Flash As3按键问题

Question

好的，所以我的主要问题是，Flash的KeyboardEvent慢了。 可以说我按了向左箭头。 由于某种原因，运动会延迟然后运动。 当我进行两次跳跃或完全跳跃时，我必须按住按钮而不是按一下。 我的问题是闪光灯是否可以检测到任何按键的按动，我该如何解决keyCode的移动延迟？

import flash.ui.Keyboard;
import flash.events.KeyboardEvent;
import flash.events.Event;

//Initialized variables

var theKey:KeyObject = new KeyObject(stage);//Help the stage checks for keypressed objects
var hspeed:Number = 0;// horizontal speed
var vspeed:Number = 0;// vertical speed
var gravity:Number = 2;//Gravity
var friction:Number  = .5;//Friction
var ground:int = 800;//Bottom of the stage
var JumpMax:Number = 0;//Double jump

//All Booleans (Mainly player states)
var aDown:Boolean = false;//Press left key
var dDown:Boolean = false;//Press right key
var Jumped:Boolean = false;//Player in jumping state
var AttackMode:Boolean = false;//Player in attacking state
var CrouchMode:Boolean = false;//Player in crouched state
var RightSide:Boolean = false;//Player hitting right side of block
var LeftSide:Boolean = false;//Player hitting left side of block
var DownSide:Boolean = false;//Player hitting the top of block
var UpSide:Boolean = false;//Player hits bottom of block

ultraDaimyo.gotoAndStop("idleDaimyo");

stage.addEventListener(KeyboardEvent.KEY_DOWN, keyYeet);
function keyYeet(e:KeyboardEvent):void 
{
if(e.keyCode == Keyboard.D)
    {
        dDown = true;

    }
if(e.keyCode == Keyboard.A)
    {
        aDown = true;

    }
if(e.keyCode == Keyboard.C)
  {
    AttackMode = true;

  }
if(e.keyCode == Keyboard.W || Jumped == true)
  {
    Jumped = true;
  }
 }

 stage.addEventListener(KeyboardEvent.KEY_UP, keyNot);
 function keyNot(e:KeyboardEvent):void 
{
if(e.keyCode == Keyboard.D)
 {
    dDown = false; 
 }
if(e.keyCode == Keyboard.A)
 {
    aDown = false; 
 }
if(e.keyCode == Keyboard.C)
 {
    AttackMode = false; 
 }
if(e.keyCode == Keyboard.W)
 {
    Jumped = false; 
 }
 }


 stage.addEventListener(Event.ENTER_FRAME, gameCycle);
 function gameCycle(e:Event):void
{
hspeed *= friction;
ultraDaimyo.x += hspeed;
ultraDaimyo.y += gravity;

if(AttackMode)
      {
        ultraDaimyo.gotoAndStop("attackDaimyo");
        ultraDaimyo.x += 5;
        if(ultraDaimyo.scaleX == -1)
          {
            ultraDaimyo.gotoAndStop("attackDaimyo");
            ultraDaimyo.x -= 10;
          }
      }
if(Jumped == true)
  {
     ultraDaimyo.y -= 30;
     ultraDaimyo.gotoAndStop("jumpDaimyo");
  } 
if(dDown)
  {
     hspeed += 20;
     ultraDaimyo.gotoAndStop("runDaimyo");
     ultraDaimyo.scaleX = 1;
  }
if(aDown)
  {
     hspeed -= 20;
     ultraDaimyo.gotoAndStop("runDaimyo");
     ultraDaimyo.scaleX = -1;
  }
if(!aDown && !dDown && !AttackMode && !Jumped)
  {
    ultraDaimyo.gotoAndStop("idleDaimyo");
  }


if(ultraDaimyo.x - ultraDaimyo.width/2 < 0)//If the player goes past the left side
  {
    ultraDaimyo.x = ultraDaimyo.width/2;
  }
if(ultraDaimyo.x + ultraDaimyo.width/2 > 1400)//If the player goes past right
  {
    ultraDaimyo.x = 1400 - ultraDaimyo.width/2;//Player cant go past
  } 
if(ultraDaimyo.y + ultraDaimyo.height/2 < floor && Jumped)//If we are above the floor
  {
    if(Jumped)
      {
          ultraDaimyo.gotoAndStop("jumpDaimyo");
      }
    gravity++;//Accelerate gravity in the process
  }
if(ultraDaimyo.y + ultraDaimyo.height/2 > floor)
  {
    Jumped = false;//If we are on the floor then we're not jumping
    gravity = 0;//Gravity can no longer be applied
    ultraDaimyo.y = floor - ultraDaimyo.height/2;//Player sits on top of the floor
  }
}

