SF UI Text-Light(New san francisco) font doesn't work

Question

I am try to change font for a label but it's doesn't work font name:new New san francisco.

Import that font into project and add in info.plist and this is my code

labelname.font = [UIFont fontWithName:@"SF UI Text-Light" size:12];

If I use that's work fine

labelname.font = [UIFont fontWithName:@"HelveticaNeue" size:12];

But New san francisco font doesn't work. I don't know what I miss :(

Solution 1

That's happens because you use the wrong System name for the font. Try to use

labelname.font = [UIFont fontWithName:@"SFUIText-Light" size:12];

How to find System font names see here Adding custom fonts to iOS app finding their real names

Solution 2

I try to log the system font and find the font name is ".SFUIText-Light" ,so

labelname.font = [UIFont fontWithName:@".SFUIText-Light" size:12];

this is work.

Solution 3

Adding an update: you should be using the system font APIs in UIFont. For example:

UIFont.systemFont(ofSize: 12, weight: .light)

Apple specifically tells developers to no longer rely on a font name or file system representation for the system font.

As an aside, I made up a library for using many of the special features of the SF font in your app. Feel free to check it out: https://github.com/djfitz/SFFontFeatures

Solution 4

IMPORTANT, really.

Use this code, it is very, very useful. With it you can know the real name of the font.

let fontFamilyNames = UIFont.familyNames

for familyName in fontFamilyNames {
    print("------------------------------")
    print("Font Family Name = [\(familyName)]")

    let names = UIFont.fontNames(forFamilyName: familyName)
    print("Font Names = [\(names)]")
}

I show you an example.

The Font file (you must add it into your project, as any other file):

The Font file name in "Info.plist" (exactly the same name with the file extension):

Finally, the output in the log Debug (created by the code)

So, you can write this font name:

headerLabel.font = UIFont(name:"SFProDisplay-Heavy", size:30)

Use this code. It has saved me time. It is very useful (I think)!

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