title: convert NSString into NSAttributedString without alloc init
body: <p>I want to convert <code>NSString</code> into <code>NSAttributedString</code>.
  But i always have to do </p>
  
  <pre><code> NSAttributedString *useDict1=[[NSAttributedString alloc] initWithString:@"String"];
  </code></pre>
  
  <p>Is there any other way such that i don't have to allocate the <code>Dictionary</code> every time, but just give the string?</p>