How to make part of a string bold in iOS?

Question

I want to make some part of a text string bold.

Eg: This is to be bold. This is normal string.

In Android, it can be easily achieved by using spannable s

Answer 1

Swift version:

@IBOutlet var theLabel: UILabel!
@IBOutlet var theTextview: UITextView!

        let theString = "Please satisfy three of the following password conditions" as NSString
        let theAttributedString = NSMutableAttributedString(string: theString as String)

        let boldString = "three"
        let boldRange = theString.range(of: boldString)
        let font = UIFont.boldSystemFont(ofSize: 20)

        theAttributedString.addAttribute(NSFontAttributeName, value: font, range: boldRange)
        theLabel.attributedText = theAttributedString
        theTextview.attributedText = theAttributedString