AFHTTPRequestOperationManager how to get response from server

Question

How to get JSON response? If PHP print some JSON whole request failed, if PHP does not print anything then response succeed. How to work with AFHTTPRequestOperation ?

 AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
        NSDictionary *parameters = @{@"foo":@"barr"};
        UIImage *image = myImage.image;
        [manager POST:@"http://local/index.php"
           parameters:parameters
    constructingBodyWithBlock:^(id<AFMultipartFormData> formData){
        [formData appendPartWithFileData:UIImageJPEGRepresentation(image, 0.7)
                                    name:@"file"
                                fileName:@"photo.jpg"
                                mimeType:@"image/jpeg"];
    }
              success:^(AFHTTPRequestOperation *operation, id responseObject){
                  NSLog(@"Success: %@", responseObject);
              }
              failure:^(AFHTTPRequestOperation *operation, NSError *error){
                  NSLog(@"Error %@", operation.responseString);
              }];

Answer 1

in the success block try:

NSError *e;
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:[operation.responseString dataUsingEncoding:NSUTF8StringEncoding] options:NSJSONReadingMutableContainers error:&e];