MXML和AS相互调用问题
先看看我的

JScript code

<?xml version="1.0" encoding="utf-8"?><s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"               xmlns:s="library://ns.adobe.com/flex/spark"               xmlns:mx="library://ns.adobe.com/flex/mx"               minWidth="955" minHeight="600">    <fx:Script>        <![CDATA[            import com.action.Action;                        import mx.collections.ArrayList;            import mx.events.FlexEvent;                        var action : Action = new Action();                    ]]>    </fx:Script>    <fx:Declarations>        <!-- 将非可视元素（例如服务、值对象）放在此处 -->    </fx:Declarations>    <s:Panel id="cfb" x="190" y="72" width="586" height="340" title="9 9 乘法表">        <s:TextArea id="_tx" x="10" y="10" width="562" height="258"/>        <s:Button x="212" y="281" width="117" label="click me" click="action.setValue()"/>    </s:Panel></s:Application>

再来看看我的AS：

Java code

package com.action{    public class Action {            public var a:app;            public var str:String = "";            public function Action(){            }            public function setValue():void{                for(var i : Number = 1;i < 10;i++){                    for(var j : Number = 1;j < i + 1;j++){                            if(i * j < 10){                                str+= j + " * " + i + " = " + i * j + " " + " " + " " + " ";                            }else{                                str+= j + " * " + i + " = " + i * j + " " + " ";                            }                    }                    str+="\n";                }                a._tx.text = str;            }    }}

为什么我点按钮的时候 9 9乘法表没有出现在文本域里？我的调用有什么不规范的？大虾们来帮我看看啦。。我接触FLEX不到24小时啊。。。

[解决办法]
在app中加入
[Bindable]
private var action : Action = new Action();

protected function application1_creationCompleteHandler(event:FlexEvent):void
{
action.a = this;
}
[解决办法]
把a._tx.text = str;
换成
Application.application._tx.test=str;
记得导入mx.core.application;
[解决办法]
能出现才怪
[解决办法]
呃...
分捞不着了...
[解决办法]
非必要尽量不要把对象引入类里.

click句柄里直接给需要的对象赋值:
<fx:Script>
<![CDATA[
import com.action.Action;
var action : Action = new Action();
]]>
</fx:Script>
<s:TextArea id="_tx" x="10" y="10" width="562" height="258"/>
<s:Button x="401" y="290" width="117" label="click me" click="{_tx.text=action.setValue()}"/>


--------------------
setValue返回string

public function setValue():String{
var str:String = "";
for(var i : Number = 1;i < 10;i++){

for(var j : Number = 1;j < i + 1;j++){
if(i * j < 10){
str+= j + " * " + i + " = " + i * j + " " + " " + " " + " ";
}else{
str+= j + " * " + i + " = " + i * j + " " + " ";
}
}
str+="\n";
}
return str;
}

尽可能的剥离对象间的依赖关系.
[解决办法]

探讨

非必要尽量不要把对象引入类里.

click句柄里直接给需要的对象赋值:
<fx:Script>
<![CDATA[
import com.action.Action;
var action : Action = new Action();
]]>
</fx:Script>
<s:TextArea ……

[解决办法]
支持#7的观点