ios - prevent uitableView reloading -

i using uitableview in application , want prevent reloading in different cases: 1. when present modal view on it. 2. row selection happens.

i not calling [tableview reloaddata] in viewwillappear or viewdidappear. there anyway prevent reloading?

• (void)reloaddata; // reloads scratch. redisplays visible rows. because keep info visible rows, cheap. adjust offset if table shrinks
  maybe can in change datasource