How to make UILabel size dynamic?

Question

Objective-C

Greetings,
tell me which way to dig in
order to understand how to make the UILabel dimensions dynamic, i.e. as if in % ratio,
and the font size in UILabel changed accordingly.

Answer 1

adjustsFontSizeToFitWidth
But there need numberOfLine == 1

Answer 2

dig in the direction of sizeWithFont or boundingRectWithSize
these methods return the size of the container needed to fill the given line with the font, paragraph, etc. parameters.
UILabel won't resize dynamically for you