Want to pass a value from one method to another, can't seem to get it working

NakedFanatic

Hi,

I'm rather amateurish at programming and only have some experience in Unity. Now I'm trying to get a QUIZ with four different answers working. So far so good.

I have two methods in _ready at the moment: pick_question set_question

The first one will later pick a question at random, at the moment I do it manually. The questions are stored in a different scene and instantiated.

This is _pick_question at the moment:

var childAmount = questions.get_child_count()	
var activeQuestion = questions.get_child(1)

var activeFact = activeQuestion.fact;

and this _set_question:

questionText.set_text(activeQuestion.fact)
answerOne.set_text(questions.get_child(1).firstAnswer)
answerTwo.set_text(questions.get_child(1).secondAnswer)
answerThree.set_text(questions.get_child(1).thirdAnswer)
answerFour.set_text(questions.get_child(1).fourthAnswer)

I want to change the text of a Label with the first command.

If I try to run the code I get an error: Invalid get index "fact" (on base: "nil")

If I try it by adding and implementing var activeFact = activeQuestion.fact; I get this error: Invalid type in function "Set_text" in base "Label". Cannot convert argument 1 from Nil to String

If I consolidate both methods into one, it works fine.

What am I doing wrong? I'm trying to keep my functions compact and I don't want to jam it all into one.

Thanks in advance.

TwistedTwigleg

It's hard to say for sure what is causing the problem. I can tell you what the errors are (sort of) saying and maybe that will help?

Invalid get index "fact" (on base: "nil")

You are trying to access a variable called fact on a nill/null instance.

This means the node you think you have, or are trying to get (I will assume it's activeQuestion, given the code above) is set to nill/null, meaning it has not been set.

In other words, you have not successfully gotten the node/class/object into the activeQuestion variable.

The way to fix this problem is to look and see where you are setting activeQuestion, and make sure it is being set correctly. This problem could also be occuring because you are trying to access activeQuestion before you have set it, so you may need to change the order of your code if you are calling functions that access activeQuestion before it's set.

Invalid type in function "Set_text" in base "Label". Cannot convert argument 1 from Nil to String

This is similar to the other problem. You cannot set a label's text to a nill/null value. Because activeQuestion is null/nill, calling activeQuestion.fact will also return nill/null, which is causing the issue. Once activeQuestion is set correctly, this problem should also be fixed at the same time.