title: blank screen appears when click on UILabel in swift
body: <p>i'm trying to open iPhone call screen with selected number when click on UIlabel which is hyperlink in swift.</p>
  
  <p>a blank screen appears for 1 second and goes. No iPhone call screen appears. Don't know what is wrong in my code.</p>
  
  <p>Code in viewDidLoad</p>
  
  <pre><code>let strPhone = "080 2854 2105"
  
  let attributedPhoneStr = NSMutableAttributedString(string:strPhone, attributes:[NSLinkAttributeName: NSURL(string: "http://aerospace.honeywell.com")!])
  
  lblPhoneContact.attributedText = attributedPhoneStr
  
  lblPhoneContact.userInteractionEnabled = true
  
  let gestureRecognizer = UITapGestureRecognizer(target: self, action: Selector("labelPressed"))
  
  lblPhoneContact.addGestureRecognizer(gestureRecognizer)
  </code></pre>
  
  <p>Function labelPressed</p>
  
  <pre><code>func labelPressed() {      
  
  let url:NSURL = NSURL(string: "tel://08028542105")!
  
  UIApplication.sharedApplication().openURL(url)
  
  }
  </code></pre>
  
  <p>what is wrong or missing in my code.
  I tried running on my iPhone device.</p>