IOS 为整个APP设置一个字体，但是不指定字体大小 How to set a custom font for entire iOS app without s

- (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];        }    }    }

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