ActionScript 3，如何让角色跳得更久

Question

我正在使用Flash（AS3）制作平台游戏，下面的代码可以使用。我希望我的角色跳得足够高，以便有时间到达一个平台。下面代码的唯一问题是它上下跳跃的速度和跳跃的高度。空格键是触发函数运行的原因。

请帮助，因为我非常感谢！ ：）

Player.addEventListener(Event.ENTER_FRAME, fl_MoveInDirectionOfKey);
stage.addEventListener(KeyboardEvent.KEY_DOWN, fl_SetKeyPressed);
stage.addEventListener(KeyboardEvent.KEY_UP, fl_UnsetKeyPressed);

function fl_MoveInDirectionOfKey(event:Event)
{
    if (spacePressed){
        var gravity:Number = 9.8;
        var jumping:Boolean = false;
        var jumpVar:Number = 0;

        if(jumping != true)
        {
            jumpVar = -70;
            jumping = true;
        }

        if(jumping)
        {
            spacePressed = false;
            Player.y += jumpVar;
            jumpVar += gravity;
        }
        Player.addEventListener(Event.ENTER_FRAME, drop);
        function drop(event:Event)
        {
            Player.y -= jumpVar;
            jumpVar -= gravity;
            if(Player.y > 350){
                Player.y = 350;
            }
        }
        Player.removeEventListener(Event.ENTER_FRAME, fl_MoveInDirectionOfKey);
        Player.addEventListener(Event.ENTER_FRAME, fl_MoveInDirectionOfKey);

        /*var frameNumb:Number = 0;

        Player.addEventListener(Event.ENTER_FRAME, jumpup);
        spacePressed = false;
        function jumpup(event:Event)
        {
            while(frameNumb < 30){
                spacePressed = false;
                Player.y -= 1;
                frameNumb += 0.5;
            }
            Player.removeEventListener(Event.ENTER_FRAME, jumpup);
            Player.addEventListener(Event.ENTER_FRAME, jumpdown);
            function jumpdown(){
                while(frameNumb > 0){
                    spacePressed = false;
                    Player.y += 1;
                    frameNumb -= 0.5;
                }
            }
        }*/
    }
    if (leftPressed)
    {
        Player.x -= speed;
        Player.gotoAndStop("left");
    }
    if (rightPressed)
    {
        Player.x += speed;
        Player.gotoAndStop("right");
    }
}

由于