Setting associated userObject to UIView

gistfile1.txt

//
//  UIView+SF.swift
//  WechatTail
//
//  Created by CHENWANFEI on 2019/9/22.
//  Copyright © 2019 SwordFish. All rights reserved.
//

import UIKit


var g_UIView_AssociatedObjectHandle: UInt8 = 0

extension UIView{

   
    var userObject:Any? {
        get {
            return objc_getAssociatedObject(self, &g_UIView_AssociatedObjectHandle)
        }
        set {
            objc_setAssociatedObject(self, &g_UIView_AssociatedObjectHandle, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
            
        }
    }

}