Helper methods for NSLayoutConstraint

NSLayoutConstraint+.swift

//
//  NSLayoutConstraint+.swift
//  SpringUI
//
//  Created by Jonny Kuang on 11/21/21.
//  Copyright © 2021 Jonny Kuang. All rights reserved. (MIT license)
//

import Foundation

extension NSLayoutConstraint {
    
    /// e.g. `UIView().heightAnchor.constraint(equalToConstant: 44).kjy_withPriority(.defaultHigh).isActive = true`
    func kjy_withPriority(_ priority: UILayoutPriority) -> NSLayoutConstraint {
        self.priority = priority
        return self
    }
}

/// e.g. `let notSoHighPriority = UILayoutPriority.defaultHigh - 1`
func + (priority: UILayoutPriority, difference: Float) -> UILayoutPriority {
    UILayoutPriority(priority.rawValue + difference)
}