问题
I've got a string which, in run-time, contains the name of a class that I want to instantiate. How would I do that?
I read suggestions to use flash.utils.getDefinitionByName()
:
var myClass:Class = getDefinitionByName("package.className") as Class;
var myInstance:* = new myClass();
However, that gives me the following error:
[Fault] exception, information=ReferenceError: Error #1065: Variable className is not defined.
回答1:
The easiest method I've come up with is to simply write the classnames out, separated by semicolons, anywhere in your project.
e.g. I create an Assets.as file with this in it:
package {
public class Assets {
// To avoid errors from the compiler when calling getDefinitionByName
// just list all of the classes that are not otherwise referenced in code:
Balloon;
Cloud;
FlyingHorse;
FlyingPig;
UFO;
Zeppelin;
}
}
Full code example/tutorial on this is here: http://producerism.com/blog/flashpunk-dame-and-lua-tutorial-part-6/
回答2:
The other option is to use the mxmlc -includes compiler argument like this:
-includes=com.mydomain.package.MyClass
http://blogs.adobe.com/cantrell/archives/2010/09/loading-classes-dynamically-in-actionscript-3.html
来源:https://stackoverflow.com/questions/6934141/instantiate-a-class-from-a-string-in-actionscript-3