每日一学27——Unity设备性能判断

学习来源：https://www.cnblogs.com/fws94/p/10143958.html

Unity根据设备性能设置质量，先根据这篇写了一个性能判断，稍微根据个人了解依据改了一下判断标准。下篇会增加根据设备性能修改质量Quality设置。
调用方式：

using UnityEngine;

public class Test : MonoBehaviour
{
    void Start()
    {
        Debug.Log(DevicePerformanceUtil.GetDevicePerformanceLevel());
    }
}

静态类：

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

public static class DevicePerformanceUtil
{
    /// <summary>
    /// 获取设备性能评级
    /// </summary>
    /// <returns>性能评级</returns>
    public static DevicePerformanceLevel GetDevicePerformanceLevel()
    {
        if (SystemInfo.graphicsDeviceVendorID == 32902)
        {
            //集显
            return DevicePerformanceLevel.Low;
        }
        else //NVIDIA系列显卡（N卡）和AMD系列显卡
        {
            Debug.Log("CPU核心数:" + SystemInfo.processorCount);
            //根据目前硬件配置三个平台设置了不一样的评判标准（仅个人意见）
#if UNITY_EDITOR || UNITY_STANDALONE_WIN
            if (SystemInfo.processorCount <= 2)
#elif UNITY_STANDALONE_OSX || UNITY_IPHONE
            if (SystemInfo.processorCount < 2)
#elif UNITY_ANDROID
            if (SystemInfo.processorCount <= 4)
#endif
            {
                //CPU核心数<=2判定为低端
                return DevicePerformanceLevel.Low;
            }
            else
            {
                //显存
                int graphicsMemorySize = SystemInfo.graphicsMemorySize;
                Debug.Log("显存:" + graphicsMemorySize);
                //内存
                int systemMemorySize = SystemInfo.systemMemorySize;
                Debug.Log("内存:" + systemMemorySize);
#if UNITY_EDITOR || UNITY_STANDALONE_WIN
                if (graphicsMemorySize >= 4000 && systemMemorySize >= 8000)
                    return DevicePerformanceLevel.High;
                else if (graphicsMemorySize >= 2000 && systemMemorySize >= 4000)
                    return DevicePerformanceLevel.Mid;
                else
                    return DevicePerformanceLevel.Low;
#elif UNITY_STANDALONE_OSX || UNITY_IPHONE
            if (graphicsMemorySize >= 4000 && systemMemorySize >= 8000)
                    return DevicePerformanceLevel.High;
                else if (graphicsMemorySize >= 2000 && systemMemorySize >= 4000)
                    return DevicePerformanceLevel.Mid;
                else
                    return DevicePerformanceLevel.Low;
#elif UNITY_ANDROID
            if (graphicsMemorySize >= 6000 && systemMemorySize >= 8000)
                    return DevicePerformanceLevel.High;
                else if (graphicsMemorySize >= 2000 && systemMemorySize >= 4000)
                    return DevicePerformanceLevel.Mid;
                else
                    return DevicePerformanceLevel.Low;
#endif
            }
        }
    }
}
public enum DevicePerformanceLevel
{
    Low,
    Mid,
    High
}