DeMaTianJi/Assets/TianJiSprite/UIBGP.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UI;

public class UIBGP : MonoBehaviour
{
    public GameObject topGame;
    public bool isCenter=false;
    Vector3 initV3;
    // Start is called before the first frame update
    void Awake()
    {
        initV3 = this.GetComponent<RectTransform>().anchoredPosition;
    }

    // Update is called once per frame
    void Update()
    {
        if(topGame)
        {
            initV3 = new Vector3(initV3.x,-topGame.GetComponent<RectTransform>().sizeDelta.y,initV3.z);
        }

        float bl = (float)Screen.width / 430f;
        float bl2 = (float)Screen.height / 932f;

        if(bl>bl2)
        {
            this.transform.localScale = new Vector3(bl2,bl2,bl2);
        }else
        {
            this.transform.localScale = new Vector3(bl, bl, bl);

        }
         
        this.GetComponent<RectTransform>().anchoredPosition= new Vector2(initV3.x,initV3.y* this.transform.localScale.x);
    
        if(isCenter)
        {
            this.GetComponent<RectTransform>().sizeDelta =new Vector2(430,   ((float)Screen.height -   (-this.GetComponent<RectTransform>().anchoredPosition.y+100*this.transform.localScale.x))/this.transform.localScale.x);
        }
    }
}