title: iOS : Inserting multiple rows in UITableview with insertRowsAtIndexPaths
body: <p>I have already 10 rows in TableView What I am trying to do is adding another 10 rows for that I am using insertRowsAtIndexPaths but I am getting errors.</p>
  
  <p>Following is the code I am using </p>
  
  <pre><code>-(void)insertDownloadedActions:(NSMutableArray *)dataToAdd
  {
          __weak CurrentViewController *weakSelf = self;
  
          int64_t delayInSeconds = 2.0;
          dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
          dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
              [weakSelf.tableView beginUpdates];
              [weakSelf.dataSource addObjects:dataToAdd];
              NSIndexPath *newIndexPath = [NSIndexPath indexPathForRow:[weakSelf.dataSource count]-dataToAdd.count-1 inSection:0];
              [weakSelf.tableView insertRowsAtIndexPaths:@[newIndexPath] withRowAnimation:UITableViewRowAnimationTop];
              [weakSelf.tableView endUpdates];
          });
  }
  </code></pre>
  
  <p>But I am getting following error for that</p>
  
  <pre><code>Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid update: invalid number of rows in section 0.  The number of rows contained in an existing section after the update (20) must be equal to the number of rows contained in that section before the update (10), plus or minus the number of rows inserted or deleted from that section (1 inserted, 0 deleted) and plus or minus the number of rows moved into or out of that section (0 moved in, 0 moved out).
  </code></pre>