title: UIVisualEffectView as input view for textfield in Xcode
body: <p>I want to program a custom view as the input view for a textfield. This custom keyboard is a UIVisualEffectView with a blur effect, but when the keyboard shows up, the background isn't transparent, it's opaque.</p>
  
  <p>When I add the keyboard as a subview and not as a input view, the effect works.</p>
  
  <p>How can I assign the input view with a transparent effect?</p>
  
  <pre><code>textfield.inputview = visualeffectview;
  </code></pre>
  
  <p>Thank You</p>