System.Array.IndexOf returns -1

Question

I put a screenshot that will tell you everything.

    private Transform[] hiddenObjects;
void Start()
{
    leftImageRandom = new Randomizer(0, LeftImageSequence.transform.childCount - 1, true);
    DoStart();
}
private void DoStart()
{
    leftImageIndex = leftImageRandom.getRandom();
    LeftImageSequence.setCurrentChildIndex(leftImageIndex);
    RightImageSequence.setCurrentChildIndex(leftImageIndex);

    //take hidden objects and put them in an array
    hiddenObjects = RightImageSequence.CurrentChild.transform.GetChild(0).transform.GetComponentsInChildren<Transform>();
    for(int i=1;i<hiddenObjects.Length;i++)
        hiddenObjects[i].gameObject.GetOrAddComponent<MouseEventSystem>().MouseEvent += ClickedHiddenObject;
    Debug.Log(hiddenObjects.Length);
}

private void ClickedHiddenObject(GameObject target, MouseEventType type)
{
    if (type == MouseEventType.CLICK && CanClick)
    {
        int targetIndex = System.Array.IndexOf(hiddenObjects, target.gameObject);
        Debug.Log(targetIndex);
        hiddenObjects[targetIndex].GetComponent<SpriteRenderer>().DOFade(1f, 0.3f).SetEase(Ease.Linear);
    }
}

I have a targetIndex that needs to return the index of the object I clicked on. Each object contains the PoligonCollider2D component. The problem is that it always returns -1 to any object. What's the problem, what am I doing wrong?

Answer 1

From your code:

private Transform[] hiddenObjects;
...
System.Array.IndexOf(hiddenObjects, target.gameObject)

hiddenObjects is an array of Transform, but target.gameObject is a GameObject (actually target is already a GameObject, so this is redundant): the types don't match, so indeed a GameObject is never gonna be equal to a Transform.

Instead try:

System.Array.IndexOf(hiddenObjects, target.transform)