Been slacking lately, but I hope I can make it up with this one. Let's say you need to display a price, and the currency, but the currency code should have a different font. You could have two labels, but that just complicates code and brings unwanted overhead, so let's use the same label.
This part will be common to all examples:
let priceFont = UIFont(name: "CustomFontBold", size: 15) // This is the part we will work on in the next steps. let currencyFont = [...] let attributedPrice = NSMutableAttributedString(string: price, attributes: [ NSFontAttributeName: priceFont, NSForegroundColorAttributeName: UIColor.normalText() ] ) attributedPrice.addAttribute(NSFontAttributeName, value: currencyFont, range: NSMakeRange(0, 3) ) [...] // Last step would go here.
Easiest task - same family, same size, different weight:
let currencyFont = UIFont( name: "CustomFontRegular", size: priceFont.pointSize // Just add / subtract if needed )
A bit more complex - same family, same weight, different size (we will make use of a previously mentioned technique):
let currencyFont = UIFont( name: priceFont.fontName, size: priceFont.pointSize - 2 )
The trickiest - same as above, but it will be aligned to the top, so we will need to add the following:
attributedPrice.addAttribute(NSBaselineOffsetAttributeName, value: priceFont.capHeight - currencyFont.capHeight, range: NSMakeRange(0, 3) )
As a bonus for the last example, in the case where we don't want all-caps for the currency (thus b will have a different height than a), I usually adjust for optical illusions where needed:
attributedPrice.addAttribute(NSBaselineOffsetAttributeName, value: priceFont.capHeight - currencyFont.capHeight + someOffset, range: NSMakeRange(0, 3) )
Unadjusted vs adjusted - maybe I'm wrong, but I find the adjusted one slightly more pleasing to the eye.
Merry Christmas, everybody!