Question

我正在创建Flash游戏，我想制作类似的东西：如果键“x”点击它启动attack1动画，如果键“x”双击它启动attack2动画。怎么做到的？我没有想法。

现在我有简单的代码，当点击“x”时它开始播放attack1动画：

stage.addEventListener(KeyboardEvent.KEY_DOWN, key_down);


private function key_down(event:KeyboardEvent)
{
    if (event.keyCode == 88)
    {
        if (attack > 0)
        {
            return;
        }// don't interrupt other attack
        for (c in codes)
        {
            if (codes[c] == event.keyCode)
            {
                attack = c;
                Hero.gotoAndStop("attack" + attack);
            }
        }
    }

Answer 1

存储按键的时间（例如，使用getTimer()），然后比较二次按下的时间与上一次的时间。如果差距足够小，那就是双击。

粗略的未经测试的代码可以提供您的想法：

var keysPressed:Object = {};

stage.addEventListener(KeyboardEvent.KEY_DOWN, keyboard);

function keyboard(e:KeyboardEvent):void
{
    if(keysPressed[e.keyCode] !== undefined)
    {
        // Compare time, maybe half a second (500ms).
        if(getTimer() - 500 < keysPressed[e.keyCode])
        {
            // Double press.
            //
        }
    }

    keysPressed[e.keyCode] = getTimer();
}

Answer 2

//function for calculating is click is double click or single click:


stage.addEventListener(MouseEvent.CLICK, checkDoubleClick);
var mClick:Boolean = false;
var timer;
var timer2;
//
function checkDoubleClick(e:*)
{
    if (! mClick)
    {
        timer = getTimer() / 1000;
        mClick = true;
    }
    else
    {
        timer2 = getTimer() / 1000;
    }
    //if it is a double click
    if ((timer2-timer)<.20)
    {
        trace("double click");
    }
    else
    {
        timer = getTimer() / 1000;
        trace("single click");
    }
}

操作脚本3.如何为双击键盘键添加事件侦听器

2 个答案: