 
           } else if (restartPressed){ 
            for(i <- game.restart) children.remove(i) 
            timer.start 
           } 
          }) 
          gameOver.start 
         } 
        }) 
        timer.start 
       } 
      } 
     } 
    } 

    showMenu() 
}