利用GreenSock Tweening Platform製作動畫
因為馬老師剛開始利用程式製作補間動畫的Class是Tweener，所以前面介紹了很多篇這方面的文章，但當然這方面的Class不是只有Tweener而已，所以接下來介紹一個目前發展起來比Tweener還要棒很多的Class，它是由GreenSock研發的Tweening Platform（補間平台），其中包含了：「TweenNano」、「TweenLite」、「TweenMax」、「TimelineLite」、「TimelineMax」。
為什麼說他發展得比較好呢？除了Tweener能做到的幾乎它都可以以外，也因為Tweener已經停止開發，所以未來將不會有新增的功能，但TweenMax還在不斷的更新中，在官網還有以下的比較案例：
從上面的案例可以看出來利用GreenSock所研發的Tweening Platform的執行效能會比其他的好（FPS越高越好），所以接下來就來看看GreenSock Tweening Platform的簡介。
TweenNano、TweenLite與TweenMax算是同樣功能，但在製作後檔案容量是TweenNano<TweenLite<TweenMax，也就是說利用TweenNano所製作出來的動畫容量是最小的，舉個例來說，像這樣的動畫效果，TweenNano製作後swf大小為：5KB、TweenLite：8KB、TweenMax：21KB，不過在功能上面也是TweenNano<TweenLite<TweenMax，也就是說TweenMax可以掌控的效果比較多，也更具有彈性，例如：TweenNano就沒有辦法執行：pause()、play()、restart()…等，而TweenLite沒辦法執行：貝茲曲線運動、濾鏡…等，所以要用哪個版本的Tween，端看想要製作的動畫效果來考量，官方也有針對此三者製作比較表供大家參考。
另外TimelineLite和TimelineMax算是同樣功能，但看到後面的英文單字應該可以了解與上述具有相同的關聯，而這方面的Class是可以掌握時間軸上面的變化，在Tweener中，我們只能用Delay來控制動畫先後順序，而在GreenSock所研發的Tweening Platform中則可以利用TimlinelineLite或TimelineMax來處理。
馬上來介紹有關這個Class的一些使用方式，與Tweener一樣的是必須先下載（備用載點），然後在需要使用的Flash檔案中import該Class，下載解壓後會有以下的資料夾：
- badges：GreenSock圖標。
- com：主要Class資料夾。
- demo_swfs：裡面有很多swf的展示，對於想要了解本Class非常有幫助。
- docs：參考文件。
在import時，看你想要使用的Class來import，例如需要使用TweenNano則：
import com.greensock.TweenNano;
若需同時使用TweenLite和TweenMax則：
import com.greensock.TweenLite; import com.greensock.TweenMax;
想偷懶，則：（別擔心，Flash只會內嵌有使用到的部分）
import com.greensock.*;
至於製作補間的程式碼，其實官方就有製作swf來給大家參考，這邊也把官方的範例放進來給大家參考：
上面的案例可以讓你測試動畫效果，下方也會產生該段動畫的程式碼供你使用，實在是非常方便。另外關於Tween的語法也可以改成下面這種版本：
TweenLite.from(mc, 1.5, {y:0, alpha:0});
一個是告訴動畫要去哪，另一個是告訴動畫要從哪開始變化，關於Tweener可以使用的delay、onComplete、onStart、onUpdate…等，這個Class也都可以使用，例如：
TweenLite.to(mc, 1.5, {x:100, ease:Elastic.easeOut, delay:1, onComplete:okFn});
function okFn() {
trace("動畫執行完畢");
}
這個Class還有很多特別的動畫效果，例如：濾鏡、短距離旋轉、貝茲曲線、聲音、色彩變換…等，大家也可以參考官方製作的swf來參考動畫效果與取得程式碼：
在動畫控制上面可以使用如下的程式碼來控制動畫：
var myTween:TweenLite = new TweenLite(mc, 1, {x:100, y:100});
myTween.pause();
//暫停動畫播放
myTween.resume();
//恢復動畫播放
myTween.reverse();
//反向播放
myTween.play();
//播放動畫
myTween.restart();
//重播動畫
myTween.invalidate();
//移除補間並使元件恢復原始狀態
myTween.kill();
//清除補間動畫
TweenLite.killTweensOf(mc);
//清除所有物件之補間動畫
以上是有關GreenSock Tweening的介紹，接下來介紹有關TimelineLite與TimelingMax的部分。
就像上面有提到在Tweener中我們如果希望三個元件在不同的時間點開始移動，就只能使用delay或是另外寫程式來控制，現在我們可以使用Timeline相關的Class來完成這樣的任務，甚至還可以讓時間軸倒著播放也沒問題，以下就是有關TimelineLite的官方範例：
另外是TimelineMax的範例檔，供大家參考：
以上就是針對GreenSock Tweening Platform大致的介紹，建議有空可以前往官網鑽研更多其他的功能，另外其實GreenSock另外還有TransformManager和LoaderMax，各位也可以先參考官網文章或是未來再跟大家分享我的使用心得。
註：本範例所使用的範例版權屬於GreenSock公司所有。
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