How to change the allignment of a character in Attributed String

Question

This is what I want to achieve.

I used an attributedString, took the range of character $ and applied attributes to it like below way:

let str = "$4"
let r1 = str.range(of: "$")!
let n1 = NSRange(r1, in: str)
let atrStr = NSMutableAttributedString(string: str)
atrStr.addAttributes([NSAttributedStringKey.font : UIFont.systemFont(ofSize: 25)], range: n1)
atrStr.addAttributes([NSAttributedStringKey.foregroundColor : UIColor.lightGray], range: n1)
lbl.attributedText = atrStr

But the result is

How do I change the allignment of that specific character from bottom to top?

Have a look at this question: https://stackoverflow.com/questions/21415963/nsattributedstring-superscript-styling/21603232 — Nick, Mar 27 '18 at 10:02

Reinier Melian · Accepted Answer · 2020-08-22T18:51:38.143

5

You need to use baselineOffset of NSMutableAttributedString

calculate the diference between your two fonts sizes

let offset = baseFont.capHeight - smallFont.capHeight

Add the new attribute called baselineOffset

atrStr.addAttributes([NSAttributedString.Key.baselineOffset:offset], range: n1)

edited Aug 22 '20 at 18:51

answered Mar 27 '18 at 10:02

Reinier Melian

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Hey @Reinier Melian, I am applying baselineOffset on CATextLayer but it's not working can you help? – Nick Aug 17 '20 at 12:09
@Nick i will review and update my answer – Reinier Melian Aug 21 '20 at 20:37
@Nick I have an example working you can post this as new question? – Reinier Melian Aug 22 '20 at 18:50

How to change the allignment of a character in Attributed String

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