NEW: Start my new Ultimate Portfolio App course with a free Hacking with Swift+ trial! >>

How to draw a text string using Core Graphics

Swift version: 5.2

Paul Hudson    @twostraws   

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)
}

Subscribe to Hacking with Swift+

Sponsor Hacking with Swift and reach the world's largest Swift community!

Available from iOS 4.0 – see Hacking with Swift tutorial 27

Similar solutions…

About the Swift Knowledge Base

This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.

BUY OUR BOOKS
Buy Pro Swift Buy Swift Design Patterns Buy Testing Swift Buy Hacking with iOS Buy Swift Coding Challenges Buy Swift on Sundays Volume One Buy Server-Side Swift (Vapor Edition) Buy Advanced iOS Volume One Buy Advanced iOS Volume Two Buy Advanced iOS Volume Three Buy Hacking with watchOS Buy Hacking with tvOS Buy Hacking with macOS Buy Dive Into SpriteKit Buy Swift in Sixty Seconds Buy Objective-C for Swift Developers Buy Server-Side Swift (Kitura Edition) Buy Beyond Code

Was this page useful? Let us know!

Average rating: 3.2/5

Link copied to your pasteboard.