运行时的场景管理。
| sceneCount | The total number of currently loaded scenes. |
| sceneCountInBuildSettings | Number of scenes in Build Settings. |
| CreateScene | Create an empty new scene at runtime with the given name. |
| GetActiveScene | Gets the currently active scene. |
| GetSceneAt | Get the scene at index in the SceneManager's list of added scenes. |
| GetSceneByBuildIndex | Get a scene struct from a build index. |
| GetSceneByName | Searches through the scenes added to the SceneManager for a scene with the given name. |
| GetSceneByPath | Searches all scenes added to the SceneManager for a scene that has the given asset path. |
| LoadScene | Loads the scene by its name or index in Build Settings. |
| LoadSceneAsync | Loads the scene asynchronously in the background. |
| MergeScenes | This will merge the source scene into the destinationScene. |
| MoveGameObjectToScene | Move a GameObject from its current scene to a new Scene. |
| SetActiveScene | Set the scene to be active. |
| UnloadSceneAsync | Destroys all GameObjects associated with the given scene and removes the scene from the SceneManager. |
| activeSceneChanged | Add a delegate to this to get notifications when the active scene has changed |
| sceneLoaded | Add a delegate to this to get notifications when a scene has loaded. |
| sceneUnloaded | Add a delegate to this to get notifications when a scene has unloaded |