Objectivec NSHTTPCookieStorage 状态未在应用退出时保存.那里有任何明确的知识文档吗

正在努力解决这个问题，不愿实施定制的cookie管理系统.

似乎iOS实现HTTP的某些隐藏级别无法正确管理无会话cookie.每当HTTP响应设置或删除cookie时，立即判断NSHTTPCookie存储cookie将产生预期结果，并指示正确的sessionOnly值.

但是，如果应用程序在响应更新cookies后不久退出，则在重新启动这些sessionOnly=FALSE cookies时，cookies将恢复到以前的状态，并且最近的更新将丢失.

Cookie是由响应头还是NSHTTPCookie存储setCookie:设置/删除没有区别.

一些缓存/同步巫毒必须在幕后进行.cookie持久化所需的时间最多可达5秒.

有没有人对这种行为有明确的解释？这是一个简单明了的错误吗？或者一些我无法理解的未记录功能？

一些代码可以用来复制:

- (void)applicationDidBecomeActive:(UIApplication *)application
{

    [[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookieAcceptPolicy:NSHTTPCookieAcceptPolicyAlways];

    NSHTTPCookie *cookie;
    for (cookie in [NSHTTPCookieStorage sharedHTTPCookieStorage].cookies) {
        NSLog(@"%@=%@", cookie.name, cookie.value);
    }

    NSMutableDictionary *cookieProperties = [NSMutableDictionary dictionary];
    [cookieProperties setObject:@"testCookie" forKey:NSHTTPCookieName];
    [cookieProperties setObject:[NSString stringWithFormat:@"%f", [[NSDate date] timeIntervalSince1970]] forKey:NSHTTPCookieValue];
    [cookieProperties setObject:@"www.example.com" forKey:NSHTTPCookieDomain];
    [cookieProperties setObject:@"www.example.com" forKey:NSHTTPCookieOriginURL];
    [cookieProperties setObject:@"/" forKey:NSHTTPCookiePath];
    [cookieProperties setObject:@"0" forKey:NSHTTPCookieVersion];

    // set expiration to one month from now
    [cookieProperties setObject:[[NSDate date] dateByAddingTimeInterval:2629743] forKey:NSHTTPCookieExpires];

    cookie = [NSHTTPCookie cookieWithProperties:cookieProperties];
    [[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookie];

}

这段代码应该在每次启动时输出一个新值.相反，你会发现，如果你快速退出应用程序，该值将保持不变.

一些可能相关的堆栈溢出问题:

iphone NSHTTPCookieStorage avaible on app reopen?

iPhone: NSHTTPCookie is not saved across app restarts

NSHTTPCookies refuse to be deleted

deleted NSHTTPCookie returns if app is terminated