title: How to set AutoLayout Constraints for this design
body: <p>I am trying to create a basic design as shown in the image below</p>
  
  <p><a href="https://i.stack.imgur.com/nxdWE.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/nxdWE.png" alt="enter image description here"></a></p>
  
  <p>This image is how I want my GUI. I have a background image and three buttons. How can I set the constarints for these buttons to be same on every screen size ? I am having problem because I do not want to fox the width of button I want them to be adjustable according to screen size.
  How can I do that please help.</p>