title: iOS Share Extension Grabbing URL in Swift
body: <p>I'm trying to create an iOS share extension in swift. When the user is in safari and opens the share extension, I want to be able to grab the URL and use it in my app. I know I can put the code below in the didSelectPost() function in the ShareViewController to get the text that the user enters in the share extension, but how do I get the URL of the web page the user is on when they click the share extension? I'm fairly new to iOS extensions, so any help would be much appreciated.</p>
  
  <pre><code> let shareDefaults = NSUserDefaults(suiteName: "groupName")
   shareDefaults?.setObject(self.contentText, forKey: "stringKey")
   shareDefaults?.synchronize()
  </code></pre>