Untitled

using UnityEngine;
using UnityEngine.InputSystem;

/// <summary>
/// Resizes a UI element with a RectTransform to respect the safe areas of the current device.
/// This is particularly useful on an iPhone X, where we have to avoid the notch and the screen
/// corners.
/// 
/// The easiest way to use it is to create a root Canvas object, attach this script to a game object called "SafeAreaContainer"
/// that is the child of the root canvas, and then layout the UI elements within the SafeAreaContainer, which
/// will adjust size appropriately for the current device./// </summary>
public class SafeAreaFitter : MonoBehaviour
{
    private Rect lastSafeArea;
    private RectTransform parentRectTransform;

    private RectTransform _boardRectTransformReference;
    
    private void Awake()
    {
        parentRectTransform = this.GetComponentInParent<RectTransform>();
        ApplySafeArea();
    }

    public bool IsSimulator => Touchscreen.current != null && Touchscreen.current.name != "Injected TouchScreen";
    
    private void Update()
    {
        if (lastSafeArea != Screen.safeArea || IsSimulator)
        {
            ApplySafeArea();
        }
    }

    private void ApplySafeArea()
    {
        Rect safeAreaRect = Screen.safeArea;

        float scaleRatio = parentRectTransform.rect.width / Screen.width;

        var left = safeAreaRect.xMin * scaleRatio;
        var right = -(Screen.width - safeAreaRect.xMax) * scaleRatio;
        var top = -(Screen.height - safeAreaRect.yMax) * scaleRatio;
        var bottom = safeAreaRect.yMin * scaleRatio;

        RectTransform rectTransform = GetComponent<RectTransform>();
        rectTransform.offsetMin = new Vector2(left, bottom);
        rectTransform.offsetMax = new Vector2(right, top);

        lastSafeArea = Screen.safeArea;
    }
}