PreviewSceneStage 类表示基于单个预览场景的编辑上下文。
您可以通过实现继承自抽象 PreviewSceneStage 类的类来创建自定义类型的 Stage。您的自定义 Stage 应确保其控制的任何内容都移动到 Stage 控制的预览场景中。
您的自定义 Stage 类应实现 OnOpenStage 和 OnCloseStage。当您的 Stage 打开和关闭时，Unity 会调用这些方法；您不应自己调用它们。要打开自定义类型的 Stage，请使用 StageUtility.GoToStage。
| scene | 此 Stage 控制的预览场景。Stage 内容应移动到此场景中。 |
| stageHandle | 参见 Stage.stageHandle。 |
| OnCloseStage | 当 Stage 关闭时，Unity 会调用此方法。继承自 PreviewSceneStage 的类应在此方法中实现清理逻辑。 |
| OnOpenStage | 当 Stage 打开时，Unity 会调用此方法。继承自 PreviewSceneStage 的类应在此方法中实现初始化逻辑。 |
| hideFlags | 对象是否应隐藏、与场景一起保存或用户可修改？ |
| name | 对象的名称。 |
| assetPath | 与 Stage 关联的 Asset 文件的路径，相对于项目根文件夹。 |
| stageHandle | 此 Stage 的 StageHandle 结构。 |
| GetInstanceID | 获取对象的实例 ID。 |
| ToString | 返回对象的名称。 |
| FindComponentOfType | 返回给定类型的第一个活动加载的对象。 |
| FindComponentsOfType | 返回给定类型的所有活动加载对象的列表。 |
| GetCombinedSceneCullingMaskForCamera | 获取此 Stage 的场景剔除遮罩。 |
| CreateHeaderContent | 为该 Stage 创建标题内容。层次结构窗口标题和场景视图面包屑栏都使用此内容。 |
| GetHashForStateStorage | Unity 调用此方法以获取用于将 Stage 的状态保存到磁盘的哈希代码。 |
| OnDisable | 参见 ScriptableObject.OnDisable。 |
| OnEnable | 参见 ScriptableObject.OnEnable。 |
| OnFirstTimeOpenStageInSceneView | 对于特定 Asset 和特定场景视图，在首次打开 Stage 时，Unity 会调用此方法。 |
| OnReturnToStage | 当您返回到已打开的 Stage 时，Unity 会调用此方法。 |
| Destroy | 移除 GameObject、组件或资产。 |
| DestroyImmediate | 立即销毁对象 obj。强烈建议您使用 Destroy 代替。 |
| DontDestroyOnLoad | 加载新场景时不要销毁目标对象。 |
| FindAnyObjectByType | 检索类型为 type 的任何活动加载的对象。 |
| FindFirstObjectByType | 检索类型为 type 的第一个活动加载的对象。 |
| FindObjectsByType | 检索类型为 type 的所有加载对象的列表。 |
| Instantiate | 克隆对象 original 并返回克隆。 |
| InstantiateAsync | 捕获原始对象（必须与某些 GameObject 相关）的快照，并返回 AsyncInstantiateOperation。 |
| CreateInstance | 创建可脚本化对象的实例。 |
| bool | 对象是否存在？ |
| operator != | 比较两个对象是否引用不同的对象。 |
| operator == | 比较两个对象引用，查看它们是否引用同一对象。 |
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