title: Cocoapods: what is the best way to modify the resources
body: <p>I'm using cocoapods to manage third party libraries for my iOS project. The resources (e.g. images) are located in the Pods project. Now if I want to replace some of those resources, for example <code>bg-addbutton.png</code> in the snapshot, what would be the best way to do? I'm thinking of replacing the resources directly in the Pods project, but the new resources will be overwritten if I upgrade the libraries later on.</p>
  
  <p><img src="https://i.stack.imgur.com/jPuO3.jpg" alt="enter image description here"></p>