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

public class UICameraScale : MonoBehaviour
{
    public float standard_width;       //初始宽度  
    public float standard_height;      //初始高度  
    private float ScreenWith;          //当前设备宽度  
    private float ScreenHeight;        //当前设备高度  
    void Start()
    {
        AutoScale();
    }

    private void AutoScale()
    {
        Debug.Log(Screen.currentResolution);
        //屏幕矫正比例  
        float adjustor = 0f;
        //获取设备宽高  
        ScreenWith = Screen.width;
        ScreenHeight = Screen.height;
        //计算宽高比例  
        float standard_aspect = standard_width / standard_height;
        float device_aspect = ScreenWith / ScreenHeight;
        //计算矫正比例  
        if (device_aspect < standard_aspect)
        {
            adjustor = standard_aspect / device_aspect;
        }
        CanvasScaler canvasScalerTemp = GetComponent<CanvasScaler>();
        if (adjustor == 0)
        {
            canvasScalerTemp.matchWidthOrHeight = 1;
        }
        else
        {
            canvasScalerTemp.matchWidthOrHeight = 0;
        }
    }
    void Update()
    {
        if (ScreenWith != Screen.width || ScreenHeight != Screen.height)
        {
            AutoScale();
        }
    }
}