Selectable.FindSelectableOnDown

Returns

Selectable The Selectable object below current.

Description

Find the selectable object below this one.

UI.Selectable.FindSelectableOnDown.

using UnityEngine;
using System.Collections;
using UnityEngine.UI; // required when using UI elements in scripts

public class Example : MonoBehaviour
{
    public Button startButton;

    // Disables the selectable UI element directly below the Start Button
    public void IgnoreSelectables()
    {
        //Finds the selectable UI element below the start button and assigns it to a variable of type "Selectable"
        Selectable secondButton = startButton.FindSelectableOnDown();
        //Disables interaction with the selectable UI element
        secondButton.interactable = false;
    }
}