ios - 如何让 UIWebView session 永不过期

Question

我正在尝试按照 this 中的建议在 UIWebView 上保存 session 链接:

- (NSURLRequest*)addCookies:(NSArray *)cookies forRequest:(NSURLRequest *)request
{
    NSMutableURLRequest *mutableRequest = [request mutableCopy];
    if ([cookies count] > 0)
    {
        NSHTTPCookie *cookie;
        NSString *cookieHeader = nil;
        for (cookie in cookies)
        {
            if (!cookieHeader)
            {
                cookieHeader = [NSString stringWithFormat: @"%@=%@",[cookie name],[cookie value]];
            }
            else
            {
                cookieHeader = [NSString stringWithFormat: @"%@; %@=%@",cookieHeader,[cookie name],[cookie value]];
            }
        }
        if (cookieHeader)
        {
            [mutableRequest setValue:cookieHeader forHTTPHeaderField:@"Cookie"];
        }

        return [mutableRequest copy];
    }

    return nil;
}  

在 viewDidLoad 中:

NSURLRequest *webRequest = [NSURLRequest requestWithURL:homeURL];
NSArray *cookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies];

NSMutableURLRequest *requestMut = [NSMutableURLRequest requestWithURL:webRequest.URL];
[requestMut setHTTPShouldHandleCookies:YES];
webRequest = [self addCookies:cookies forRequest:requestMut];
[_tgWebView loadRequest:webRequest];  

但应用程序再次出现在登录屏幕上，即 session 未保存。 This是我刚刚发现的一个类似的未回答的问题。
更新:我尝试将 cookie 的到期日期设置为提前十年左右，但问题仍然没有解决:

+ (void)loadCookies
{
    NSArray *cookies = [NSKeyedUnarchiver unarchiveObjectWithData: [[NSUserDefaults standardUserDefaults] objectForKey: @"SAVED_COOKIES"]];
    NSHTTPCookieStorage *cookieStorage = [NSHTTPCookieStorage sharedHTTPCookieStorage];

    for (NSHTTPCookie *cookie in cookies)
    {
        NSMutableDictionary *newProperties = [[NSMutableDictionary alloc]initWithDictionary:cookie.properties];
        NSDate *date = [newProperties objectForKey:NSHTTPCookieExpires];
        if(date == nil)
            [newProperties setObject:[[NSDate date] dateByAddingTimeInterval:100*12*30*60*60] forKey:NSHTTPCookieExpires];
        else
            [newProperties setObject:[[NSDate date] dateByAddingTimeInterval:100*12*30*60*60] forKey:NSHTTPCookieExpires];
        NSHTTPCookie *newCookie = [NSHTTPCookie cookieWithProperties:newProperties];
        [cookieStorage setCookie: newCookie];
        NSLog(@"%@",newCookie);
    }
}

Answer 1

这只是一个可能的实现:首先存储cookie

- (void)saveCookies {
   NSData *cookiesData = [NSKeyedArchiver archivedDataWithRootObject: [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies]];
   NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
   [defaults setObject: cookiesData forKey: @"cookies"];
   [defaults synchronize];
}

恢复cookies:

- (void)loadCookies {
   NSArray *cookies = [NSKeyedUnarchiver unarchiveObjectWithData:[[NSUserDefaults standardUserDefaults] objectForKey: @"cookies"]];
   NSHTTPCookieStorage *cookieStorage = [NSHTTPCookieStorage sharedHTTPCookieStorage];
   for (NSHTTPCookie *cookie in cookies) {
    [cookieStorage setCookie: cookie];
   }
}