How to set a custom font for entire iOS app without specifying size

Question

I'm trying to apply a custom font throughout my iOS app. I found that I could use:

 [[UILabel appearance] setFont:[UIFont fontWithName:@"Proxima Nova" size:17.0]];

• To set the default font and size for all UILabels. However, not all my UILabels share the same font size.

• In Set a default font for whole iOS app?, someone had the same concern, and was told to set the size parameter to 0.0 to only set the font and not font size.

• When I tried doing this, all the UILabel text in my app disappeared (because evidently iOS took the 0.0 font size literally).

Any suggestions as to how I can universally set a font but not size? Thanks a lot!

Solution 1

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self setFontFamily:@"FagoOfficeSans-Regular" forView:self.view andSubViews:YES];
}

-(void)setFontFamily:(NSString*)fontFamily forView:(UIView*)view andSubViews:(BOOL)isSubViews
{
    if ([view isKindOfClass:[UILabel class]])
    {
        UILabel *lbl = (UILabel *)view;
        [lbl setFont:[UIFont fontWithName:fontFamily size:[[lbl font] pointSize]]];
    }

    if (isSubViews)
    {
        for (UIView *sview in view.subviews)
        {
            [self setFontFamily:fontFamily forView:sview andSubViews:YES];
        }
    }    
}

Solution 2

Here is a solution in Objective-C, put this category anywhere you want to change UILabel Apperance without setting UILabel FontSize:

@implementation UILabel (SubstituteFontName)
- (void)setSubstituteFontName:(NSString *)name UI_APPEARANCE_SELECTOR {
    self.font = [UIFont fontWithName:name size:self.font.pointSize];
}
@end

Then, you can change the Apperance with:

[[UILabel appearance] setSubstituteFontName:@"SourceSansPro-Light"];

Solution 3

I've used the accepted answer in my project, but needed a more generic function, so it'll change the font to every one possible, also I've chose to set a mapping between some stock fonts to our custom fonts, so they'll be accessible via storybuilder and xib files as well.

+ (void)setupFontsForView:(UIView *)view andSubViews:(BOOL)isSubViews
{
    if ([view respondsToSelector:@selector(setFont:)] && [view respondsToSelector:@selector(font)]) {
        id      viewObj = view;
        UIFont  *font   = [viewObj font];

        if ([font.fontName isEqualToString:@"AcademyEngravedLetPlain"]) {
            [viewObj setFont:[UIFont fontWithName:PRIMARY_FONT size:font.pointSize]];
        } else if ([font.fontName hasPrefix:@"AmericanTypewriter"]) {
            [viewObj setFont:[UIFont fontWithName:SECONDARY_FONT size:font.pointSize]];
        }
    }

    if (isSubViews) {
        for (UIView *sview in view.subviews) {
            [self setupFontsForView:sview andSubViews:YES];
        }
    }
}

Solution 4

By writing the category for the Label we can change the fonts of entire app.

@implementation UILabel (CustomeFont)

-(void)awakeFromNib
{
    [super awakeFromNib];
    [self setBackgroundColor:[UIColor clearColor]];
    [self setFont:[UIFont fontWithName:@"Helvetica" size:self.font.pointSize]];
}

@end

Solution 5

Swift3 https://gist.github.com/dimohamdy/c47992e14c1a3ee3315c06e2480e121e

you can't set appearance for label font that make me create other value of default font and when i set the new font i get only the name of new font and old size of label and create other font and set this font

    //when you want to set font for all labels in Application
    UILabel.appearance().defaultFont =  UIFont.systemFont(ofSize: 15/*Any Value*/, weight: UIFontWeightThin)

extension UILabel{
    dynamic var defaultFont: UIFont? {
        get { return self.font }
        set {
          //get old size of lable font
          let sizeOfOldFont = self.font.pointSize 
          //get new name  of font
          let fontNameOfNewFont = newValue?.fontName
          self.font = UIFont(name: fontNameOfNewFont!, size: sizeOfOldFont)
        }
    }
     }

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