title: NSString and NSDictionary valueForKey - nil?
body: <p>How can I put a default value into my string if getting data from an empty key/value in a dictionary.</p>
  
  <p>so <code>[myObject setMyString:[dictionary valueForKey:@"myKey"]];</code></p>
  
  <p>So then if I did <code>NSString *newString = myObject.myString</code> I would get an <code>unrecognized selector error</code>.</p>
  
  <p>So again, I simply need a way to insert a default string if the key value is empty;</p>