在我的iPhone视图中，我应该在哪里“保存”更改以“创建新的”对象?

I have a view that creates a new core data managed object, and fills in all the required properties and also allows optional ones. I originally had a "Done" button on the top left, and when that was pressed, I validated the object then saved and removed the view.I have a view that creates a new core data mana