Swift version: 5.2
To draw text in Core Graphics is trivial because every Swift string has a built-in draw(with:)
method that takes an array of attributes and a position and size. There is, like always, some Core Graphics set up work to do, but this next code snippet is a complete example you can re-use easily:
let renderer = UIGraphicsImageRenderer(size: CGSize(width: 512, height: 512))
let img = renderer.image { ctx in
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.alignment = .center
let attrs = [NSAttributedString.Key.font: UIFont(name: "HelveticaNeue-Thin", size: 36)!, NSAttributedString.Key.paragraphStyle: paragraphStyle]
let string = "How much wood would a woodchuck\nchuck if a woodchuck would chuck wood?"
string.draw(with: CGRect(x: 32, y: 32, width: 448, height: 448), options: .usesLineFragmentOrigin, attributes: attrs, context: nil)
}
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Available from iOS 4.0 – see Hacking with Swift tutorial 27
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
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