How to use iOS13 font picker

iOS13 font picker example

// Add this to your preferences class 
-(void)pickFont {
    UIFontPickerViewControllerConfiguration *config = [[UIFontPickerViewControllerConfiguration alloc] init];
    config.includeFaces = YES;
    config.displayUsingSystemFont  = NO;

    UIFontPickerViewController *fontPicker = [[UIFontPickerViewController alloc] initWithConfiguration:config];
    fontPicker.delegate = self;
    [self presentViewController:fontPicker animated:YES completion:nil];
}

-(void)fontPickerViewControllerDidPickFont:(UIFontPickerViewController *)fontPicker {
    UIFontDescriptor *descriptor = fontPicker.selectedFontDescriptor;
    NSError *error = nil;
    NSData *encodedDescriptor = [NSKeyedArchiver archivedDataWithRootObject:descriptor requiringSecureCoding:NO error:&error];

    HBPreferences *pfs = [[HBPreferences alloc] initWithIdentifier:@"com.esquilli.viper"];
    [pfs setObject:encodedDescriptor forKey:@"CustomFont"];
    
    CFNotificationCenterPostNotification(CFNotificationCenterGetDarwinNotifyCenter(), (CFStringRef)kReloadPrefs, nil, nil, true);
    [fontPicker dismissViewControllerAnimated:YES completion:nil];
}

// Delegate
@interface Class : Anotheclass<UIFontPickerViewControllerDelegate>
...
@end

This worked for me. thank you very much!