title: how to know which Search Bar is Active?
body: <p>now I have 2 search bar at one page</p>
  
  <p>the first problem is How can I make a search button always show although no text at searchbar.text?</p>
  
  <p>the second problem is, I have a Table View that Will show a different list expend which search bar I choose, how can I do it well?</p>
  
  <p>I can set a variable that change everytime the search bar is active. However is there a way to see which search bar is currently the active search bar?</p>