iOS) How to set parameter when getting response using AFHTTPRequestOperation with 'GET' method

My code is below:

NSString *urlString = [[NSString stringWithFormat:@"/players?skip=%ld",(long)skipSize] DVURL];
NSURL *url = [NSURL URLWithString:urlString];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
//[request set]
[request setValuesForKeysWithDictionary:[filter filteringDictionary]];
AFHTTPRequestOperation *operation =
[[AFHTTPRequestOperation alloc] initWithRequest:request];
operation.responseSerializer = [AFJSONResponseSerializer serializer];
[operation setCompletionBlockWithSuccess:
 ^(AFHTTPRequestOperation *operation, id responseObject) {
     NSLog(@"responseObject %@", responseObject);

     totalPages = ([[responseObject
                     objectForKey:@"count"] intValue] / 20);
     NSLog(@"%@",[responseObject objectForKey:@"players"]);
     for (NSDictionary *playerDict in [responseObject objectForKey:@"players"]) {
         DVPlayer *player = [[DVPlayer alloc] initWithDictionary:playerDict];
         if (![self.playerArray.players containsObject:player]) {
             [self.playerArray.players addObject:player];
         }
     }
     [playerCollectionView reloadData];

 } failure:
 ^(AFHTTPRequestOperation *operation, NSError *error) {
     NSLog(@"Error: %@", [error localizedDescription]);
     [[[UIAlertView alloc]
        initWithTitle:@"Error fetching players!"
        message:@"Please try again later"
        delegate:nil
        cancelButtonTitle:@"OK"
        otherButtonTitles:nil] show];
 }];

[operation start];

When I use AFHTTPRequestOperationManager, I used NSDictionary as parameter for GET method.

So I thought [request setValuesForKeysWithDictionary:[filter filteringDictionary]]; would be corresponding.

But I got an error :

setValue:forUndefinedKey:]: this class is not key value coding-compliant for name(ex)

I architected the parameter is NSDictionary for convenience... Can't I set parameter as NSDictionary when using AFHTTPRequestOperation , not AFHTTPRequestOperationManager?

Help me please

AFHTTPRequestOperation takes an NSURLRequest as an init parameter. As such, you need to handle the serialization yourself, append it to your url, and then encode the url:

NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:[yourUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]];

Just one more reason why AFHTTPRequestOperationManager is easier ;)