Update runtime code

Assets/YooAsset/Runtime/CacheSystem/EVerifyResult.cs

@@ -4,7 +4,7 @@ namespace YooAsset
 	/// <summary>
 	/// 下载文件校验结果
 	/// </summary>
-	public enum EVerifyResult
+	internal enum EVerifyResult
 	{
 		/// <summary>
 		/// 文件不存在

Assets/YooAsset/Runtime/YooAssetsDriver.cs

@@ -1,22 +1,36 @@
-using UnityEngine;
+using System.Diagnostics;
+using UnityEngine;
 
 namespace YooAsset
 {
 	internal class YooAssetsDriver : MonoBehaviour
 	{
+		private static int LastestUpdateFrame = 0;
+
 		void Update()
 		{
+			DebugCheckDuplicateDriver();
 			YooAssets.Update();
 		}
-
 		void OnDestroy()
 		{
 			YooAssets.Destroy();
 		}
-
 		void OnApplicationQuit()
 		{
 			YooAssets.Destroy();
 		}
+
+		[Conditional("DEBUG")]
+		private void DebugCheckDuplicateDriver()
+		{
+			if (LastestUpdateFrame > 0)
+			{
+				if (LastestUpdateFrame == Time.frameCount)
+					YooLogger.Warning($"There are two {nameof(YooAssetsDriver)} in the scene. Please ensure there is always exactly one driver in the scene.");
+			}
+
+			LastestUpdateFrame = Time.frameCount;
+		}
 	}
 }