如何追踪调用“OnValidate()”的来源

Question

I want a script to have radio buttons for booleans and it seems like OnValidate() would be the perfect way to do that. However, i would need to trace what value was changed in the inspector and put a check for the identifier but I couldn't find the solution for the tracing part. How do i know what value was changed for OnValidate() to be called?

Answer 1

As said in the comments might not be the most "beautiful" solution but I would do it eg like

// These are the fields in the Inspector
// changing any via the Inspector will Invoke OnValidade
[SerializeField] private bool bool1;
[SerializeField] private bool bool2;

// These are private and will be used to check what was changed
private bool _oldBool1;
private bool _oldBool2;

private void OnValidate()
{
    if(bool1 != _oldBool1)
    {
        // bool1 was changed 

        if(bool1)
        {
            // Probably: set all other values to false
        }
        else
        {
            // Probably check if all other values are false, if so this may not be false
        }
    }

    if(bool2 != _oldBool2)
    {
        // bool2 was changed 

        if(bool2)
        {
            // Probably: set all other values to false
        }
        else
        {
            // Probably check if all other values are false, if so this may not be false
        }
    }

    // Etc

    // And finally store the new values


    _oldBool1 = bool1;
    _oldBool2 = bool2;

    // Etc
}

Afaik the changes via script of the serialized fields should not Invoke another OnValidate , only changes via the Inspector or the first time the asset is loaded.

This function is called when the script is loaded or a value is changed in the Inspector (Called in the editor only).

You could probably also work with a List/Array instead of individual fields of course

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Typed on smartphone so can't test it right now but I hope the idea gets clear