iOS 中UIWebView的cookie

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];
    }
}

参考文章：在UIWebView中设置cookie