RightBarButon

 //rightBar button

    UIButton *rightButton = [[UIButton alloc]initWithFrame:CGRectMake(0, 0, 34, 34)];

    [rightButton setImage:[UIImage imageNamed:@"share_details"] forState:UIControlStateNormal];

    [rightButton addTarget:self action:@selector(doShare) forControlEvents:UIControlEventTouchUpInside];

    UIBarButtonItem *rightBarBtn = [[UIBarButtonItem alloc]initWithCustomView:rightButton];

    self.navigationItem.rightBarButtonItem = rightBarBtn;