有关cookie是什么，大家可以自行百度，本文我获得cookie的目的是得到一个userID。

下面的是代码。

- (void)getUserIDFromCookie{    NSHTTPCookieStorage *sharedHTTPCookieStorage = [NSHTTPCookieStorage sharedHTTPCookieStorage];    NSArray *cookies = [sharedHTTPCookieStorage cookiesForURL:urlStr];        NSEnumerator *enumerator = [cookies objectEnumerator];    NSHTTPCookie *cookie;    while (cookie = [enumerator nextObject]) {        NSLog(@"%@,%@", [cookie name], [cookie value]);    }}

 由此得到的cookie，大家可以根据cookie里面的内容进行遍历，来得到自己想要的值。

对于ios 来说 NSHTTPCookieStorage 会存储APP自身访问所有url的cookie，可以用domain为标志来获取自己所需要的cookie。需要注意的是，NSHTTPCookieStorage存储的cookie在过期后会自动删除，如用户手动调整时间超过期时间则系统也会自动删除，因此某些业务逻辑需要注意。

 

设置cookie：

- (void)setCookie{    NSMutableDictionary *cookieProperties = [NSMutableDictionary dictionary];//    设置 cookie 的参数    [cookieProperties setObject:@"cookie_user" forKey:NSHTTPCookieName];    [cookieProperties setObject:uid forKey:NSHTTPCookieValue];    [cookieProperties setObject:@"xxx.xxx.com" forKey:NSHTTPCookieDomain];    [cookieProperties setObject:@"/" forKey:NSHTTPCookiePath];    [cookieProperties setObject:@"0" forKey:NSHTTPCookieVersion];    [cookieProperties setObject:[[NSDate date] dateByAddingTimeInterval:2629743] forKey:NSHTTPCookieExpires];        NSHTTPCookie *cookieuser = [NSHTTPCookie cookieProperties];    [[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookieuser];}

 

接下来说下清除所有cookie:

NSHTTPCookie *cookie;NSHTTPCookieStorage *sharedHTTPCookieStorage = [NSHTTPCookieStorage sharedHTTPCookieStorage]; for (cookie in [storage cookies]) { 　 　　[sharedHTTPCookieStorage deleteCookie:cookie]; } // 缓存 清除 [[NSURLCache sharedURLCache] removeAllCachedResponses];

 清除某个url下的cookie：

- (void)deleteCookie{    NSHTTPCookie *cookie;        NSHTTPCookieStorage *sharedHTTPCookieStorage = [NSHTTPCookieStorage sharedHTTPCookieStorage];        NSArray *cookieAry = [sharedHTTPCookieStorage cookiesForURL: [NSURL URLWithString:urlStr]];    for (cookie in cookieAry){        [sharedHTTPCookieStorage deleteCookie:cookie];    }}

 

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