title: '+[NSDictionary dictionaryWithObjectsAndKeys:]: second object of each pair must be non-nil. Or, did you forget to nil-terminate your parameter list?'
body: <p>am post mycode to json but my app error   </p>
  
  <blockquote>
    <p>" Terminating app due to uncaught exception
    'NSInvalidArgumentException', reason: '+[NSDictionary
    dictionaryWithObjectsAndKeys:]: second object of each pair must be
    non-nil.  Or, did you forget to nil-terminate your parameter list?'"</p>
  </blockquote>
  
  <pre><code>-(void)requesdatesendorder:(NSArray *)foodid{
  NSString *FoodId ;
  
  for (int i =0; i &lt; foodid.count; i++) {
      NSString *idfood = [foodid objectAtIndex:i];
      if (FoodId.length == 0) {
          FoodId = [NSString stringWithFormat:@"%@,food_id[%d]",idfood,i];
      }
      else{
          FoodId = [NSString stringWithFormat:@"%@,%@,food_id[%d]",FoodId,idfood,i];
      }
  }
  
  NSLog(@"%@",FoodId);
  
  NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys:
                          @"date_send_order",@"params",
                          FoodId
                          ,nil];
  [self requestWithMethod:@"POST"
                urlString:kFeedBeeservice
               parameters:params
                     mode:Beeservicedatesendorder];
  }
  </code></pre>
  
  <p>but i want send json format
  <a href="http://i.stack.imgur.com/tkfqv.png" rel="nofollow">http://i.stack.imgur.com/tkfqv.png</a></p>