title: SFSafariViewController init method forced to use iOS11 supported version
body: <p>With the recent update on Xcode 9 Beta and iOS11 preview, there are some changes to SFSafariViewController <code>init</code> methods.</p>
  
  <pre><code>@available(iOS 11.0, *)
  public init(url URL: URL, configuration: SFSafariViewController.Configuration)
  
  @available(iOS, introduced: 9.0, deprecated: 11.0)
  public convenience init(url URL: URL, entersReaderIfAvailable: Bool)
  </code></pre>
  
  <p>There is one new <code>init</code> method that is supported from iOS11 onwards while the currently available init method will be deprecated by iOS11. The problem is that the current method is not exposed and could not be overwritten. This forces the use of the new <code>init</code> method if we want to use the beta to run the existing project. Has anyone found a way to use the existing <code>init</code> method in the new Xcode Beta?</p>
  
  <p>Edit: For clarification, this is a snippet of the <code>init</code> method in my subclass</p>
  
  <pre><code>class BPSafariViewController: SFSafariViewController {
      override init(url URL: URL, entersReaderIfAvailable: Bool) {
          super.init(url: URL, entersReaderIfAvailable: entersReaderIfAvailable)
          if #available(iOS 10.0, *) {
              preferredControlTintColor = UIColor.BPUIColor()
          } else {
              view.tintColor = UIColor.BPUIColor()
          }
      }
  }
  </code></pre>