Flex dynamic 关键字的用法（动态类）

破晓

Flex dynamic 关键字使用实例代码。对于学习flex的朋友也许有所帮助。

动态类型，类的属性和方法不确定，允许在运行时动态的添加。MovieClip 类便是动态类。当要继承动态类时，也要定义为动态类型。一般只用于特殊场合。

EmployeeRecord.as
代码如下:

1. package empty
   
2. {
   
3. public dynamic class EmployeeRecord
   
4. {
   
5. }
   
6. }

复制代码

EmptyClass.mxml
代码如下:

1. <?xml version="1.0" encoding="utf-8"?>
   
2. 
   
3. <mx:Application
   
4. xmlns:mx="http://www.adobe.com/2006/mxml"
   
5. 
   
6. viewSourceURL=""
   
7. horizontalAlign="center" verticalAlign="middle"
   
8. width="100%" height="100%"
   
9. >
   
10. <mx:Script>
    
11. <!--[CDATA[
    
12. import empty.EmployeeRecord;
    
13. private function showProperties():void
    
14. {
    
15. var emp:EmployeeRecord = new EmployeeRecord();
    
16. emp.name = "Peter Griffen";
    
17. emp.age = 22;
    
18. emp.address = "123 St Peter Blvd, #552";
    
19. emp.city = "Quahog";
    
20. emp.state = "NY";
    
21. emp.zip = "02593";
    
22. 
    
23. var displayInfo:Function =
    
24. function ():String
    
25. {
    
26. var out:String;
    
27. out = "Employee Record:\n";
    
28. out += "Name: " + emp.name + "\n";
    
29. out += "Age: " + emp.age + "\n";
    
30. out += "Address: " + emp.address + "\n";
    
31. out += "City: " + emp.city + "\n";
    
32. out += "State: " + emp.state + "\n";
    
33. out += "Zip: " + emp.zip + "\n";
    
34. 
    
35. return out;
    
36. }
    
37. 
    
38. emp.displayRecord = displayInfo;
    
39. panelPropertyArea.text = emp.displayRecord();
    
40. }
    
41. ]]-->
    
42. </mx:Script>
    
43. <mx:Panel id="panel" title="A Simple Use of Package" status="Active"
    
44. height="75%" width="75%"
    
45. paddingTop="5" paddingLeft="5" paddingRight="5" paddingBottom="5">
    
46. <mx:Label width="100%" color="blue"
    
47. text="Program Execution Result: "/>
    
48. <mx:TextArea id="panelPropertyArea" width="100%" height="100%"/>
    
49. <mx:Button label="Click to Run Program" click="showProperties();"/>
    
50. </mx:Panel>
    
51. </mx:Application>

复制代码

详细出处参考：http://www.jb51.net/article/18258.htm