ios：UITableVIewCell扩展无法按预期工作

My TableView cell has a button. On click, I want to expand the cell. For expanding I'm changing the height of the cell on button click and reload the row. But when one row is expanded and then I try to expand another row, the behaviour is not as expected. The previously expanded row closes instead of clicked row. My TableView cell has a button. On click, I wan