Swift/Objective-c Support for IOS project?

:information_source: Attention Topic was automatically imported from the old Question2Answer platform.
:bust_in_silhouette: Asked By etamity
:warning: Old Version Published before Godot 3 was released.

on IOS export, the godot engine has been compiled into godot_opt.iphone file.
but there is not entry file for Objective-c/swfit,
For example, when you want to add push notification function, admob, or google analytics function, if you want to use some cocoa component or code, how can you do that?