Q:

iOS change font size programmatically not work

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        self.backgroundColor = [UIColor clearColor];
        if ([[UIDevice currentDevice].systemVersion floatValue] < 7.0f) {
            self.textLabel.backgroundColor = [UIColor whiteColor];
        }

        _topUserNewName= [[UILabel alloc] init];
        _topUserNewName.textAlignment = NSTextAlignmentLeft;
        _topUserNewName.backgroundColor = [UIColor clearColor];
        _topUserNewName.font = [UIFont fontWithName:@"HelvaticaNeue-Regular" size:5.0];
        _topUserNewName.textColor = [UIColor colorWithRed:(47/255.0) green:(55/255.0) blue:(65/255.0) alpha:1];
        _topUserNewName.frame = CGRectMake(66, 8, 215, 21);

        _topUserName= [[UILabel alloc] init];
        _topUserName.textAlignment = NSTextAlignmentLeft;
        _topUserName.backgroundColor = [UIColor clearColor];
        _topUserName.font = [UIFont fontWithName:@"HelvaticaNeue-Regular" size:10.0];
        _topUserName.textColor = [UIColor colorWithRed:(145/255.0) green:(212/255.0) blue:(210/255.0) alpha:1];
        _topUserName.frame = CGRectMake(66, 37, 210, 21);

        [self.contentView addSubview:_topUserNewName];
        [self.contentView addSubview:_topUserName];

        self.selectionStyle = UITableViewCellSelectionStyleNone;
    }
    return self;
}

This codes in my table cell class. I want to change font size with programmatically right here when i change size nothing change ? 
i researched on google this rule is right but not work any idea ? 

A:

The name HelveticaNeue-Regulardoes not actually exist. This should be [UIFont fontWithName:@"HelvaticaNeue" size:10.0];.
You can see the list of all font names here : http://iosfonts.com/

