title: How to update tableview cells instead of reloading?
body: <p>I am building iOS Application using storyboards.</p>
  
  <p>I have a tableview for displaying multiple datas from database.</p>
  
  <p>Also i am using pull down refresh.</p>
  
  <p>In PullDownRefresh i called a method [(void)updateData] where i reload tableview.</p>
  
  <p>At that time image in the cell blinks abruptly while scrolling.</p>
  
  <p>So instead of reloading tableView, i want to update the tableView.</p>
  
  <p>That means i want to add new rows from the last cell.</p>
  
  <p>I am beginnner in iOS.Help is Appreciated.</p>