iPhone UIView - Resize Frame to Fit Subviews

Question

Shouldn\'t there be a way to resize the frame of a UIView after you\'ve added subviews so that the frame is the size needed to enclose all the subviews? If your subviews are

Answer 1

Although quite a few answers already, none worked for my use case. In case you use autoresizingMasks and want to resize view and move subviews so the size of rectangle matches subviews.

public extension UIView {

    func resizeToFitSubviews() {
        var x = width
        var y = height
        var rect = CGRect.zero
        subviews.forEach { subview in
            rect = rect.union(subview.frame)
            x = subview.frame.x < x ? subview.frame.x : x
            y = subview.frame.y < y ? subview.frame.y : y
        }
        var masks = [UIView.AutoresizingMask]()
        subviews.forEach { (subview: UIView) in
            masks.add(subview.autoresizingMask)
            subview.autoresizingMask = []
            subview.frame = subview.frame.offsetBy(dx: -x, dy: -y)
        }
        rect.size.width -= x
        rect.size.height -= y
        frame.size = rect.size
        subviews.enumerated().forEach { index, subview in
            subview.autoresizingMask = masks[index]
        }
    }
}