NEW! Master Swift design patterns with my latest book! >>

How to draw a text string using Core Graphics

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 = [NSAttributedStringKey.font: UIFont(name: "HelveticaNeue-Thin", size: 36)!, NSAttributedStringKey.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)
}

Available from iOS 4.0 – see Hacking with Swift tutorial 27

Did this solution work for you? Please pass it on!

Other people are reading…

About the Swift Knowledge Base

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

Learn Swift faster!

Take your Swift learning to the next level: buy the Hacking with Swift e-book and get bonus material to help you learn faster!

MASTER SWIFT NOW
Buy Practical iOS 12 Buy Pro Swift Buy Swift Design Patterns Buy Practical iOS 11 Buy Swift Coding Challenges Buy Server-Side Swift (Vapor Edition) Buy Server-Side Swift (Kitura Edition) Buy Hacking with macOS Buy Advanced iOS Volume One Buy Hacking with watchOS Buy Hacking with tvOS Buy Hacking with Swift Buy Dive Into SpriteKit Buy Swift in Sixty Seconds Buy Objective-C for Swift Developers Buy Beyond Code

Was this page useful? Let me know!

Click here to visit the Hacking with Swift store >>