i'm trying to style the navigation bar properly, i need to change the font to helvetica neue with a size point of 19. I've ever used this code but i've notice that now doesn't work as well:
navigationController?.navigationBar.titleTextAttributes = [NSFontAttributeName: UIFont(name: "HelveticaNeue-Light", size: 19)]
this happens because the type of NSFontAttributeName has changed to String, i've tried to fix it with
navigationController?.navigationBar.titleTextAttributes = [NSFontAttributeName: "HelveticaNeue-Light, 19"]
but the compiler continue to give me an error related to point size in font, how can i fix it?
The UIFont
constructor is returning an optional (UIFont?
) which you must unwrap to use. Add !
if you're sure you have a valid font name:
Swift 4.2:
navigationController?.navigationBar.titleTextAttributes = [NSAttributedString.Key.font: UIFont(name: "HelveticaNeue-Light", size: 19)!]
Swift 4:
navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.font: UIFont(name: "HelveticaNeue-Light", size: 19)!]
Swift 3:
navigationController?.navigationBar.titleTextAttributes = [NSFontAttributeName: UIFont(name: "HelveticaNeue-Light", size: 19)!]
Note: If you are setting a font with a static name in your code, then force unwrapping is safe once you’ve verified you’re using a valid font name. If you are getting the font name from an external source (the user or a server), you will want to use optional binding such as if let font = UIFont(...
or guard let font = UIFont(...
to safely unwrap the font before use.
With Swift 4 NSFontAttributeName is deprecated, you can use NSAttributedStringKey values to set attributes.
if let fontStyle = UIFont(name: "HelveticaNeue-Light", size: 19) { navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.font: fontStyle] }
With Swift 4.2 NSAttributedStringKey
is changed as NSAttributedString.Key
.
if let fontStyle = UIFont(name: "HelveticaNeue-Light", size: 19) { navigationController?.navigationBar.titleTextAttributes = [NSAttributedString.Key.font: fontStyle] }
For more options for NSAttributedStringKey you can visit this link https://developer.apple.com/documentation/foundation/nsattributedstringkey/
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With