How to recognize a custom method from an iOS built-in method -

lets define class uiviewcontroller

@interface myviewcontroller : uiviewcontroller

so myviewcontroller used of uiviewcontroller class built-in methods loading view controller’s views such as

viewwillappear: viewdidappear:

and of custom methods defined such

elementstoadd: pressthis

is there way recognize custom method names built-in methods? there list of ios reserved built-in method names different classes?

ios methods

Jaimee