ios - How to know UITableViewCell high? -

i have uitabelviewcontroller custom myuitableviewcell. myuitableviewcell class has @iboutlet mytextview:uitextview , method:

func getheight() -> cgfloat     {         let height = (self.mytextview?.contentsize)!.height         return height     } 

i need set high cell depend textview content size. in uitabelviewcontroller set high tableviewcell:

   override func tableview(_tableview: uitableview, estimatedheightforrowatindexpath indexpath: nsindexpath) -> cgfloat     {         let cell = tableview(_tableview, cellforrowatindexpath: indexpath)         println(cell.getheight())         return cell.getheight()     } 

but println show 20.0 cells on output, although see real cell high in table different.

simply check uitableview's rowheight method, this:

tableview.rowheight