title: Can't set httpBody on WKWebView POST request in iOS11.3
body: <p>following code</p>
  
  <pre><code>var webView: WKWebView!
  
  override func loadView() {
      super.loadView()
      self.webView = WKWebView(frame: .zero)
      view = webView
  }
  
  override func viewDidLoad() {
      super.viewDidLoad()
  
      var request = URLRequest(url: URL(string: "https://hosts")!)
      request.httpMethod = "POST"
      let bodyData = "data1=postData"
      request.httpBody = bodyData.data(using: .utf8)!
  
      self.webView.load(request)
  }
  </code></pre>
  
  <p>I was able to get the POST parameter on Web site loaded on iOS 11.2,
  but could not get it on iOS 11.3</p>
  
  <p>Why did not get it on iOS 11.3?　Was the specification changed?</p>
  
  <p>I want anyone to tell me the workaround. Please give me the answer.</p>