gistfile1.txt

extension UIView {
    func embedView(_ view: UIView, inset: UIEdgeInsets = UIEdgeInsets.zero) {
        let topConstraint = NSLayoutConstraint(
            item: self,
            attribute: .top,
            relatedBy: .equal,
            toItem: view,
            attribute: .top,
            multiplier: 1,
            constant: inset.top
        )
        let leadingConstraint = NSLayoutConstraint(
            item: self,
            attribute: .leading,
            relatedBy: .equal,
            toItem: view,
            attribute: .leading,
            multiplier: 1,
            constant: inset.left
        )
        let trailingConstraint = NSLayoutConstraint(
            item: self,
            attribute: .trailing,
            relatedBy: .equal,
            toItem: view,
            attribute: .trailing,
            multiplier: 1,
            constant: inset.right
        )
        let bottomConstraint = NSLayoutConstraint(
            item: self,
            attribute: .bottom,
            relatedBy: .equal,
            toItem: view,
            attribute: .bottom,
            multiplier: 1,
            constant: inset.bottom
        )
        
        view.translatesAutoresizingMaskIntoConstraints = false
        addSubview(view)
        addConstraints([leadingConstraint, trailingConstraint, topConstraint, bottomConstraint])
    }
}