懸停DPAD有時會使角色無限地向一個方向移動

Question

當玩家按住時，我有一個DPAD在我們的遊戲中讓我們說左側DPAD，如果他將他的觸摸移動到Up DPAD，讓我們走，玩家繼續進入左方向。

它也適用，如果你持有一個方向，讓我們說繼續持有，但移動UP DPAD，有時你可能會繼續沿着這個方向前進。

我一直在努力，防止這種情況：

• 方向上點擊，是否你在運動中，或 已經去一個不同的方向
• 設置衝突，迫使這些變量來觸發檢查變得虛假;又名， 你碰到東西，inMotion = false等

這就是我所能想到的關於如何解決這個問題。

另外，我使用了很多變量來進行檢查，更改我的函數返回布爾值，還是這樣好？只是好奇。

遊戲類

package 
{ 
    import flash.display.MovieClip; 
    import flash.utils.Timer; 
    import flash.events.TimerEvent; 

    public class Game extends MovieClip 
    { 
     public var area1:Boolean = true; 
     public var area2:Boolean = false; 
     public var area3:Boolean = false; 

     public var player1:Boolean = true; 
     public var player2:Boolean = false; 

     public var upWalkspeed:Number = -5; 
     public var downWalkspeed:Number = 5; 
     public var leftWalkspeed:Number = -5; 
     public var rightWalkspeed:Number = 5; 

     public var inMotion:Boolean = false; 
     public var goingUp:Boolean = false; 
     public var goingDown:Boolean = false; 
     public var goingLeft:Boolean = false; 
     public var goingRight:Boolean = false; 

     public var playerPosKeeper_mc:MovieClip = new mc_PlayerPosKeeper(); 

     public var up_dpad:MovieClip = new dpad_Up(); 
     public var down_dpad:MovieClip = new dpad_Down(); 
     public var left_dpad:MovieClip = new dpad_Left(); 
     public var right_dpad:MovieClip = new dpad_Right(); 
     public var menu_dpad:MovieClip = new dpad_Menu(); 
     public var run_dpad:MovieClip = new dpad_Menu(); 

     public var barrierRoof1_game:MovieClip = new game_BarrierRoof(); 
     public var barrierRoof2_game:MovieClip = new game_BarrierRoof(); 
     public var barrierSide1_game:MovieClip = new game_BarrierSide(); 
     public var barrierSide2_game:MovieClip = new game_BarrierSide(); 

     public var StageCollisions:Array = new Array(barrierRoof1_game, barrierRoof2_game, barrierSide1_game, barrierSide2_game); 
     // fix MC goes after not before ||| public var player1States:Array = new Array(mc_P1D1,mc_P1D2,"mc_P1L1","mc_P1L2","mc_P1R1","mc_P1R2","mc_P1U1","mc_P1U2"); 

     public function Game() 
     { 
      trace("SUCCESS | Constructed Game Class"); 

      var aMove:Movement = new Movement(this); 
      addChild(aMove); 

     } 
    } 
} 

運動類

package 
{ 
    import flash.display.Stage; 
    import flash.display.MovieClip; 
    import flash.events.Event; 
    import flash.events.TouchEvent; 
    import flash.net.dns.AAAARecord; 
    import flash.ui.Multitouch; 
    import flash.ui.MultitouchInputMode; 


    public class Movement extends MovieClip 
    { 
     public function Movement(main:Game) 
     { 
      trace("SUCCESS | Constructed Movement Class"); 

      addChild(main.playerPosKeeper_mc); 
      main.playerPosKeeper_mc.x = 384; 
      main.playerPosKeeper_mc.y = 46; 

      addChild(main.up_dpad); 
      main.up_dpad.x = 55; 
      main.up_dpad.y = 336; 

      addChild(main.down_dpad); 
      main.down_dpad.x = 57; 
      main.down_dpad.y = 432; 

      addChild(main.left_dpad); 
      main.left_dpad.x = 19; 
      main.left_dpad.y = 372; 

      addChild(main.right_dpad); 
      main.right_dpad.x = 118; 
      main.right_dpad.y = 372; 

      addChild(main.menu_dpad); 
      main.menu_dpad.x = 61; 
      main.menu_dpad.y = 377; 

      addChild(main.run_dpad); 
      main.run_dpad.x = 684; 
      main.run_dpad.y = 369; 

      addChild(main.barrierRoof1_game); 
      main.barrierRoof1_game.x = 0; 
      main.barrierRoof1_game.y = 0; 

      addChild(main.barrierRoof2_game); 
      main.barrierRoof2_game.x = 0; 
      main.barrierRoof2_game.y = 470; 

      addChild(main.barrierSide1_game); 
      main.barrierSide1_game.x = 0; 
      main.barrierSide1_game.y = 0; 

      addChild(main.barrierSide2_game); 
      main.barrierSide2_game.x = 790; 
      main.barrierSide2_game.y = 0; 

