title: Android WebViewClient's shouldInterceptRequest method: is there any equivalent of that in iOS?
body: <p>In Android, I can use WebViewClient's <a href="http://developer.android.com/reference/android/webkit/WebViewClient.html#shouldInterceptRequest(android.webkit.WebView,%20android.webkit.WebResourceRequest)" rel="nofollow noreferrer">shouldInterceptRequest</a> method to custom WebView's handling of certain URL. However, I cannot find anything equivalent in iOS's UIWebView and UIWebViewDelegate. Is there any way I can achieve the same purpose of shouldInterceptRequest in iOS, i.e., allow me to return data for a resource request?</p>
  
  <p>What I want to do is to make the web view support some private image formats(see the question: <a href="https://stackoverflow.com/questions/29534120/can-i-make-android-webview-support-other-image-formats-e-g-tiff">Can I make Android WebView support other image formats (e.g. TIFF)?</a>).</p>
  
  <p>Any suggestion is appreciated.</p>