title: remove cache in wkwebview objective c
body: <p>I need to remove cache in wkwebview.I am using below code but no success.</p>
  
  <pre><code> [[NSURLCache sharedURLCache]removeCachedResponseForRequest:request];
      [[NSURLCache sharedURLCache] removeAllCachedResponses];
      [[NSURLCache sharedURLCache] setDiskCapacity:0];
      [[NSURLCache sharedURLCache] setMemoryCapacity:0];
  </code></pre>