Finding out if UIButton's title was adjusted to fit width

[Werdan]

Is there any way to find out whether the UILabel's title was adjusted to fit width?

I have few labels with different titles, which get generated and I need to know if font size of any one of them was reduced.

Referring to methods "lineHeight", "capHeight" does not give appropriate result. It seems to me that none of them changes when font size gets adjusted.

Thanks in advance!