winS.UnityEditor.UndoUndoSystem本页总览Class UndoSystem Events onUndo public event Action onUndo; onRedo public event Action onRedo; Methods AddCommand(IUndoCommand undoCommand) public void AddCommand(IUndoCommand undoCommand) Clear() Clears all undo command recorded by this winS.UnityEditor.Undo.UndoSystem. public void Clear()