ios - Table View Cell size changing -

i have been having issue tableview in xcode using swift.

i using parse, (sad shutting down soon) think problem in interface builder. (ib) issue adds huge white space below each cell.

here's link picture: (i don't have enough reputation post images straight in question)

as can see in cell on ib, there no space reason adds huge space. have checked image resolution , size , exact size uiimageview

setup constraints in uitableviewcell. in viewdidload like:

self.tableview.estimatedrowheight = 120.0 //or other approximation of cell's height 

this cause table view's cells' height determined constraints set in cell.