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