调整UILabel字体大小，而不使用.adjustsFontForContentSizeCategory

Question

I have two UILabels which I need to adjust the font size in order to properly fit the text (namely in smaller, older devices).

This would be easily solved with the .adjustsFontSizeToFitWidth property but the thing is that, as both UILabels are near one another and convey similar information, I want them to have the same font size (and adjustsFontSizeToFitWidth will adjust them independently).

So, what I was thinking to do would be to, somehow (this is where I need help) calculate what would the font size need to be for both the labels and use the smallest on both.

Any ideas on how to do this? Both labels are multiline (2 lines) and they always have the same size.

Thanks in advance.

Answer 1

What you could do have the .adjustsFontSizeToFitWidth property true, get font of smallest one, then compare the two widths and set the width of both to the smallest one. Example in pseudo code:

.adjustsFontSizeToFitWidth = true
var fontSizeOne = labelOne.fontSize
var fontSizeTwo = labelTwo.fontSize

if(fontSizeOne < fontSizeTwo)
  {
    labelTwo.fontSize = labelOne.fontSize
  }
else
  {
    labelOne.fontSize = labelTwo.fontSize
  }

Answer 2

You could make @Will's answer ever shorter using the min function:

    labelOne.adjustsFontSizeToFitWidth = true 
    labelTwo.adjustFontSizeToFitWidth = true

    var fontSizeOne = labelOne.font.pointSize
    var fontSizeTwo = labelTwo.font.pointSize

    var min = min(fontSizeOne, fontSizeTwo)
    labelOne.font = UIFont.systemFont(ofSize: min))
    labelTwo.font = labelOne.font