Can you animate a height change on a UITableViewCell when selected?

Question

I\'m using a UITableView in my iPhone app, and I have a list of people that belong to a group. I would like it so that when the user clicks on a particular pers

Answer 1

Add a property to keep track of the selected cell

@property (nonatomic) int currentSelection;

Set it to a sentinel value in (for example) viewDidLoad, to make sure that the UITableView starts in the 'normal' position

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    //sentinel
    self.currentSelection = -1;
}

In heightForRowAtIndexPath you can set the height you want for the selected cell

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    int rowHeight;
    if ([indexPath row] == self.currentSelection) {
        rowHeight = self.newCellHeight;
    } else rowHeight = 57.0f;
    return rowHeight;
}

In didSelectRowAtIndexPath you save the current selection and save a dynamic height, if required

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
        // do things with your cell here

        // set selection
        self.currentSelection = indexPath.row;
        // save height for full text label
        self.newCellHeight = cell.titleLbl.frame.size.height + cell.descriptionLbl.frame.size.height + 10;

        // animate
        [tableView beginUpdates];
        [tableView endUpdates];
    }
}

In didDeselectRowAtIndexPath set the selection index back to the sentinel value and animate the cell back to normal form

- (void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath {       
        // do things with your cell here

        // sentinel
        self.currentSelection = -1;

        // animate
        [tableView beginUpdates];
        [tableView endUpdates];
    }
}