swift - Update label in custom UITableView Cell -

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i need update label clicking on button in same cell. why code doesn't work ?

@ibaction func actionfaveunfave(sender: anyobject) {     let cell = self.tableview.cellforrowatindexpath(sender.indexpath)     println(cell?.labelfavedtimes)     cell.labelfavedtimes = "22"}

cell?.labelfavedtimes.text = "22"

btw self.tableview.cellforrowatindexpath(sender.indexpath) can return nil if cell not visible


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