title: how to create Expandable Table view like Tree Structure in ios
body: <p>hi every one i need a expandable table view for my data,
  Is it Possible to create like this in tableView.In my Data each one having different Childs,below is my data</p>
  
  <pre><code>-A1
      -A1.1
          -A1.1.1
              A1.1.1.1
  +B1
  +C1
  +D1
  
  ----------------------
  +A1
  -B1
      +B1.1
  +C1
  +D1
  -----------------------
  +A1
  +B1
  +C1
  -D1
      +D1.1
      -D1.2
          +D1.2.1
          +D1.2.2
      +D1.3
  </code></pre>
  
  <p>Help me thanks in advance</p>