Macromedia flex 2-migrating applications to flex 2 Manual De Usuario

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ActionScript 2.0 to 3.0

newstring2.prop = 1;
trace(newstring2.prop);

// prints '1' 

ActionScript 3.0:

newstring = new String("hello");
String.prototype.sayHi = function() {

trace("hi!");

}
newstring.sayHi();
newstring2 = "hello";
newstring2.prop = 1; 

// Warning, String is sealed...

String.prototype.prop = 1;
trace(newstring2.prop); 

// Output: 1

Working with keys

The Key class is now the Keyboard class.

doLater() method

The 

doLater()

 method on UIComponent has been removed. You now use 

callLater()

. 

The 

callLater()

 method takes a similar number of arguments. You no longer specify the 

object on which the function to be called later is defined. In addition, because of stricter 
typing, you must remove quotes from around the function if you used them; the type is 
function and cannot be coerced from type String. For example:

Flex 1.5:

doLater(this, "moveText");

Flex 2:

callLater(moveText);

The 

callLater()

 method still takes an optional 

args

 argument. For more information, see 

ActionScript 3.0 Language Reference.

LocalConnection

The 

LocalConnection.allowDomain()

 method specifies one or more domains that can send 

LocalConnection calls to this LocalConnection instance. In previous versions of ActionScript, 
the 

allowDomain()

 method was a callback method that you implemented. In ActionScript 

3.0, 

allowDomain()

 is a built-in method of LocalConnection that you call. This makes the 

allowDomain()

 method work in much the same way as the 

Security.allowDomain()

 

method.