flex内存泄露解决之道
(1)Event Listeners
Listening to parent objects does cause memory leaks
e.g.
override protected function mouseDownHandler(…):void {
systemManager.addEventListener(“mouseUp”, mouseUpHandler);
you can:
1.Removing the addEventListener (when dispose).
systemManager.removeEventListener(“mouseUp”, mouseUpHandler);
2. Use of weak reference listeners
override protected function mouseDownHandler(…):void {
systemManager.addEventListener(“mouseUp”, mouseUpHandler, false, 0, true);
These do not block garbage collection(generally do not cause memory leaks):
Weak References
Self References
References to Child Objects
weak reference event listener e.g.
&nb
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<?xml version="1.0" encoding="utf-8"?>
<!-- Simple example to demonstrate the DateTimeAxis class. -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
<mx:Script>
import mx.collections.ArrayCollection;
......
(1)tree点击事件public function handleList(ev:ResultEvent)
{
sourceList=ev.result as ArrayCollection;
}
private function tree_itemClick(evt:ListEvent):void {
var item:Object = Tree(evt.currentTarget).selectedItem;
if (pmtree.dataDescriptor.isBranch(item)) {
......
1、自定义组件
2、自定义事件
3、结合使用
一、自定义组件(使用的是Flex组件,ActionScript组件相对麻烦点,可视化差点)
该组件由一个TextArea和两个Button组成,如图:
代码:
MyComponent.mxml
<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" width=" ......
润乾即时报表不仅可以通过拖拽的方式轻松实现各种常见类型的web报表制作,而且在展现报表时还提供了灵活的Flex工具条,可以通过Flex工具条实现调整列宽、排序和过滤显示数据等功能。下面就先简单的介绍一下如何使用Flex工具条实现数据按某列排序。 我们设计一个简单类型的报表,报表查看如下图 现在我们设置数据按照 雇员 ......
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
verticalAlign="middle"
backgroundColor="white"
......