Swift NSAttributedString custom fonts

Question

I've read around for different solutions but nothing seems to work. This code creates a nil exception:

[NSFontAttributeName: UIFont(name: "Raleway-SemiBold", size: 16)!]

I have the fonts installed properly and they show up correctly in the app (target is set).
I tried to add the application provided fonts in the plist but nothing happened. I can't edit the items in the array: (they are item0 : string : Raleway-SemiBold.tff).

So basically I'm stuck... Sometimes Swift and Apple environments are great for a programmer, other times (most of the time), they are sooo faulty and need so many workarounds to reach the expected results.

Many thanks in advance for any help.

Answer 1

You're getting an exception because UIFont(name: "Raleway-SemiBold", size: 16) returns nil and you're force-unwrapping it with !.

Instead, use conditional unwrapping:

if let font = UIFont(name: "Raleway-SemiBold", size: 16) {
    let attributes = [NSFontAttributeName: font]
    // do something with attributes
} else {
    // The font "Raleway-SemiBold" is not found
}

You can use UIFont's familyNames() and fontNamesForFamilyName(_:) methods to get the exact string required.

Swift 4

if let font = UIFont(name: "Raleway-SemiBold", size: 16) {
    let attributes = [NSAttributedStringKey.font: font]
    // do something with attributes
} else {
    // The font "Raleway-SemiBold" is not found
}