Question

This code has the JSON but no matter what I do I haven’t been able to figure out how to pass this JSON to an instance variable. Each time I set it to a variable and call that variable outside of this method its nil. So what I can gather is that the variable is called before the following async call returns.

So the question is what can I do to the following code so that I can extract the JSON value. Somewhere on the internet I read that I would need to pass it a block which would server as a call back on completion but I cannot figure out how to do that for the following code

 //Gets the JSON object that contains the entries from the server
 -(void)getEntriesFromServer 
 {
   NSLog(@"%s", __PRETTY_FUNCTION__);

   [[appAPIClient sharedClient] getPath:@"/entries"
                          parameters:nil
                             success:^(AFHTTPRequestOperation *operation, id JSON)
    {
      NSLog(@" JSON array = %@",[JSON valueForKeyPath:@"entries"]);
    }failure:^(AFHTTPRequestOperation *operation, NSError *error)
    {
      NSLog(@" Json not received");
    }];
  }

Thanks

Answer 1

try to add __block to definition of an array e.g __block NSArray* entriesArray;
or make a property like

@property (nonatomic, retain) NSArray* entriesArray;

and change your code like this

[[appAPIClient sharedClient] getPath:@"/entries"
                               parameters:nil
                                  success:^(AFHTTPRequestOperation *operation, id JSON)
   {

     //NSLog(@" Json value received is : %@ ",[JSON description]);
     //NSLog(@" JSON array = %@",[JSON valueForKeyPath:@"entries"]);

     self.entriesArray = [NSArray arrayWithArray:[JSON valueForKeyPath:@"entries"]];
     NSLog(@" JSON array from inside block = %@", _entriesArray);
     }failure:^(AFHTTPRequestOperation *operation, NSError *error)
    {
        NSLog(@" Json not received");
    }];

Hope it’ll help