所有的cookie都会在这里面

NSHTTPCookieStorage *sharedHTTPCookieStorage = [NSHTTPCookieStorage sharedHTTPCookieStorage];
    NSArray *cookies = [sharedHTTPCookieStorage cookiesForURL:[NSURL URLWithString:theURL]];
    NSEnumerator *enumerator = [cookies objectEnumerator];
    NSHTTPCookie *cookie;
    while (cookie = [enumerator nextObject]) {
        NSLog(@"COOKIE{name: %@, value: %@}", [cookie name], [cookie value]);
    }

官方文档

参考文档