Custom NSURLProtocol not used in second webview

Question

I've subclassed NSURLProtocoland registered it in didFinishLaunchingWithOptions with this code:

+ (void) registerProtocol 
{
   static BOOL registered = NO;

   if (!registered) 
   {
      [NSURLProtocol registerClass:[MyURLProtocol class]];
      registered = YES;
   }
}

For the first UIWebView in my app (in the mainwindow) the method canInitWithRequest is triggered, and I can execute my custom code.

However I have a second UIWebView, that is inside an UIViewController which is pushed at some point in the app (presented modally). The canInitWithRequest will NOT be called for the second UIWebView, thus I cannot execute my custom code. This is even true when the protocol is registered after both instances of UIWebView are created.

Anyone knows why?

[edit] d'oh! i just found it was just a plain error in the javascript that is loaded in the second webview :( works like a charm in both webviews now!

Answer 1

Not sure if this is related to your situation and solution, but posting for the record. Discovered today after much trial and tribulation that an ajax call sending a message to objective c which is to be intercepted by a subclass of NSURLProtocol should have cache set to false if you expect to be sending the same url more than once. Like so:

$.ajax({
       url:"atavistcommand://" + name,
       data:JSON.stringify(data),
       type:"GET",
       processData:false,
       cache:false )};

If cache = true then objective c will never receive subsequent requests on the same url.