ios - Animate UIImageView from a subview to parent view -

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i'm working on project allowing users play chess. have parent view represents board, each square added board subview. chess piece uiimageview , added square subview.

occupyingpieceimageview = uiimageview(frame: cgrectmake(0, 0, size, size))     self.addsubview(occupyingpieceimageview)

to animate chess move want change position of piece 1 square other, understand means changing uiimageview's frame don't know how, frame within it's parent view (square). doesn't work:

func move(destsquare: square){     var imgview = self.occupyingpieceimageview     var thispiece = self.piece     uiview.animatewithduration(3, animations: {         self.clearpiece()         imgview.frame = destsquare.frame     })     destsquare.setpiece(thispiece) }

consider adding pieces board rather squares. architecture allow animate movement, including placing piece on line between 2 squares.


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