Make font grow together with UILabel (resized by Auto Layout) - how to do it in Interface Builder?

adjustsFontSizeToFitWidth property of UILabel will not grow up the font size, it is only for reducing according to the documentation: Normally, the label text is drawn with the font you specify in the font property. If this property is set to YES, however, and the text in the text property exceeds the label’s bounding rectangle, the receiver starts reducing the font size until the string fits or the minimum font size is reached.

But if you set font size big enough (say 200) and set adjustsFontSizeToFitWidth to YES, i think you would get interestingly valuable results.

And do not forget to set Baseline as Align Centers, otherwise your text may not be seen properly.

Please inform us about your results.

For those who come here by the title and need a simple solution (after hours of investigations):

Problem example: If you use auto layout and set the UILabel height to be proportional to the screen height, you will get a frame which is low for iPhone (landscape) and high for iPad. How to adjust font height automatically?

Solution: in Interface Builder,

1. Set "Autoshrink" to "Minimum font size" and set something for the size (it affects too-wide texts, but required for our solution).
2. Set "Lines" to be 0, and make font size higher than the frame you will get in iPad.

This will cause the font to get increased automatically to the current height.

You can accomplish what you want by setting Autoshrink in your storyboard. It will cause the label to shrink to a minimum scale/explicit size when the screen size gets smaller. Make it work on the biggest screen size and then ensure it shrinks to the size you want in the storyboard preview.