      Multitouch.inputMode = MultitouchInputMode.TOUCH_POINT; 

      main.up_dpad.addEventListener(TouchEvent.TOUCH_BEGIN, upBeginInput); 
      main.down_dpad.addEventListener(TouchEvent.TOUCH_BEGIN, downBeginInput); 
      main.left_dpad.addEventListener(TouchEvent.TOUCH_BEGIN, leftBeginInput); 
      main.right_dpad.addEventListener(TouchEvent.TOUCH_BEGIN, rightBeginInput); 

      // Maybe add diagnol direction buttons in the future?; 


      // !! NOTE !! 
      // Use some sort of value, maybe a return or a variable to sync up animations 
      // to if the player is moving, in the future 

      // Movement Directions 

      // Start of UP Movement 
      function upBeginInput(e:TouchEvent):void 
      { 
       main.inMotion = true; 
       main.goingUp = true; 
       main.goingDown = false; 
       main.goingLeft = false; 
       main.goingRight = false; 
       main.up_dpad.addEventListener(TouchEvent.TOUCH_END, upEndInput); 
       addEventListener(Event.ENTER_FRAME,sendUpMovement); 
      } 
      function upEndInput(e:TouchEvent):void 
      { 
       main.inMotion = false; 
       main.goingUp = false; 
       main.up_dpad.removeEventListener(TouchEvent.TOUCH_END, upEndInput); 
       removeEventListener(Event.ENTER_FRAME,sendUpMovement); 
      } 
      function sendUpMovement():void 
      { 
       if (main.inMotion == true && main.goingUp == true && main.goingDown == false && main.goingLeft == false && main.goingRight == false) 
       { 
        movePlayer(0, main.upWalkspeed); 
       } 
       else 
       { 
       } 
      } 
      // End of UP Movement 



      // Start of DOWN Movement 
      function downBeginInput(e:TouchEvent):void 
      { 
       main.inMotion = true; 
       main.goingUp = false; 
       main.goingDown = true; 
       main.goingLeft = false; 
       main.goingRight = false; 
       main.down_dpad.addEventListener(TouchEvent.TOUCH_END, downEndInput); 
       addEventListener(Event.ENTER_FRAME,sendDownMovement); 
      } 
      function downEndInput(e:TouchEvent):void 
      { 
       main.inMotion = false; 
       main.goingDown = false; 
       main.down_dpad.removeEventListener(TouchEvent.TOUCH_END, downEndInput); 
       removeEventListener(Event.ENTER_FRAME,sendDownMovement); 
      } 
      function sendDownMovement():void 
      { 
       if (main.inMotion == true && main.goingUp == false && main.goingDown == true && main.goingLeft == false && main.goingRight == false) 
       { 
        movePlayer(0, main.downWalkspeed); 
       } 
       else 
       { 
       } 
      } 
      // End of DOWN Movement 



      // Start of LEFT Movement 
      function leftBeginInput(e:TouchEvent):void 
      { 
       main.inMotion = true; 
       main.goingUp = false; 
       main.goingDown = false; 
       main.goingLeft = true; 
       main.goingRight = false; 
       main.left_dpad.addEventListener(TouchEvent.TOUCH_END, leftEndInput); 
       addEventListener(Event.ENTER_FRAME,sendLeftMovement); 
      } 
      function leftEndInput(e:TouchEvent):void 
      { 
       main.inMotion = false; 
       main.goingLeft = false; 
       main.left_dpad.removeEventListener(TouchEvent.TOUCH_END, leftEndInput); 
       removeEventListener(Event.ENTER_FRAME,sendLeftMovement); 
      } 
      function sendLeftMovement():void 
      { 
       if (main.inMotion == true && main.goingUp == false && main.goingDown == false && main.goingLeft == true && main.goingRight == false) 
       { 
        movePlayer(main.leftWalkspeed, 0); 
       } 
       else 
       { 
       } 
      } 
      // End of LEFT Movement 



