cookie三种逆天写法

在APP开发中，cookie也开始变的越来越重要了。为了更好的切换，注销和登录账户，就必须熟悉cookie的用法。
花了点时间把代码整理了一下，注释也都标上了

1，获取cookie
获取cookie只能在请求中获取cookie，否则时获取不到的，url就不给出了，大家用自己的url测试一下就行。
获取到cookie后把cookie进行归档保存到userDefaults里

#pragma mark 获取并保存cookie到userDefaults
- ( void )getAndSaveCookie
{
    NSLog ( @"=============获取cookie==============" );
    NSString *urlString =  @"" ;

    //请求一个网址，即可分配到cookie
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.responseSerializer = [AFJSONResponseSerializer  new ];
    [manager GET:urlString parameters: nil success:^(AFHTTPRequestOperation *operation,  id responseObject) {

        //获取cookie
        NSArray *cookies = [[ NSHTTPCookieStorage sharedHTTPCookieStorage] cookies];
        for ( NSHTTPCookie *tempCookie in cookies) {
            //打印获得的cookie
            NSLog ( @"getCookie: %@" , tempCookie);
        }

        /*
         * 把cookie进行归档并转换为NSData类型
         * 注意：cookie不能直接转换为NSData类型，否则会引起崩溃。
         * 所以先进行归档处理，再转换为Data
         */
        NSData *cookiesData = [ NSKeyedArchiver archivedDataWithRootObject: [[ NSHTTPCookieStorage sharedHTTPCookieStorage] cookies]];

        //存储归档后的cookie
        NSUserDefaults *userDefaults = [ NSUserDefaults standardUserDefaults];
        [userDefaults setObject: cookiesData forKey:  @"cookie" ];
        NSLog ( @"\n" );

        [ self deleteCookie];

        [ self setCoookie];

    } failure:^(AFHTTPRequestOperation *operation,  NSError *error) {

        nil ;
    }];
}

2，删除cookie
把获取到的cookie删除掉，该步骤可以用在注销或者切换账号里。
当前，我这里删除cookie是为了检测后面的通过本地存储的数据进行设置cookie是否成功

#pragma mark 删除cookie
- ( void )deleteCookie
{
    NSLog ( @"============删除cookie===============" );
    NSHTTPCookieStorage *cookieStorage = [ NSHTTPCookieStorage sharedHTTPCookieStorage];
    NSArray *cookies = [[ NSHTTPCookieStorage sharedHTTPCookieStorage] cookies];

    //删除cookie
    for ( NSHTTPCookie *tempCookie in cookies) {
        [cookieStorage deleteCookie:tempCookie];
    }

    //把cookie打印出来，检测是否已经删除
    NSArray *cookiesAfterDelete = [[ NSHTTPCookieStorage sharedHTTPCookieStorage] cookies];
    for ( NSHTTPCookie *tempCookie in cookiesAfterDelete) {
        NSLog ( @"cookieAfterDelete: %@" , tempCookie);
    }
    NSLog ( @"\n" );
}

3，通过本地存储的数据设置cookie
把本地的cookie取出并反归档，设置到cookie中，并且检测cookie是否设置成功

#pragma mark 再取出保存的cookie重新设置cookie
- ( void )setCoookie
{
    NSLog ( @"============再取出保存的cookie重新设置cookie===============" );
    //取出保存的cookie
    NSUserDefaults *userDefaults = [ NSUserDefaults standardUserDefaults];

    //对取出的cookie进行反归档处理
    NSArray *cookies = [ NSKeyedUnarchiver unarchiveObjectWithData:[userDefaults objectForKey: @"cookie" ]];

    if (cookies) {
        NSLog ( @"有cookie" );
        //设置cookie
        NSHTTPCookieStorage *cookieStorage = [ NSHTTPCookieStorage sharedHTTPCookieStorage];
        for ( id cookie in cookies) {
            [cookieStorage setCookie:( NSHTTPCookie *)cookie];
        }
    } else {
        NSLog ( @"无cookie" );
    }

    //打印cookie，检测是否成功设置了cookie
    NSArray *cookiesA = [[ NSHTTPCookieStorage sharedHTTPCookieStorage] cookies];
    for ( NSHTTPCookie *cookie in cookiesA) {
        NSLog ( @"setCookie: %@" , cookie);
    }
    NSLog ( @"\n" );
}

看一下运行截图