Change UIViewController Font Size

[losingSkillz]

Hi all
I am using the UIViewController but i would like to change the font size of the text. I do not see a property on how to set the font size for the viewcontroller.

i also tried to make my own label and adding that view to

self.navigationItem.titleView

which did not displa any text.

I have seen this used in the music player app displaying the song info.

thanks for any help in advance.