强制内存回收方法之二 - 达人(ycccc8202)

2009/04/01 | 强制内存回收方法之二
类别(flash学习) | 评论(0) | 阅读(406) | 发表于 01:48: //以前我们最熟悉的强制内存回收的方法是:
function GC():void{
  try{
  (new LocalConnection).connect("foo");
  (new LocalConnection).connect("foo");}catch(e){
trace(System.totalMemory);
}
  }
//由于上次试验弱引用的时候，发现当轮询本地sharedobject对象的时候，导致弱引用的内容进行了回收，于是联想用来进行强制内存回收..代码如下:
package {
/**
  * @author CYPL
  * @date 2009-04-01
  */
import flash.net.SharedObject;
import flash.system.System;
import flash.utils.clearInterval;
import flash.utils.setInterval;
public class GCPlus {
  public static function clear(isTraceTM : Boolean = false) : void {
var time : int = 2;
var interval : int = setInterval(loop, 50);
function loop() : void {
if(!(time--)) {
   isTraceTM && trace(System.totalMemory);
   clearInterval(interval);
   return;
}
SharedObject.getLocal("cypl", "/");
}
  }
}
}

//----------------------------------------------------------------------------------------------------------------------

//测试文档类:[code]
package {
import flash.display.MovieClip;
import flash.display.Sprite;
import flash.events.MouseEvent;
import flash.system.System;
/**
  * @author CYPL
  */
public class GC_Test extends Sprite {
  private static const NUM : int = 1000;
  private var num : int;
  public function GC_Test() {
init();
  }
  private function init() : void {
num = NUM;
stage.addEventListener(MouseEvent.CLICK, clickHandler);
while (num--) {
var mc : MovieClip = new MovieClip;
mc.graphics.beginFill(0);
mc.graphics.drawRect(0, 0, 100, 100);
mc.x = Math.random() * 500;
mc.y = Math.random() * 400;
addChild(mc);
}

   trace(System.totalMemory);
  }
  private function clickHandler(e : MouseEvent) : void {
clear();
  }
  private function clear() : void {
while (numChildren) {
removeChildAt(0);
}
GCPlus.clear(true);
  }
  /*function GC():void{//这是我们熟悉的方法
  try{
  (new LocalConnection).connect("foo");
  (new LocalConnection).connect("foo");}catch(e){
trace(System.totalMemory);
}
  }*/
}
}

//通过System.totalMemory的结果可以清楚的看到内存得以释放，感觉原理也可能和异常有点关系.; 1

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