iphone - UILabel is not auto-shrinking text to fit label size

Question

I have this strange issue, and im dealing with it for more than 8 hours now.. Depending on situation i have to calculate UILabels size dynamically,
e.g
my UIViewController receives an event and i change UILabels size. from bigger to smaller. The size of my UILabel gets smaller and i get the correct needed size, but the text in my UILabel stays the same, the same font size and etc. I need the font to get smaller, for the whole text to fit the UILabel. So the question is how to make the text to fit my label with autoshrinking or something like that?

In my xib, UILabels autoshrink is checked, also number of lines is set to 0, and also my string has new line symbols ( ), and i've selected linebreakmode to wordwrap. Maybe anyone was in the same situation as i am now, and could help me? I would really appreciate that.

Thank's in advance!

EDIT: UILabel minimum font size is set to 10

Answer 1

In case you are still searching for a better solution, I think this is what you want:

A Boolean value indicating whether the font size should be reduced in order to fit the title string into the label’s bounding rectangle (this property is effective only when the numberOfLines property is set to 1).

When setting this property, minimumScaleFactor MUST be set too (a good default is 0.5).

Swift

var adjustsFontSizeToFitWidth: Bool { get set }

Objective-C

@property(nonatomic) BOOL adjustsFontSizeToFitWidth;

---

A Boolean value indicating whether spacing between letters should be adjusted to fit the string within the label’s bounds rectangle.

Swift

var allowsDefaultTighteningForTruncation: Bool { get set }

Objective-C

@property(nonatomic) BOOL allowsDefaultTighteningForTruncation;

Source.