title: UipickerView how to know when it stops moving
body: <p>I am facing a problem with UIpickerview. In my app I implemented an uipickerview for displaying the country list, I add a toolbar above the uipickerview that having two buttons (Cancel and DONE). If i press Cancel it simply hides the uipickerview and all is fine.
  But if I use DONE button I get the value of selected row from component and hides the pickerview it works fine problem arise if someone moves the countrylist very fast as he can, suddenly he press DONE button then uipickerview hides but did not return the selected row value from component. Thats my problem.. </p>
  
  <p>It may handle if i can track when picker movement stops then need to display DONE button otherwise (in case of moving state ) DONE button will be hidden.</p>
  
  <p>Can some one have any idea or any alternate way to solve this issue.</p>
  
  <p>Thanks,</p>