是不是有一些方法来重写下面的代码,这样我就不需要每种可想象的类型都有一个巨大的switch语句了?此外,如果我可以用某种方式替换switch语句来动态创建新控件,那么我可以使代码更小,更直接,并且不必预测自定义控件类型的可能性。在ActionScript中动态创建Flex组件
前:
<?xml version="1.0" encoding="utf-8"?>
<mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical">
<mx:Script>
<![CDATA[
import mx.containers.HBox;
import mx.controls.Button;
import mx.controls.Label;
public function CreateControl(event:Event):void {
var Type:String=Edit.text;
var NewControl:Object;
switch (Type) {
case 'mx.controls::Label':NewControl=new Label();break;
case 'mx.controls::Button':NewControl=new Button();break;
case 'mx.containers::HBox':NewControl=new HBox();break;
... every other type, including unforeseeable custom types
}
this.addChild(NewControl as DisplayObject);
}
]]>
</mx:Script>
<mx:Label text="Control Type"/>
<mx:TextInput id="Edit"/>
<mx:Button label="Create" click="CreateControl(event);"/>
</mx:WindowedApplication>
AFTER:
<?xml version="1.0" encoding="utf-8"?>
<mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical">
<mx:Script>
<![CDATA[
import mx.containers.HBox;
import mx.controls.Button;
import mx.controls.Label;
public function CreateControl(event:Event):void {
var Type:String=Edit.text;
var NewControl:Object= *???*(Type);
this.addChild(NewControl as DisplayObject);
}
]]>
</mx:Script>
<mx:Label text="Control Type"/>
<mx:TextInput id="Edit"/>
<mx:Button label="Create" click="CreateControl(event);"/>
</mx:WindowedApplication>
线做一些事情看来这是http://stackoverflow.com/questions/3001499/dynamically-的衍生物在投稿中遇到的问题我会在找到你的投稿解决方案时检查。但是如果你想要更好的代码可读性,你很可能必须把switch语句放在别的类中。干杯:D – phwd 2010-06-09 00:04:56
你也应该看看http://stackoverflow.com/questions/2016201/dynamic-object-initiation-as3 @ krichard的方法可以工作 – phwd 2010-06-09 00:12:45