动作 - 强制垃圾收集不工作在日常生活？

问题描述

开展以下code在ADL的时候，为什么方继续转动？

when launching the following code in ADL, why does the square continue to rotate?

var square:Sprite = new Sprite();
square.graphics.beginFill(0xFF0000);
square.graphics.drawRect(-25, -25, 50, 50);
square.x = square.y = 100;
addChild(square);

addEventListener(Event.ENTER_FRAME, rotateSquare, false, 0, true);

function rotateSquare(evt:Event):void
    {
    square.rotation += 2;
    }

System.gc();

更新

下面的显示对象具有弱引用ENTER_FRAME事件侦听器。然而，美其名曰：

Update

the following display object has a weak referenced ENTER_FRAME event listener. however, calling:

removeChild(testInstance);
testInstance = null;

不停止ENTER_FRAME事件：

doesn't stop the ENTER_FRAME event:

package
{
import flash.display.Sprite;
import flash.events.Event;

public class Test extends Sprite
    {       
    private var square:Sprite;

    public function Test()
        {
        addEventListener(Event.ADDED_TO_STAGE, init);
        }

    private function init(evt:Event):void
        {
        removeEventListener(Event.ADDED_TO_STAGE, init);

        square = new Sprite();
        square.graphics.beginFill(0xFF0000);
        square.graphics.drawRect(-25, -25, 50, 50);
        square.x = square.y = 100;
        addChild(square);

        addEventListener(Event.ENTER_FRAME, rotateSquare, false, 0, true);

//      //Current Solution - only works on display objects
//      addEventListener(Event.REMOVED_FROM_STAGE, removeHandler);
        }

    private function rotateSquare(evt:Event):void
        {
        trace("square is rotating");
        square.rotation += 2;
        }

//  private function removeHandler(evt:Event):void
//      {
//      removeEventListener(Event.REMOVED_FROM_STAGE, removeHandler);
//      removeEventListener(Event.ENTER_FRAME, rotateSquare);
//      }
    }
}

我添加了一个REMOVED_FROM_STAGE事件侦听器，但这只能在显示对象。

i have added a REMOVED_FROM_STAGE event listener, but this will only work on display objects.

是特定于ENTER_FRAME事件？

is this problem specific to ENTER_FRAME event?

推荐答案

Flash的垃圾回收仅清除指出，要么是零引用计数或只有弱引用元素/对象/变量。

Flash's garbage collection only clears out elements/objects/variables that have either a zero reference count or have only weak references.

这意味着你需要做到这一点。为了使它真正得到gc'd。

This means you would need to do this. For it to truly be gc'd.

removeChild(square)
square = null;
System.gc()

这篇关于动作 - 强制垃圾收集不工作在日常生活？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！