iOS在Indexpath上的TableCell上添加标签

I'm trying to present a label every time the user double taps on my cell. I can detect the taps and I can execute code from them but I'm having an issue with the labels. For some reason the labels are being added two sometimes three cells below the one it should be added on. I need the label to be added on the cell that was tapped, shouldn't be to hard to do. I'm trying to present a label every time the us