title: Swift code completion isn't working
body: <p>I installed <strong>Xcode 6.0 beta</strong> and downloaded the <strong>iOS8</strong> library Documentation.
  but when i create a <strong>Swift</strong> project, try to typing code</p>
  
  <pre><code>func aa(){
      let format = NSDateFormatter()
      var pageData = format.
  }
  </code></pre>
  
  <p>I find Xcode can't dot any property and function. Am I missing any step?</p>
  
  <p><em>The problem is sloved, typing a whitespace can aid code completion</em></p>