如何从图书馆播放移动图片，并按下按键

Question

即时通讯按下按钮即可从图书馆播放移动图片，而且我已将其与图片链接起来，但仍然无效（这只是一小部分代码有事件侦听器和处理程序到位，角色移动罚款）

stage.addEventListener(Event.ENTER_FRAME, Move); 
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyPress); 
stage.addEventListener(KeyboardEvent.KEY_UP, keyUp); 

var aP:Boolean = false; 
var dP:Boolean = false; 
//creating a new Character_right instance 
var character_right:Character_right = new Character_right(); 

function Move(vet:KeyboardEvent) 
{ 
    if(aP) 
    { 
     char.x -= 5; 
     char.scaleX = -0.55; 
    } 
    if(dP) 
    { 
     char.x += 5; 
     char.scaleX = -0.55; 
    } 
} 

function keyPress(evt:KeyboardEvent) 
{ 
    switch(evt.keyCode) 
    { 
     case Keyboard.A: 
     { 
     aP = true; 
     break; 
     } 
     case Keyboard.D: 
     { 
     dP = true; 
     character_right.play(); 
     break; 
     } 
    } 
} 

function keyUp(evt:KeyboardEvent) 
{ 
     switch(evt.keyCode) 
    { 
     case Keyboard.A: 
     { 
     aP = false; 
     break; 
     } 
     case Keyboard.D: 
     { 
     dP = false; 
     break; 
     } 
    } 
} 

Answer 1

检查this post，与有关键盘事件的一个很好的教程中，我相信将是重要的，你理解的概念，并在你的逻辑实现。

简而言之就像下面的例子，但记住要为你的范围实现所有必要的逻辑。

 var isRight:Boolean; 
     var isLeft:Boolean; 
     var isUp:Boolean; 
     var isDown:Boolean; 
     //creating a new Character_right instance 
     var character_right:Character_right = new Character_right(); 

     stage.addEventListener(KeyboardEvent.KEY_DOWN, downKeyHandler, false, 0, true); 
     function downKeyHandler(event:KeyboardEvent):void 
     { 
      if (event.keyCode == Keyboard.RIGHT) 
      { 
       isRight = true; 
      } 
      if (event.keyCode == Keyboard.LEFT) 
      { 
       isLeft = true; 
      } 
      if (event.keyCode == Keyboard.UP) 
      { 
       isUp = true; 
      } 
      if (event.keyCode == Keyboard.DOWN) 
      { 
       isDown = true; 
      } 
     } 

     stage.addEventListener(KeyboardEvent.KEY_UP, upKeyHandler, false, 0, true); 
     function upKeyHandler(event:KeyboardEvent):void 
     { 
      if (event.keyCode == Keyboard.RIGHT) 
      { 
       isRight = false; 
      } 
      if (event.keyCode == Keyboard.LEFT) 
      { 
       isLeft = false; 
      } 
      if (event.keyCode == Keyboard.UP) 
      { 
       isUp = false; 
      } 
      if (event.keyCode == Keyboard.DOWN) 
      { 
       isDown = false; 
      } 
     } 

     stage.addEventListener(Event.ENTER_FRAME, loopHandler, false, 0, true); 
     function loopHandler(event:Event):void 
     { 
      if (isRight) 
      { 
       //do something here… 
            character_right.play(); 
          } 
      if (isLeft) 
      { 
       //do something here... 
      } 
      if (isUp) 
      { 
       //do something here... 
      } 
      if (isDown) 
      { 
       //do something here... 
      } 
     } 

Answer 2

在代码中，你break后执行功能Character_right.play()和休息停止从正在执行的循环代码的休息，所以break之前执行Character_right.play()，例如：

function keyPress(evt:KeyboardEvent) 
{ 
    switch(evt.keyCode) 
    { 
     case Keyboard.A: 
     { 
     aP = true; 

     break; 
     } 
     case Keyboard.D: 
     { 
     dP = true; 
     Character_right.play(); 
     break; 
     } 
    } 
}