title: Display data based on dropdown menu list
body: <p>I'm new in ios development,
  i want to display my data based on dropdown menu,
  when user click on dropdown button [there are 3 department(Ex. "one","two","three")] and select "one",now in one department some data is there,that data show in uitableview dynamically.</p>
  
  <p>need help...give any example..</p>