ActionScript 3 检查是否存在Class Definiton

Posted 2021-05-23

var instance:Sprite;

if ( ApplicationDomain.currentDomain.hasDefinition("MyClassName") ) 
{
	var MyClass:Class = getDefinitionByName( "MyClassName" ) as Class;
	instance = new MyClass( params ) as Sprite;
}else {
	instance = new Sprite( params );
}