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

Old question but you could also do this with a recursive function.

You might want a solution that always works no matter how many subviews and subsubviews,...

Update : Previous piece of code only had a getter function, now also a setter.

extension UIView {

    func setCGRectUnionWithSubviews() {
        frame = getCGRectUnionWithNestedSubviews(subviews: subviews, frame: frame)
        fixPositionOfSubviews(subviews, frame: frame)
    }

    func getCGRectUnionWithSubviews() -> CGRect {
        return getCGRectUnionWithNestedSubviews(subviews: subviews, frame: frame)
    }

    private func getCGRectUnionWithNestedSubviews(subviews subviews_I: [UIView], frame frame_I: CGRect) -> CGRect {

        var rectUnion : CGRect = frame_I
        for subview in subviews_I {
            rectUnion = CGRectUnion(rectUnion, getCGRectUnionWithNestedSubviews(subviews: subview.subviews, frame: subview.frame))
        }
        return rectUnion
    }

    private func fixPositionOfSubviews(subviews: [UIView], frame frame_I: CGRect) {

        let frameFix : CGPoint = frame_I.origin
        for subview in subviews {
            subview.frame = CGRectOffset(subview.frame, -frameFix.x, -frameFix.y)
        }
    }
}