How can I horizontally center a UIView?

Question

How can I make UIView horizontally centered and 30px from the top of the view controller using CGRectMake?

var draggableView: DraggableView = DraggableView(frame:CGRectMake(0 , 30, 260, 260))
draggableView.center = center

Answer 1

Try:

let size = 260
let screenWidth = self.view.frame.size.width

let frame = CGRectMake((screenWidth / 2) - (size / 2), 30, size, size)
let draggableView = DraggableView(frame: frame)

self.view.addSubview(draggableView)