wxGameyuexiu/Assets/ButtomUICheck.cs

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

[ExecuteInEditMode]
public class ButtomUICheck : MonoBehaviour
{
    // Update is called once per frame
    void Update()
    {
        RawImage raw = this.transform.parent.GetComponent<RawImage>();
        RawImage raw2 = this.transform.GetComponent<RawImage>();

        this.GetComponent<RectTransform>().sizeDelta = new Vector2(raw2.texture.width, raw2.texture.height);

        float bl2 = 0;
        if (Screen.width<= Screen.height)
        {
            if ((raw.texture.width * this.transform.parent.localScale.x)> Screen.width)
            {
             //   Debug.Log("44444");
                bl2 = (float)Screen.width/((float)(raw2.texture.width) * this.transform.parent.localScale.x)   ;
              
            }
            else
            {
             //   Debug.Log("33333");
                bl2 = (float)raw.texture.width / ((float)(raw2.texture.width * this.transform.parent.localScale.x));
             
            }

        }
        else
        {
            if ((raw.texture.width * this.transform.parent.localScale.x) > Screen.width)
            {
               // Debug.Log("22222");
                bl2 = (float)Screen.width / ((float)(raw2.texture.width) * this.transform.parent.localScale.x);
           
            }
            else
            {
              //  Debug.Log("11111");
                 bl2 = (float)raw.texture.width / ((float)(raw2.texture.width));
               
            }
        }

        float bz = Screen.height / ((raw2.texture.height * bl2 * this.transform.parent.localScale.x));
        if(bz<3)
        {
            float js = 3 * ((raw2.texture.height * this.transform.parent.localScale.x));
            bl2 = Screen.height/ js;
        }

        this.transform.localScale = new Vector3(bl2, bl2, bl2);

    }
}