Answer 1

KeyboardEvent不会连续触发，因为这将使检测单个击键变得困难。

您要做的是使用KeyboardEvent仅更改速度变量，但将速度应用于另一个连续Event （即Event.ENTER_FRAME的位置变量。

我根据您的代码创建了一个示例：

import flash.ui.Keyboard;
import flash.events.KeyboardEvent;
import flash.events.Event;

//Initialized variables
var speedX:Number = 0;

stage.addEventListener(KeyboardEvent.KEY_DOWN, keyYeet);

function keyYeet(e:KeyboardEvent):void
{
    if(e.keyCode == Keyboard.D)
    {
        speedX = 20;
    }

    if(e.keyCode == Keyboard.A)
    {
        speedX = -20;
    }
}

stage.addEventListener(KeyboardEvent.KEY_UP, keyNot);

function keyNot(e:KeyboardEvent):void
{
    if(e.keyCode == Keyboard.D || e.keyCode == Keyboard.A)
    {
        speedX = 0;
    }
}

addEventListener(Event.ENTER_FRAME, gameCycle);

function gameCycle(e:Event):void
{
    ultraDaimyo.x += speedX;
}

这个想法是当按键下降到某个值时设置速度，并在按键返回时将其设置回0。

速度将连续应用于该位置。

---

从评论：

请仔细检查您的第一句话。

确实有错别字，但内容确实如我所愿。

结果是连续射击=连续运动。

不适合我。 对于不同的（键盘）硬件或软件（操作系统，闪存运行时），这可能是不同的。 其他人也有类似的经验，就像在手头的问题的这些副本中可以看到的那样。

• key_down延迟动作脚本3
• 动作脚本3--尝试解决在按键时出现的延迟。

我们不要看显示对象的移动，也不要比较它们是否连续移动的观点。 让我们收集一些可比较的数据。

这是一个小的文档类，它计算KEY_DOWN事件在5次出现之间的延迟。

要使用它，请确保应用程序具有焦点并按下任意按钮，直到轨迹出现在输出面板中。

释放键将重置阵列，并且可以按住另一个键。

package 
{
    import flash.utils.getTimer;
    import flash.events.KeyboardEvent;
    import flash.display.Sprite;

    public class Main extends Sprite 
    {
        private var oldTime:Number = 0;
        private var deltaTimes:Array = [];

        public function Main() 
        {
            stage.addEventListener(KeyboardEvent.KEY_DOWN, onKeyDown);
            stage.addEventListener(KeyboardEvent.KEY_UP, onKeyUp);
        }

        private function onKeyDown(e:KeyboardEvent):void
        {
            var currentTime:Number = getTimer();

            // collect 5 time differences between two consecutive occurrences of this event

            if (deltaTimes.length < 5)
            {
                deltaTimes.push(currentTime - oldTime)    
            }
            else
            {
                stage.removeEventListener(KeyboardEvent.KEY_DOWN, onKeyDown);
                trace(deltaTimes);
            }

            oldTime = currentTime;           
        }

        private function onKeyUp(e:KeyboardEvent = null):void
        {
            deltaTimes = [];

            stage.addEventListener(KeyboardEvent.KEY_DOWN, onKeyDown);
        }
    }
}

这是我的结果：

7584,499,49,51,50
2117,500,50,50,50
1786,500,50,50,49
1375,499,48,50,52
1395,500,50,50,50
1385,500,50,50,50
1243,501,47,52,49
2167,501,49,50,50
1587,500,50,50,50
3871,500,50,48,53
2237,500,49,51,49
1715,500,47,53,50

可以观察到三个重要的事情：

1. 第一个值显然并不有趣，因为它是两次按下按钮之间的时间。 （我只是想把它们放在一起）
2. 第二个值大约为500毫秒，这意味着在事件的第一次和第二次发生之间经过了半秒的时间。
3. 最后三个值大约为50ms，比500ms短得多。 这是只要按下按键，事件将持续触发的速率

我在上面的答案中提供的代码解决了此问题。