title: Failed to save double Value in NSUSerDefault
body: <p>Hi everybody :) i want to save a double Value into NSUserDefault like this:</p>
  
  <pre><code>NSUserDefaults *startValues = [NSUserDefaults standardUserDefaults];
  
  [startValues setDouble:[[self.dataList objectAtIndex:indexPath.row]doubleValue] forKey:@"lat"];
  
  [startValues synchronize];
  </code></pre>
  
  <p>I get no Errors or Warnings from Xcode, but when i run the Code, it crashes with the Message:</p>
  
  <pre><code>-[__NSCFDictionary doubleValue]: unrecognized selector sent to instance
  </code></pre>
  
  <p>I also tried to split up the Code like:</p>
  
  <pre><code>double lat = [[self.dataList objectAtIndex:indexPath.row]doubleValue];
  
      [startValues setDouble:lat forKey:@"lat"];
  </code></pre>
  
  <p>but of course, i get the same error. Whats the Problem?</p>
  
  <p>Thanks for your time and help :)</p>