- (void)addHeaderButton {

    _headerButton = [UIButton buttonWithType:UIButtonTypeCustom];
    self.headerButton.frame = self.bounds;
    self.headerButton.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;
    [self.headerButton setTitleColor:[UIColor colorWithRed:(0.0/255.0) green:(51.0/255.0) blue:(102.0/255.0) alpha:(1.0)] forState:UIControlStateNormal];
    self.headerButton.titleLabel.font = [UIFont fontWithName:@"Nunito-Black" size:25];
    //[self.headerButton setFont:[UIFont  systemFontOfSize:25]];
    [self.headerButton addTarget:self action:@selector(headerButtonAction:) forControlEvents:UIControlEventTouchUpInside];

    [self.contentView addSubview:self.headerButton];
}