Keep uitableview static when inserting rows at the top

Question

I have a tableView that I\'m inserting rows into at the top.

Whilst I\'m doing this I want the current view to stay completely still, so the rows only appear if you

Answer 1

-(void) updateTableWithNewRowCount : (int) rowCount
{    
    //Save the tableview content offset 
    CGPoint tableViewOffset = [self.tableView contentOffset];                                                                                                            

    //Turn of animations for the update block 
    //to get the effect of adding rows on top of TableView
    [UIView setAnimationsEnabled:NO];

    [self.tableView beginUpdates];                    

    NSMutableArray *rowsInsertIndexPath = [[NSMutableArray alloc] init];        

    int heightForNewRows = 0;

    for (NSInteger i = 0; i < rowCount; i++) {

        NSIndexPath *tempIndexPath = [NSIndexPath indexPathForRow:i inSection:SECTION_TO_INSERT];
        [rowsInsertIndexPath addObject:tempIndexPath];

        heightForNewRows = heightForNewRows + [self heightForCellAtIndexPath:tempIndexPath];                        
    }

    [self.tableView insertRowsAtIndexPaths:rowsInsertIndexPath withRowAnimation:UITableViewRowAnimationNone];                                                                            

    tableViewOffset.y += heightForNewRows;                                                                                 

    [self.tableView endUpdates]; 

    [UIView setAnimationsEnabled:YES];

    [self.tableView setContentOffset:tableViewOffset animated:NO];           
}


-(int) heightForCellAtIndexPath: (NSIndexPath *) indexPath
{

    UITableViewCell *cell =  [self.tableView cellForRowAtIndexPath:indexPath];

    int cellHeight   =  cell.frame.size.height;

    return cellHeight;
}

Simply pass in the row count of the new rows to insert at the top.