使用Flash Builder 4.6在Flex中的HelloWorld

Question

我的代码如下:

1,)标签和按钮都重叠.我该如何解决这个问题？(我知道absolute默认情况下布局设置为,但当我删除minWidth="955" minHeight="600"并包含时layout="horizontal"我得到以下错误)

Description Resource    Path    Location    Type
Initializer for 'layout': values of type spark.layouts.supportClasses.LayoutBase cannot be represented in text. HelloFlex.mxml  /HelloFlex/src  line 4  Flex Problem

2.)我可以知道标签的含义xmlns:fx xmlns:s xmlns:mx以及我应该使用它们的情况吗？

3.)在FLex Builder 4.6中,在设计模式下我可以用Drag-and-drop组件来设计用户界面吗？

 <?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:Declarations>
            <!-- Place non-visual elements (e.g., services, value objects) here -->

        </fx:Declarations>
        <mx:Label text="Hello World"/>
        <mx:Button label="Click"/>


    </s:Application>

Answer 1

以下代码可以帮助您: -

<?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:Declarations>
        <!-- Place non-visual elements (e.g., services, value objects) here -->
    </fx:Declarations>
    <s:layout>
        <s:HorizontalLayout paddingTop="5" paddingLeft="5" paddingRight="5" paddingBottom="5"/>
    </s:layout>
    <mx:Label text="Hello World"/>
    <mx:Button label="Click"/>
</s:Application>