title: can't set source of imagecropper.Forms
body: <p>I want to use the nuget ImageCropper.Forms of this link <a href="https://github.com/stormlion227/ImageCropper.Forms" rel="nofollow noreferrer">https://github.com/stormlion227/ImageCropper.Forms</a> . I already fulfilled the setup but can't run the example of the page, it is the next:</p>
  
  <p>to Show ImageCropper page.</p>
  
  <pre><code>new ImageCropper()
  {
      Success = (imageFile) =&gt;
      {
          Device.BeginInvokeOnMainThread(() =&gt;
          {
              imageView.Source = ImageSource.FromFile(imageFile);
          });
      }
  }.Show(this);
  </code></pre>
  
  <p>and tell me that imageViewis not declared, I thought I have to declare an image and use that for the imagesource but didn't work. Someone have an idea?</p>