title: How to make iOS ImageView full match window?
body: <p><a href="https://i.stack.imgur.com/D7dY8.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/D7dY8.jpg" alt="enter image description here"></a></p>
  
  <p>I am new in iOS , I am an android developer self-learing iOS just for fun.
  As you can see from the picture , I want to make my ImageView full-displayed in the window in different inch iPhone.
  If you are an android developer, you may know what I mean is how to make ImageView match_parent in both width and height?</p>