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How do I change the font size of a UILabel in Swift

February 16, 2025

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How do I change the font size of a UILabel in Swift

Modifying the quality of matter inside your iOS app is a cardinal facet of creating a polished and person-affable interface. 1 of the about communal duties you’ll brush is adjusting the font dimension of a UILabel. This seemingly elemental act tin importantly contact readability and general plan. This usher gives a blanket overview of however to alteration the font dimension of a UILabel successful Swift, overlaying assorted methods, champion practices, and existent-planet examples to empower you to make dynamic and visually interesting matter parts.

Utilizing UIFont to Set Font Measurement

The about easy attack to altering a UILabel’s font measurement includes utilizing the UIFont people. You tin initialize a fresh font with the desired measurement and delegate it to the description’s font place. This permits for exact power complete the matter dimension, guaranteeing it aligns absolutely with your plan specs.

For illustration:

myLabel.font = UIFont.systemFont(ofSize: 20) 

This units the font to the scheme font with a dimension of 20 factors. You tin besides specify antithetic font weights (e.g., daring, italic) utilizing variations of the systemFont technique.

Dynamic Font Sizing with UIFontMetrics

To accommodate customers’ accessibility settings and most popular matter sizes, leverage UIFontMetrics. Launched successful iOS eleven, this people permits you to make scalable fonts that set routinely primarily based connected the person’s Dynamic Kind settings. This ensures your matter stays legible and accessible to each customers, careless of their idiosyncratic preferences.

Illustration:

fto metrics = UIFontMetrics(forTextStyle: .assemblage) myLabel.font = metrics.scaledFont(for: UIFont.systemFont(ofSize: 17)) 

This scales the font based mostly connected the assemblage matter kind, guaranteeing consistency with the general scheme font measurement. This attack is important for creating inclusive and accessible apps.

Adjusting Font Measurement with AttributedString

For much granular power complete matter formatting, usage NSAttributedString. This permits you to use antithetic font sizes, kinds, and colours to circumstantial parts of matter inside a azygous description. This is peculiarly utile for highlighting key phrases, creating visually affluent matter parts, oregon implementing customized typography.

Illustration:

fto attributedString = NSMutableAttributedString(drawstring: "This is a trial drawstring.") attributedString.addAttribute(.font, worth: UIFont.systemFont(ofSize: 24), scope: NSRange(determination: zero, dimension: four)) myLabel.attributedText = attributedString 

This codification snippet will increase the font measurement of the archetypal 4 characters (“This”).

Champion Practices for Font Measurement Direction

Sustaining consistency and readability is paramount. Debar utilizing excessively ample oregon tiny font sizes. Adhere to Pome’s Quality Interface Tips for advisable font sizes and see utilizing a constricted figure of font sizes inside your app to make a cohesive and nonrecreational expression. Appropriate font measurement direction contributes importantly to a affirmative person education.

  • Keep consistency successful font utilization.
  • Prioritize readability by deciding on due font sizes.

Present’s a speedy usher connected selecting due font sizes:

  1. Assemblage matter: 17pt
  2. Headings: 20-28pt
  3. Tiny matter: 13pt

See the discourse of your app and set accordingly. For illustration, a speechmaking app mightiness payment from bigger font sizes, piece a inferior app mightiness prioritize smaller, much compact matter. For further accusation connected typography and accessibility, mention to Pome’s Quality Interface Tips.

[Infographic Placeholder: Illustrating antithetic font sizes and their contact connected readability]

Existent-Planet Illustration: Dynamically Resizing Matter Based mostly connected Instrumentality Predisposition

Ideate a script wherever you privation the font dimension of a description to alteration based mostly connected the instrumentality predisposition. Successful scenery manner, you mightiness privation bigger matter to return vantage of the accrued surface width. You tin accomplish this by listening for predisposition adjustments and updating the description’s font measurement accordingly. This dynamic attack ensures optimum readability successful some picture and scenery orientations.

// Illustration (simplified) override func viewWillTransition(to dimension: CGSize, with coordinator: UIViewControllerTransitionCoordinator) { ace.viewWillTransition(to: dimension, with: coordinator) if UIDevice.actual.predisposition.isLandscape { myLabel.font = UIFont.systemFont(ofSize: 24) } other { myLabel.font = UIFont.systemFont(ofSize: 17) } } 

Selecting the correct font dimension enhances person education and ensures your communication is intelligibly communicated. By leveraging the strategies mentioned – utilizing UIFont, UIFontMetrics, and NSAttributedString – you tin exactly power the quality of matter inside your app, starring to a much polished and nonrecreational last merchandise. Retrieve to prioritize readability, accessibility, and consistency to make a genuinely person-affable interface. Research additional customization choices and refine your abilities by experimenting with antithetic fonts and sizes inside your tasks. This fingers-connected attack volition solidify your knowing and let you to make dynamic and visually interesting matter parts that heighten the general person education. Larn much astir precocious matter styling methods.

  • SwiftUI
  • UILabel Customization

FAQ

Q: However bash I alteration the font colour of a UILabel?

A: Usage the textColor place of the UILabel: myLabel.textColor = .reddish

By mastering these strategies and paying attraction to champion practices, you tin importantly heighten the ocular entreaty and usability of your iOS purposes. Commencement implementing these methods successful your tasks present to make participating and person-affable interfaces.

Question & Answer :
description.font.pointSize is publication-lone, truthful I’m not certain however to alteration it.

You tin bash it similar this:

description.font = UIFont(sanction: description.font.fontName, dimension: 20) 

Oregon similar this:

description.font = description.font.withSize(20) 

This volition usage the aforesaid font. 20 tin beryllium any measurement you privation of class.

Line: The second action volition overwrite the actual font importance to daily truthful if you privation to sphere the font importance usage the archetypal action.

Swift three Replace:

description.font = description.font.withSize(20) 

Swift four Replace:

description.font = description.font.withSize(20) 

oregon

description.font = UIFont(sanction:"fontname", measurement: 20.zero) 

and if you usage the scheme fonts

description.font = UIFont.systemFont(ofSize: 20.zero) description.font = UIFont.boldSystemFont(ofSize: 20.zero) description.font = UIFont.italicSystemFont(ofSize: 20.zero)