添加/补间/删除 - 同一MC的多个实例(Tweenlite)

时间:2009-11-11 21:45:03

标签: flash actionscript-3 actionscript tween

我正在尝试创建一个简单的循环,添加一个随机数量的星星,将它们淡化并删除它们。

我提出的剧本除了删除它们之外什么都做了,也许我需要更少的把孩子添加到舞台上。

这是我想出的

import flash.display.*;
import com.greensock.*;
import com.greensock.easing.*;

// timer setup
var timer:Timer=new Timer(randomNumber(500,1000));
timer.addEventListener(TimerEvent.TIMER,run_stars);
timer.start();

// Random number generator
function randomNumber(low:Number=NaN, high:Number=NaN):Number {
  var low:Number = low;
  var high:Number = high;
  if(isNaN(low)) { throw new Error("no low number"); }
  if(isNaN(high)) { throw new Error("no high number"); }
  return Math.round(Math.random() * (high - low)) + low;
}

// randomly adding stars on timer
function run_stars(event:TimerEvent):void {
    // random num of stars
    for (var i:Number=1; i<=randomNumber(2,7);i++) {

            var star:m_star = new m_star();
            addChild(star);

            // This is where my problem starts, I'm adding the same movie clip multiple times without any way to identify and remove. 


            star.x = randomNumber(0, stage.stageWidth);
            star.y = randomNumber(0,stage.stageHeight/2);

            TweenLite.to(star, randomNumber(0.5,1), {alpha:0.25, onComplete:removeStar()});

    }

    timer.delay = randomNumber(500,1000);
    timer.start();
}

function removeStar() {
    removeChild(star);
    //this would be where I attempt to remove a star but because they aren't unique it will never work, and the star movie clip is called inside of the function so it cant even see it. 
    }

stop();

我需要一种方法来使影片剪辑独特,所以我可以告诉我的oncomplete函数删除属性剪辑,如果我不这样做,电影最终会因为这么多(看不见的)动画片段而减速和崩溃。

谢谢!

2 个答案:

答案 0 :(得分:3)

将MovieClip作为onComplete函数的参数传递:

TweenLite.to(star, randomNumber(0.5,1), {
    alpha:0.25,
    onComplete:removeStar, 
    onCompleteParams:[star]
});

function removeStar(mc:MovieClip):void
{
    if (contains(mc))
    {
        removeChild(mc);
    }
}

答案 1 :(得分:1)

注意到这里的错误:

for (var i:Number=1; i<=randomNumber(2,7);i++) {

每次进入循环时,这将要求一个介于2和7之间的随机数。你会偏向1或2星而不是5或6.(从randomNumber传递的值减1,因为你的索引是1而不是0)我想你不是故意这样做的吗? / p>

var len:int = randomNumber(2, 7);
for (var i:int = 1; i <= len; i++) {

可能更接近你的工作方式。