title: get value JSON from NSdictionary
body: <p>I have a dict who look like that:</p>
  
  <pre><code>{
      "from": 0,
      "to": 1412045889232,
      "series": [
          {
              "component": "Table",
              "points": [
                  {
                      "ts": "1409745374148", //time stamps
                      "value": "34"
                  },
                  {
                      "ts": "1409745564148",
                      "value": "36"
                  }
              ]
          }
   {
              "component": "Table2",
              "points": [
                  {
                      "ts": "1409745374148", //time stamps
                      "value": "43"
                  },
                  {
                      "ts": "1409745564148",
                      "value": "39"
                  }
              ]
          }
      ]
  }
  </code></pre>
  
  <p>i can get the from and to easily.
  the series also:</p>
  
  <pre><code>NSLog(@"/n Fetched component = %@", [[dict objectForKey:@"series"] valueForKey:@"component"] );
  NSLog(@"/n Fetched points = %@", [[dict objectForKey:@"series"] valueForKey:@"points"] );
  </code></pre>
  
  <p>What i want is getting the value for a define ts 
  any idea?</p>