Is there any way to control settings inside iphone app rather than settings outside the app?

Is there any way开发者_如何学编程 to control settings inside iphone app rather than settings outside the app?

and

I could not find what kind of item I will add to plist in settings.bundle in order to change font type for example; Times New Roman to Calibri

I searched other references that people gave me 1 day ago but I could not find a point that makes this subject clear.

yes, but you have to build your own UI if you want to let the users edit them.