NSLayoutConstraint+Priority.swift

example.swift

let superView = UIView()
let view = UIView()

//: Example:
let constraints = [

    view.leadingAnchor.constraint(greaterThanOrEqualTo: superView.leadingAnchor, constant: 12),
    superView.trailingAnchor.constraint(greaterThanOrEqualTo: view.trailingAnchor, constant: 12),

    view.topAnchor.constraint(greaterThanOrEqualTo: superView.topAnchor, constant: 12),
    superView.bottomAnchor.constraint(greaterThanOrEqualTo: view.bottomAnchor, constant: 12),

    view.centerXAnchor.constraint(equalTo: superView.centerXAnchor).withPriority(.high),
    view.centerXAnchor.constraint(equalTo: superView.centerXAnchor).withPriority(.high),
]

NSLayoutConstraint+Priority.swift

extension NSLayoutConstraint {
    func withPriority(_ p: UILayoutPriority) -> Self {
        self.priority = p
        return self
    }
}