如何在加载后设置UIWebView的cookies？

// 创建cookie对象
let cookieProperties = [
    HTTPCookiePropertyKey.name: "cookieName",
    HTTPCookiePropertyKey.value: "cookieValue",
    HTTPCookiePropertyKey.domain: "example.com",
    HTTPCookiePropertyKey.path: "/",
    HTTPCookiePropertyKey.expires: NSDate(timeIntervalSinceNow: 3600)
]
let cookie = HTTPCookie(properties: cookieProperties)

// 获取cookie存储对象
let cookieStorage = HTTPCookieStorage.shared

// 添加cookie到cookie存储中
cookieStorage.setCookie(cookie!)

// 设置UIWebView的请求头
let url = URL(string: "https://example.com")
let request = NSMutableURLRequest(url: url!)
request.setValue(cookieStorage.cookies?.first?.value, forHTTPHeaderField: "Cookie")

// 加载UIWebView
webView.loadRequest(request as URLRequest)