Adding to a seriazable list in Unity 2021

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I am trying to serialize a list of integers to save and am getting an "object reference not set to an instance of an object" error - t$$anonymous$$s is for a code that I had used in Unity 2018 and am trying to use in Unity 2021.1.19. When I save individual integers, floats, etc to "unitSave" in the code below, there are no problems - it's only when I try to add them to a list.

[code=CSharp]public class ObjectSaveStats { public List playerUnits; public string unitName; }

public void Save() { List saveList = new List(); for (int i = 0; i < allUnitsList.Count; i++) { unitSave.unitName = allUnitsList[i].GetComponent().unitName; THIS WORKS unitSave.playerUnits.Add(allUnitsList[i].GetComponent().unitID; THIS GENERATES AN ERROR } }[/code]

Answer 1

Best Answer

Answer by mjonasz · Nov 22, 2022 at 06:32 PM

Solution: the list had to be explicity initialized:

  public List<float> playerUnits = new();

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Answer 2

Answer by Artmarab · Nov 22, 2022 at 03:35 PM

Your list in ObjectSaveStats is not correctly defined. Plus, there's a missing bracket at the end of your Add line.

Edit: Also @mjonasz are unitName and unitID components OR variables in a different component?

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mjonasz · Nov 22, 2022 at 04:09 PM 0

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@Artmarab I think the list is properly defined - only for some reason the "int" that follows "List" disappears when I type it into the thread.

The missing bracket: that's because I've cut a bunch of other subsequent lines saving data to "unitSave" - in the full script the bracket is there.

unitName and unitID are both variables in a different component - I don't know why it doesn't show in the thread but everything that's between "<" has disappeared. Both the "int" in defining the list and the name of the component where it says "GetComponent()"

Artmarab mjonasz · Nov 23, 2022 at 07:53 AM 0

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Not cool .

Adding to a seriazable list in Unity 2021

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