Unity3D 場景發佈質量設定，限制Unity3D 發佈不穩定

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

public class ProjectQualitySettings : MonoBehaviour
{

    public CustomQualityLevel QualityLevels = CustomQualityLevel.Ultra;

    private void Start()
    {
        QualitySettings.SetQualityLevel((int)QualityLevels);
    }

    public enum CustomQualityLevel
    {
        VeryLow=0,
        Low=1,
        Medium=2,
        High=3,
        VeryHigh=4,
        Ultra=5
    }

}