Check if NSFont is bold in Swift

Question

I am writting unit test checking the format of a generated NSAttributedString.

I can extract the font like this:

if let font = attributedString.attributesAtIndex(0, effectiveRange: nil) as? NSFont {
    ...
}

Given this NSFont instance, how can I check if it is bold or not?

Please check this it could help you http://stackoverflow.com/questions/9234587/name-and-size-from-nsfont — Gopal Devra, Jul 15 '16 at 18:07

score 7 · Accepted Answer · answered Jul 15 '16 at 21:11

You can check your font traits like this:

let descriptor = font.fontDescriptor
let symTraits = descriptor.symbolicTraits
let traitSet = NSFontTraitMask(rawValue: UInt(symTraits))
let isBold = traitSet.contains(.BoldFontMask))

But I'm not sure if isBold would be true for all seemingly-bold fonts.

score 2 · Answer 2 · answered Apr 02 '18 at 03:06

2

Updated answer for Swift 4 and with an NSFont extension:

extension NSFont {
    var isBold: Bool {
        return fontDescriptor.symbolicTraits.contains(.bold)
    }
}

answered Apr 02 '18 at 03:06

LuisCien

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Check if NSFont is bold in Swift

2 Answers2