Interpreting NSURLConnection responses: NSError

Question

I am setting up a NSURLConnection which send an asynchrounous request and deals with it using a completionHandler.

__block int errorType = 0; //server error code: 200, 300 etc..
__block BOOL hasError = FALSE;
__block NSDictionary *json;

[NSURLConnection sendAsynchronousRequest:request
                                       queue:[NSOperationQueue mainQueue] 
                           completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError)   {

                           // HERE I WOULD LIKE TO INTERPRET connectionError
                           // AND SET IF IT HASERROR OR NOT as well as the error type

                           json = [NSJSONSerialization JSONObjectWithData:data
                                                                  options:0
                                                                    error:nil];



                       }];

Based on the error type I would need to do different things. The only issue is that I do not know how to interpret the error in this context.

I need to extract information like: "the request was not sent", "the request was sent".

Any suggestion / reference?

Answer 1

Use

connectionError.localizedDescription

There is useful article about NSError

In case if there is no error connectionError object will be nil.