In actioscript 3, I can access an object instance by using a string with the instance name. For example if I have a sprite called background and it contains an object named myObj I can access it with
obj = background["myObj’];
This is very useful if there are multiple objects of the same type with names myObj1, myObj2, myObj3, etc. I can access any one of them by number with:
obj = background["myObj’ _ String(number)];
What’s the equivalent of this in OpenFl/Haxe?
Are your assets coming from a SWF file?
Are you using the
generate="true" option to generate classes for your exported symbols?
If you did generate and do use the class types, you can reference it directly:
obj = background.myObj;
However, if you are not (or need to dynamically come up with the name), but are using SWF-based assets, the fields are dynamically assigned if you compile using
obj = Reflect.field (background, "myObj" + number);
For any other type of object, you should always be able to use
getChildByName, like this:
obj = background.getChildByName ("myObj" + number);
Thanks, that worked. Using obj = getChildByName forced me to coerce the correct type which is a pain compared to using “as” in actionscript. With Reflect I didn’t have to coerce but the documentation for Reflect said “Use with caution.” What should I be concerned about?
It could crash if you reference a field that doesn’t exist, if you aren’t use, use something like
Reflect.hasField before using
Reflection also varies a bit per platform, but its generally safe (we use it in Actuate, for example)