title: Alert error in swift
body: <p>I writing this code in swift and Xcode 6</p>
  
  <pre><code>@IBAction func Alert(sender : UIButton) {
    var alert : UIAlertView = UIAlertView(title: "Hey", message: "This is  one Alert",       delegate: nil, cancelButtonTitle: "Working!!")
  
      alert.show()
  }
  </code></pre>
  
  <p>Xcode doesn't show error in compilation.</p>
  
  <p>but in Simulator the APP fails and return the error:</p>
  
  <pre><code>(lldb)
  thread 1 EXC_BAD_ACCESS(code 1 address=0x20)
  </code></pre>