如何在表格视图中切换按钮

I have a custom cell in my table view which contain a button and name of audio file. when i am tapping in button the relevant audio is playing and when tapping again it audio stops. My problem is when i am tapping the same button it is ok but when i am tapping in any button different then current cell then my process is not working. Can any one show me the right direction to do this . My code is below . Thanks in advance..I have a custom cell in my table view which con