How can I increase the height of UITableViewCell dynamiclly

Question

Hi,

I have an UITableView which includes a list of UITableViewCells. And I set the heights of UITableViewCells in method (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath.

However, I need to increase the height of UITableViewCell when it is selected. For example, the height of UITableViewCell needs to increase 100 pixels when the cell is selected, does anyone know how to do it?

Answer 1

1. Store selected index in your controller.

2. Return cell's height depending on that index:

   CGFloat height = 30.0f;
   ...
   -(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
       return indexPath.row == selectedIndex ? height+100 : height;
   }
   

3. Refresh tableview geometry in didSelectRowAtIndexPath method (empty block between beginUpdates and endUpdates does the trick):

   - (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
       index = indexPath.row;
       [tableView beginUpdates];
       [tableView endUpdates];      
   }
   

Answer 2

Make your delegate method

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath

return the (new) correct height and make the table view reload the given path.