ios - How to add a plus button in a navigation bar when the edit button is pressed? -

i writing simple app tableview controller. view has navigation bar, , has edit button. add plus button in top left corner when content being edited , edit button has been pressed.

i added button using following prewritten code:

// uncomment following line display edit button in navigation bar //this view controller.         self.navigationitem.rightbarbuttonitem = self.editbuttonitem() 

i don't know if there method called when edit button created pressed, think solve problem created add plus button in method.

override setediting:animated: on view controller. it'll called everytime editing state changes.

make sure call super first.