更新Demo

更新Demo

UnityProject/Packages/YooAsset/Runtime/AssetSystem/Operations/UnloadSceneOperation.cs

@@ -0,0 +1,86 @@
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+namespace YooAsset
+{
+	/// <summary>
+	/// 场景卸载异步操作类
+	/// </summary>
+	public sealed class UnloadSceneOperation : AsyncOperationBase
+	{
+		private enum EFlag
+		{
+			Normal,
+			Error,
+		}
+		private enum ESteps
+		{
+			None,
+			UnLoad,
+			Checking,
+			Done,
+		}
+
+		private readonly EFlag _flag;
+		private ESteps _steps = ESteps.None;
+		private Scene _scene;
+		private AsyncOperation _asyncOp;
+
+		internal UnloadSceneOperation(string error)
+		{
+			_flag = EFlag.Error;
+			Error = error;
+		}
+		internal UnloadSceneOperation(Scene scene)
+		{
+			_flag = EFlag.Normal;
+			_scene = scene;
+		}
+		internal override void Start()
+		{
+			if (_flag == EFlag.Normal)
+			{
+				_steps = ESteps.UnLoad;
+			}
+			else if (_flag == EFlag.Error)
+			{
+				_steps = ESteps.Done;
+				Status = EOperationStatus.Failed;
+			}
+			else
+			{
+				throw new System.NotImplementedException(_flag.ToString());
+			}
+		}
+		internal override void Update()
+		{
+			if (_steps == ESteps.None || _steps == ESteps.Done)
+				return;
+
+			if (_steps == ESteps.UnLoad)
+			{
+				if (_scene.IsValid() && _scene.isLoaded)
+				{
+					_asyncOp = SceneManager.UnloadSceneAsync(_scene);
+					_steps = ESteps.Checking;
+				}
+				else
+				{
+					Error = "Scene is invalid or is not loaded.";
+					_steps = ESteps.Done;
+					Status = EOperationStatus.Failed;
+				}
+			}
+
+			if (_steps == ESteps.Checking)
+			{
+				Progress = _asyncOp.progress;
+				if (_asyncOp.isDone == false)
+					return;
+
+				_steps = ESteps.Done;
+				Status = EOperationStatus.Succeed;
+			}
+		}
+	}
+}