title: How to clear AlamofireImage setImageWithURL cache
body: <p>I am using AlamofireImage in my project quite a lot and I use</p>
  
  <pre><code>let URL = NSURL(string: "https://cdn.domain.com/profile/image.jpg")!
  imageView.af_setImageWithURL(URL)
  </code></pre>
  
  <p>to fetch an image from my CDN. I have done some tests but correct me if I am wrong, this seems to store the downloaded image in to a cache. My tests included downloading a 5mb image. The first time it took about 20 seconds, the second time was instant.</p>
  
  <p>The thing I would like to know is how can I clear the cache for a specific URL/image and re-download the image?</p>
  
  <p>Say for example I update a users profile pic. The image name/URL will be exactly the same but I know the image has changes as the user selected a new image from their library or camera. I know the image has been uploaded successfully to the CDN as I can see the new image in the folder directly on the CDN.</p>