Question

I’ve made a subclass of UITableViewCell and added a MapView. Everytime I scroll the map of the screen and scroll back to that cell it loads again. (As you all know it’s the default behaviour for cell reusing)

Is there anyway to prevent that? Or do you know any other tricks for that case? thanks a lot!

Answer 1

One possible solution:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
  static NSString *CellIdentifier = @"Cell";
  NSInteger row = [indexPath row];
  UITableViewCell *cell = nil;
  if( row != kMapCellRow ) { // defined value to whatever value it may be
    cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
  }
  else {
    // use an ivar to track the map cell, should be set to nil in class init
    cell = _mapCell;
  }
  if (cell == nil) {
    if( row != kMapCellRow ) { // defined value to whatever value it may be
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
    }
    else {
        // create your map cell here
        cell = [[[MyTableViewMapCell alloc] init...
    }
  }
  // configure it here

You could replace the defined kMapCellRow with an instance variable if it makes sense for your app.