Remove Boarders From Xcode 'Iframe' 'web view' : I am looking to remove the white boarders from around the edge of the image attached when viewing my app on the Iphone X Emulator. Whats the best way to do this? Even to make them black will be a help. 

Many thanks, 
[Image 1][1]


  [1]: https://i.stack.imgur.com/T510h.jpg