      // Start of RIGHT Movement 
      function rightBeginInput(e:TouchEvent):void 
      { 
       main.inMotion = true; 
       main.goingUp = false; 
       main.goingDown = false; 
       main.goingLeft = false; 
       main.goingRight = true; 
       main.right_dpad.addEventListener(TouchEvent.TOUCH_END, rightEndInput); 
       addEventListener(Event.ENTER_FRAME,sendRightMovement); 
      } 
      function rightEndInput(e:TouchEvent):void 
      { 
       main.inMotion = false; 
       main.goingRight = false; 
       main.right_dpad.removeEventListener(TouchEvent.TOUCH_END, rightEndInput); 
       removeEventListener(Event.ENTER_FRAME,sendRightMovement); 
      } 
      function sendRightMovement():void 
      { 
       if (main.inMotion == true && main.goingUp == false && main.goingDown == false && main.goingLeft == false && main.goingRight == true) 
       { 
        movePlayer(main.rightWalkspeed, 0); 
       } 
       else 
       { 
       } 
      } 
      // End of RIGHT Movement 


      function movePlayer(movementX:Number, movementY:Number):void 
      { 
       var originalX:Number = main.playerPosKeeper_mc.x; 
       var originalY:Number = main.playerPosKeeper_mc.y; 
       main.playerPosKeeper_mc.x += movementX; 
       if (checkCollision()) 
       { 
        main.playerPosKeeper_mc.x = originalX; 
       } 
       main.playerPosKeeper_mc.y += movementY; 
       if (checkCollision()) 
       { 
        main.playerPosKeeper_mc.y = originalY; 
       } 
      } 

      function checkCollision():Boolean 
      { 
       for each (var StageCollisions:MovieClip in main.StageCollisions) 
       { 
        if (main.playerPosKeeper_mc.hitTestObject(StageCollisions)) 
        { 
         return true; 
         main.inMotion = false; 
         main.goingUp = false; 
         main.goingDown = false; 
         main.goingLeft = false; 
         main.goingRight = false; 
        } 
       } 
       return false; 
      } 
     } 
    } 
} 

Answer 1

之前，你甚至開始調試行爲，你需要了解算法方法是什麼。您有4個類似的代碼段，它們在小細節上有所不同，並且使您的整個腳本過長，難以理解且難以管理。這裏的方針：

var isMoving:Boolean; 
var Direction:Point = new Point; 
var Buttons:Array = [Up, Down, Left, Right]; 

// Subscribe all buttons for the same handlers and behaviors. 
for each (var aButton:InteractiveObject in Buttons) 
{ 
    aButton.addEventListener(MouseEvent.MOUSE_DOWN, onDown); 
    aButton.addEventListener(MouseEvent.MOUSE_OUT, onUp); 
    aButton.addEventListener(MouseEvent.MOUSE_UP, onUp); 
} 

function onDown(e:MouseEvent):void 
{ 
    // Figure which button was pressed. 
    switch (e.currentTarget) 
    { 
     case Up: 
      Direction.x = 0; 
      Direction.y = -1; 
      break; 

     case Down: 
      Direction.x = 0; 
      Direction.y = 1; 
      break; 

     case Left: 
      Direction.x = -1; 
      Direction.y = 0; 
      break; 

     case Up: 
      Direction.x = 1; 
      Direction.y = 0; 
      break; 
    } 

    // Now start moving Hero into the Direction. 
    if (!isMoving) 
    { 
     isMoving = true; 
     addEventListener(Event.ENTER_FRAME, onFrame); 
    } 
} 

function onFrame(e:Event):void 
{ 
    Hero.x += Direction.x; 
    Hero.y += Direction.y; 
} 

function onUp(e:MouseEvent):void 
{ 
    // If any of buttons is released or mouse out, stop moving Hero. 
    removeEventListener(Event.ENTER_FRAME, onFrame); 

    Direction.x = 0; 
    Direction.y = 0; 

    isMoving = false; 
} 

正如你所看到的，算法方法的妙處在於，你需要不同的處理只事情需要進行不同處理，在本例的情況下（這是非常相似到你想要創建的）它是設置移動方向的塊。其餘代碼對於所有按鈕都是相同的，這就是爲什麼整個腳本短而易讀，易於理解和管理。