Layout(anchor) views easily extending from UIView

UIView+Layout.swift

import UIKit

struct AnchoredConstraints {
    var top, leading, bottom, trailing, width, height: NSLayoutConstraint?
}

extension UIView {
    
    @discardableResult
    func anchor(top: NSLayoutYAxisAnchor?, leading: NSLayoutXAxisAnchor?, bottom: NSLayoutYAxisAnchor?, trailing: NSLayoutXAxisAnchor?, padding: UIEdgeInsets = .zero, size: CGSize = .zero) -> AnchoredConstraints {
        translatesAutoresizingMaskIntoConstraints = false
        var anchoredConstraints = AnchoredConstraints()
        
        if let top = top {
            anchoredConstraints.top = topAnchor.constraint(equalTo: top, constant: padding.top)
        }
        if let leading = leading {
            anchoredConstraints.leading = leadingAnchor.constraint(equalTo: leading, constant: padding.left)
        }
        if let bottom = bottom {
            anchoredConstraints.bottom = bottomAnchor.constraint(equalTo: bottom, constant: -padding.bottom)
        }
        if let trailing = trailing {
            anchoredConstraints.trailing = trailingAnchor.constraint(equalTo: trailing, constant: -padding.right)
        }
        if size.width != 0 {
            anchoredConstraints.width = widthAnchor.constraint(equalToConstant: size.width)
        }
        if size.height != 0 {
            anchoredConstraints.height = heightAnchor.constraint(equalToConstant: size.height)
        }
        
        [anchoredConstraints.top, anchoredConstraints.leading, anchoredConstraints.bottom, anchoredConstraints.trailing, anchoredConstraints.width, anchoredConstraints.height].forEach{ $0?.isActive = true }
        
        return anchoredConstraints
    }
    
    func anchor(size: CGSize) {
        if size.width != 0 {
            widthAnchor.constraint(equalToConstant: size.width).isActive = true
        }
        if size.height != 0 {
            heightAnchor.constraint(equalToConstant: size.height).isActive = true
        }
    }
    
    func anchorFillToSuperViewSafeArea(padding: UIEdgeInsets = .zero) {
        if #available(iOS 11.0, *) {
            anchor(top: superview?.safeAreaLayoutGuide.topAnchor, leading: superview?.safeAreaLayoutGuide.leadingAnchor, bottom: superview?.safeAreaLayoutGuide.bottomAnchor, trailing: superview?.safeAreaLayoutGuide.trailingAnchor, padding: padding)
        } else {
            anchor(top: superview?.topAnchor, leading: superview?.leadingAnchor, bottom: superview?.bottomAnchor, trailing: superview?.trailingAnchor, padding: padding)
        }
    }
    
    func anchorFillToSuperView(padding: UIEdgeInsets = .zero) {
        anchor(top: superview?.topAnchor, leading: superview?.leadingAnchor, bottom: superview?.bottomAnchor, trailing: superview?.trailingAnchor, padding: padding)
    }
    
    // Need to clean
    func fillSuperview() {
        anchor(top: superview?.topAnchor, leading: superview?.leadingAnchor, bottom: superview?.bottomAnchor, trailing: superview?.trailingAnchor)
    }
    
    func anchorSize(to view: UIView) {
        widthAnchor.constraint(equalTo: view.widthAnchor).isActive = true
        heightAnchor.constraint(equalTo: view.heightAnchor).isActive = true
    }
    
}