For me works
extension UIView {
func addBorders(edges: UIRectEdge = .all, color: UIColor = .black, width: CGFloat = 1.0) {
func createBorder() -> UIView {
let borderView = UIView(frame: CGRect.zero)
borderView.translatesAutoresizingMaskIntoConstraints = false
borderView.backgroundColor = color
return borderView
}
if (edges.contains(.all) || edges.contains(.top)) {
let topBorder = createBorder()
self.addSubview(topBorder)
NSLayoutConstraint.activate([
topBorder.topAnchor.constraint(equalTo: self.topAnchor),
topBorder.leadingAnchor.constraint(equalTo: self.leadingAnchor),
topBorder.trailingAnchor.constraint(equalTo: self.trailingAnchor),
topBorder.heightAnchor.constraint(equalToConstant: width)
])
}
if (edges.contains(.all) || edges.contains(.left)) {
let leftBorder = createBorder()
self.addSubview(leftBorder)
NSLayoutConstraint.activate([
leftBorder.topAnchor.constraint(equalTo: self.topAnchor),
leftBorder.bottomAnchor.constraint(equalTo: self.bottomAnchor),
leftBorder.leadingAnchor.constraint(equalTo: self.leadingAnchor),
leftBorder.widthAnchor.constraint(equalToConstant: width)
])
}
if (edges.contains(.all) || edges.contains(.right)) {
let rightBorder = createBorder()
self.addSubview(rightBorder)
NSLayoutConstraint.activate([
rightBorder.topAnchor.constraint(equalTo: self.topAnchor),
rightBorder.bottomAnchor.constraint(equalTo: self.bottomAnchor),
rightBorder.trailingAnchor.constraint(equalTo: self.trailingAnchor),
rightBorder.widthAnchor.constraint(equalToConstant: width)
])
}
if (edges.contains(.all) || edges.contains(.bottom)) {
let bottomBorder = createBorder()
self.addSubview(bottomBorder)
NSLayoutConstraint.activate([
bottomBorder.bottomAnchor.constraint(equalTo: self.bottomAnchor),
bottomBorder.leadingAnchor.constraint(equalTo: self.leadingAnchor),
bottomBorder.trailingAnchor.constraint(equalTo: self.trailingAnchor),
bottomBorder.heightAnchor.constraint(equalToConstant: width)
])
}
}
}