Actionscript 3 如果类名是字符串,是否可以构造该类的实例?
如果类名是字符串,是否可以构造该类的实例?例如:Actionscript 3 如果类名是字符串,是否可以构造该类的实例?,actionscript-3,flash,apache-flex,dynamic,actionscript,Actionscript 3,Flash,Apache Flex,Dynamic,Actionscript,如果类名是字符串,是否可以构造该类的实例?例如: var className:String = "MyClass"; var obj:* = new getClass(className)(); 这是可能的。您必须使用getDefinitionByName(名称:String):Object 让舒尔确保您所参考的课程在swf文件中可用 var ClassReference:Class = getDefinitionByName("flash.display.Sprite") as Class
var className:String = "MyClass";
var obj:* = new getClass(className)();
这是可能的。您必须使用
getDefinitionByName(名称:String):Object
让舒尔确保您所参考的课程在swf文件中可用
var ClassReference:Class = getDefinitionByName("flash.display.Sprite") as Class;
var instance:Object = new ClassReference();
这是可能的。您必须使用
getDefinitionByName(名称:String):Object
让舒尔确保您所参考的课程在swf文件中可用
var ClassReference:Class = getDefinitionByName("flash.display.Sprite") as Class;
var instance:Object = new ClassReference();
试试这个:
import flash.utils.getDefinitionByName;
var className:String = "MyClass";
var obj:Object = new (getDefinitionByName(className) as Class)();
试试这个:
import flash.utils.getDefinitionByName;
var className:String = "MyClass";
var obj:Object = new (getDefinitionByName(className) as Class)();
是的
var myClass:Class = getDefinitionByName(className) as Class;
var instance:Object = new myClass();
是的
var myClass:Class = getDefinitionByName(className) as Class;
var instance:Object = new myClass();
虽然给出的答案是正确的,但如果您使用的是应用程序域,则这可能不起作用 要考虑应用程序域,请使用以下方法:
public static function forName(name:String, applicationDomain:ApplicationDomain = null):Class {
applicationDomain ||= ApplicationDomain.currentDomain;
var result:Class;
while (!applicationDomain.hasDefinition(name)) {
if (applicationDomain.parentDomain) {
applicationDomain = applicationDomain.parentDomain;
} else {
break;
}
}
try {
result = applicationDomain.getDefinition(name) as Class;
} catch (e:ReferenceError) {
throw new ClassNotFoundError("A class with the name '" + name + "' could not be found.");
}
return result;
}
var myClass:Class = forName(className);
var instance:Object = new myClass();
库中提供了此方法和许多其他实用程序虽然给出的答案是正确的,但如果您使用的是应用程序域,则此方法可能不起作用 要考虑应用程序域,请使用以下方法:
public static function forName(name:String, applicationDomain:ApplicationDomain = null):Class {
applicationDomain ||= ApplicationDomain.currentDomain;
var result:Class;
while (!applicationDomain.hasDefinition(name)) {
if (applicationDomain.parentDomain) {
applicationDomain = applicationDomain.parentDomain;
} else {
break;
}
}
try {
result = applicationDomain.getDefinition(name) as Class;
} catch (e:ReferenceError) {
throw new ClassNotFoundError("A class with the name '" + name + "' could not be found.");
}
return result;
}
var myClass:Class = forName(className);
var instance:Object = new myClass();
库中提供了此方法和许多其他实用程序。。不要忘记在类名前面加上完整的包路径。。。不要忘记在类名前面加上完整的包路径。