GameWindow.UnfocusedThisFrame

Returns

bool True if the window lost focus in the current frame, false otherwise.

Description

Checks if the window lost input focus during the current frame.

Use this in MonoBehaviour.Update, MonoBehaviour.FixedUpdate, or MonoBehaviour.LateUpdate to check if the window lost focus during the current frame. Use GameWindow.FocusedThisFrame to detect the window gaining focus.

using UnityEngine;
using UnityEngine.Windowing;

public class WindowingTest : MonoBehaviour
{
    GameWindow mainWindow;

    private void Awake()
    {
        mainWindow = GameWindow.Main;
    }

    private void Update()
    {
        if (mainWindow.UnfocusedThisFrame())
        {
            Debug.Log("Main window lost focus.");
        }
    }
}