Migrating to NSURLSession from NSURLConnection incompatible pointer types

Question

I'm moving from NSURLConnection to NSURLSession and running into a problem with the NSMutableURLRequest that holds values for the URL request.

Any ideas on how to retain this info in the NSURLSession without getting this error:

incompatible pointer types sending nsmutableurlrequest to parameter of type nesting * _nonull nsurl urlwithstring

I see that this line [NSURL URLWithString:myRequest] wants a NSString, but how to I still pass the other info that is on my NSMutableURLRequest?

NSMutableURLRequest *myRequest = [NSMutableURLRequest requestWithURL: myURL];
[acquisitionRequest setValue:userAgent forHTTPHeaderField:@"User-Agent"];

NSURLSession *session = [NSURLSession sharedSession];
[[session dataTaskWithURL:[NSURL URLWithString:myRequest]
            completionHandler:^(NSData *data,
                                NSURLResponse *response,
                                NSError *error) {                
            }] resume];

Answer 1

You should use dataTaskWithRequest:completionHandler: instead of dataTaskWithURL:completionHandler:. This way you can pass the whole request in. If it complains about being mutable, you can copy it to get rid of the mutable state.

NSMutableURLRequest *myRequest = [NSMutableURLRequest requestWithURL: myURL]; 
[acquisitionRequest setValue:userAgent forHTTPHeaderField:@"User-Agent"];

NSURLSession *session = [NSURLSession sharedSession];

[[session dataTaskWithRequest:[myRequest copy]
            completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
                // completion stuff
}] resume];