Question

I am using the AFXMLRequestOperation method of the wonderful AFNetworking. What I would like to use is use the following, but wrap my own method around it, with my own completion callback.

NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://api.flickr.com/services/rest/?method=flickr.groups.browse&api_key=b6300e17ad3c506e706cb0072175d047&cat_id=34427469792%40N01&format=rest"]];
AFXMLRequestOperation *operation = [AFXMLRequestOperation XMLParserRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, NSXMLParser *XMLParser) {
  XMLParser.delegate = self;
  [XMLParser parse];
} failure:nil];
[operation start];

Is it possible to do something like the following?

+ (void)makeRequestWithURL:(NSURL *)url completion:(void (^)(BOOL finished))completion {

    NSURLRequest *request = [NSURLRequest requestWithURL:url]];
    AFXMLRequestOperation *operation = [AFXMLRequestOperation XMLParserRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, NSXMLParser *XMLParser) {
        XMLParser.delegate = self;
        [XMLParser parse];
    } failure:nil];
    [operation start];

    if (completion) {
        // How can I call my cometion block when AFXMLRequestOpersation is finished?
    }

}

Then call it using:

[MyClass makeRequestWithURL:url completion^(BOOL finished){
        if (finished) {
            NSLog(@"AFNetworking Finished");
        }
}];

Can can I know when AFNetworking has finished in MY completion block?

Answer 1

Just call your completion block in the success block:

+ (void)makeRequestWithURL:(NSURL *)url completion:(void (^)(BOOL finished))completion {

    NSURLRequest *request = [NSURLRequest requestWithURL:url]];
    AFXMLRequestOperation *operation = [AFXMLRequestOperation XMLParserRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, NSXMLParser *XMLParser) {
        XMLParser.delegate = self;
        [XMLParser parse];
        // call completion block here
        if (completion) {
          completion(YES);
        }

    } failure:nil];
    [operation start];
}

You should also implement the failure block of AFXMLRequestOperation.