How to make attributed text bold in swift?

Question

I have two NSAttributedString , where I am trying to make first one in bold.. I am trying to make it bold but it is not working.

var attrTitle : NSAttributedString
var attrBody : NSAttributedString


let mutableAttributedString = NSMutableAttributedString()
    
let boldAttributedString = NSAttributedString(attributedString:attrTitle)
let regularAttributedString = NSAttributedString(attributedString:attrBody)
mutableAttributedString.append(boldAttributedString)
mutableAttributedString.append(regularAttributedString)
        

is there any way to make it bold..Thanks for help

Answer 1

Seems you missed bold attributes for title string, you can achieve it via NSAttributedString.Key.font with any bold font value.

let attrTitle = "Title"
let attrBody  = "Body"

let mutableAttributedString = NSMutableAttributedString()

let attributes = [NSAttributedString.Key.font : UIFont.boldSystemFont(ofSize: 15)]
let boldAttributedString = NSMutableAttributedString(string: attrTitle, attributes: attributes)
let regularAttributedString = NSAttributedString(attributedString: attrBody)

mutableAttributedString.append(boldAttributedString)
mutableAttributedString.append(regularAttributedString)

Answer 2

You can add attribute like this

   let boldAttributedString = NSMutableAttributedString(attributedString: attrTitle)
        
    boldAttributedString.addAttributes([.font : UIFont.boldSystemFont(ofSize: 15)], range: NSMakeRange(0, boldAttributedString.length))

Answer 3

Found a way to make it bold and still use NSAttributedString .

You have to assign the properties before hand.

var attrTitle : NSAttributedString
var attrBody : NSAttributedString

var mutableAttributedString = NSMutableAttributedString()
        
//Properties
let boldFont = UIFont.boldSystemFont(ofSize: //your size)
let attributes = [NSAttributedString.Key.font: boldFont]
       
        
let boldAttributedString = NSAttributedString(string: attrTitle.string, attributes: attributes)
let regularAttributedString = NSAttributedString(attributedString:attrBody)
mutableAttributedString.append(boldAttributedString)
mutableAttributedString.append(regularAttributedString)

Also remember that if you want to display the attributed string you need to call .attributedText property of your object before assignment.

Hope this helps.