Add text with different style to a existing label - ios

Question

I have a label with text and want to add more test in running time, but I want to add different style to this text that was add. Is there a way to do this?
This is the code
label.text = (label.text ?? "") + " \n \(userName)"
How do I add style to userName without changing the style of the label?

Answer 1

use attributed text in UILabel:
here some code.
a) some useful typedefs:
typealias AttrDict = [NSAttributedString.Key : Any]
a) create some styles:
func textAttribute() -> AttrDict{
let textFont = UIFont.systemFont(ofSize: 32)
let stdAttrib = [NSAttributedString.Key.font: textFont,
//NSParagraphStyleAttributeName: paragraphStyle2,
NSAttributedString.Key.foregroundColor: UIColor.red] as AttrDict
return stdAttrib
}
func smallTextAttribute() -> AttrDict{
let textFont = UIFont.systemFont(ofSize: 10)
let stdAttrib = [NSAttributedString.Key.font: textFont,
NSAttributedString.Key.foregroundColor: UIColor.green] as AttrDict
return stdAttrib
}
c) build Your attributed String:
func myAttributedString() -> NSAttributedString {
let pieces = ["hello", "word"]
let resultAttributed = NSMutableAttributedString()
var s = ""
s = pieces[0] + "\n"
resultAttributed.append(NSAttributedString(string: s,
attributes: stdTextAttribute() ))
s = pieces[1] + "\n"
resultAttributed.append(NSAttributedString(string: s,
attributes: smallTextAttribute() ))
return resultAttributed
}
d) put in Your label/textView:
....
class ViewController: UIViewController {
#IBOutlet weak var myLabel: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
myLabel.numberOfLines = 0
myLabel.attributedText = myAttributedString()
}
}
I made a GIST:
https://gist.github.com/ingconti/aefc78c6d0b22f5329f906094c312a21
PLS connect UIlabel..
:)

Answer 2

To do this, you need to use NSMutableAttributedString, NSAttributedString and use label.attributedText, How?
Doing this:
let userName = "StackOverflow"
let prefixText = NSAttributedString(string: "this is normal ")
let font = UIFont.systemFont(ofSize: 40)
let attributes: [NSAttributedString.Key: Any] = [
.font: font,
.foregroundColor: UIColor.blue
]
let userNameWithStyle = NSAttributedString(string: userName, attributes: attributes)
let finalString = NSMutableAttributedString(attributedString: prefixText)
finalString.append(userNameWithStyle)
self.label.attributedText = finalString
Image result