//
//  File.swift
//  
//
//  Created by Johnhao on 2022/1/18.
//

import UIKit

extension NSLayoutConstraint {
    enum Key {
    internal static var originalConstraint = "originalConstraint"
    }
    
    /// 原来的约束值
    var jh_originalConstraint: CGFloat {
        set {
            objc_setAssociatedObject(self, &Key.originalConstraint, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
        }
        get {
            objc_getAssociatedObject(self, &Key.originalConstraint) as? CGFloat ?? 0
        }
    }
    
    
}