Question

I have only one cell with a button in a tableview. The cell height is defined in

tableView:tableView:heightForRowAtIndexPath:

The cell height is 40;

When I click the button, how do I change the cell height to 80?
thanks for any help.

Answer 1

Define a property and @synthesize it:

@property (retain, nonatomic) NSIndexPath* selectedRowIndex;

Override didSelectRowAtIndexPath and heightForRowAtIndexPath methods:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

    if(selectedRowIndex && indexPath.row == selectedRowIndex.row) {

        //[_yourTableView deselectRowAtIndexPath:indexPath animated:YES]; If you only want the cell to get bigger
        selectedRowIndex = nil;

    }

    else {  self.selectedRowIndex = [indexPath retain];   }

    [tableView beginUpdates];
    [tableView endUpdates];
}

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

if (tableView == _yourTableView) {


    if(selectedRowIndex && indexPath.row == selectedRowIndex.row){

        return 80;
    }

    // Cell isn't selected so return single height
    return 40;

}

else return 0;
}

Because of the beginUpdates and endUpdates lines this should animate the cell height.