在请求的时候加

//支持cookie

[urlRequest setHTTPShouldHandleCookies:YES];

表示该请求支持cookie

在响应中取得cookie，并保存

- (void)connection:(NSURLConnection *)connection // IN

    didReceiveData:(NSData *)data                // IN

{

    NSString *reply = [[NSString alloc] initWithData:data

                                             encoding:NSUTF8StringEncoding];

    NSNumber *statusInfo =[[reply JSONValue] valueForKey:@"status"] ;

    NSLog(@"reply=====%@",reply);

    [reply release];

    if ([statusInfo intValue]==1) {

        //保存cookie

        NSHTTPURLResponse *httpResponse=(NSHTTPURLResponse *)self.responseCopy;

        NSDictionary *fields = [httpResponse allHeaderFields ];

        NSLog(@"response头内容＝＝＝%@",[fields description]);

        //取得cookie

        if (self.cookie == nil) {

            NSString *tempCookie =[[NSString alloc] initWithString: [fields valueForKey:@"Set-Cookie"]];  

            self.cookie=tempCookie;

            [tempCookie release];

            tempCookie=nil;

        }

        else{

            self.cookie = [fields valueForKey:@"Set-Cookie"];

        }

        

        NSLog(@"cookie = %@",self.cookie);

        //接受cookie

        [[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookieAcceptPolicy:NSHTTPCookieAcceptPolicyAlways]; 

        NSLog(@"写入后:%@",[[NSHTTPCookieStorage sharedHTTPCookieStorage]cookies]);

}

至此cookie已经成功保存到[[NSHTTPCookieStorage sharedHTTPCookieStorage]cookies]中

 

注意cookie是有一个实效时间的，如果那个时间没有设定的话，默认的是浏览器打开期间

下边是如何在请求中加入cookie

// 从 URL 中载入一个 html 页面

    for (NSHTTPCookie *tempcookie in [[NSHTTPCookieStorage sharedHTTPCookieStorage]cookies]) {

        NSLog(@"numberOfCookies_get :Namehome: %@ : Value: %@", tempcookie.name, tempcookie.value);

        self.cookie=[[[[[tempcookie.name stringByAppendingString:@"="]stringByAppendingString:tempcookie.value] stringByAppendingString:@"; "] stringByAppendingString:@"path="]stringByAppendingString:tempcookie.path];

    }

    

    NSLog(@"webView.cookie=====in webview====%@",self.cookie);

    NSURL *url = [NSURL URLWithString:@"http://aa/bb/"];//这里是需要cookie的网址

    NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url]; 

    [urlRequest addValue:self.cookie forHTTPHeaderField:@"Set-Cookie"]; 

    [self.WebView loadRequest:urlRequest];

这样从开始获得cookie，到应用cookie，整个过程就完整了。