UITextField Bold animation

-(void)setEmailFieldBold:(BOOL)bold animated:(BOOL)animated
{
    CGFloat fontSize = self.emailTextField.font.pointSize;
    
    void (^setBold)(void) = ^{
        self.emailTextField.font = (bold) ? [UIFont QRBoldFontWithSize:fontSize]
        : [UIFont QRRegularFontWithSize:fontSize];
    };
 
	if (!animated)
    {
        [UIView transitionWithView:self.emailTextField
                          duration:0.35
                           options:UIViewAnimationOptionTransitionCrossFade
                        animations:^{ setBold(); }
                        completion:nil];
    }
    else
    {
        setBold();
    }
}