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我正在我的 iPhone 应用程序中创建一个登录页面,并使用 Json 调用 PHP 页面以连接到 MySql 数据库。

我与 PHP 页面有联系,但我的程序没有发布任何内容。

- (IBAction)login:(id)sender{


        //Alloc dictionary
        jsonDictionaryLogin = [[NSDictionary alloc] initWithObjectsAndKeys: securityCode, @"hash_app", loginTextField.text, @"app_email", passwordTextField.text, @"app_password", nil];

        NSError *jsonError = nil;
        jsonDataLogin = [NSJSONSerialization dataWithJSONObject:jsonDictionaryLogin
                                                        options:kNilOptions error:&jsonError];

        if(!jsonError) {

            NSString *serJSON = [[NSString alloc] initWithData:jsonDataLogin encoding:NSUTF8StringEncoding];
            NSLog(@"\n\nSerialized JSON: %@", serJSON);

        } else {

            NSLog(@"JSON Encoding Failed: %@", [jsonError localizedDescription]);
        }


        NSURL *url = [NSURL URLWithString:@"http://www.mywebsite.com/mypage.php"];

        NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:30.0];



        [request setHTTPMethod:@"POST"];
        [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
        [request addValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
        [request addValue:[NSString stringWithFormat:@"%d", [jsonDataLogin length]] forHTTPHeaderField:@"content-Length"];

        [request setHTTPBody:jsonDataLogin];
        NSLog(@"jsonData: %@",jsonDataLogin);


        NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:true];

        [connection start];   
    }

之后,在我的委托方法中:

-   (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)theData{

    NSLog(@"String sent from server %@",[[NSString alloc] initWithData:theData encoding:NSUTF8StringEncoding]);

}

我的PHP代码:

<?
    $hash = $_POST['hash_app'];

    echo json_encode(array("TEST" => "swrao")); //RETURN swrao

    echo json_encode($hash); //RETURN null

        if($hash == "string_sended")
    {

         echo json_encode(array("TEST" => "YOU ARE IN")); //NO RETURN

        }


?>

NSLog 中的字符串给出了一些我在 PHP 页面中编写的消息,但是 PHP 页面没有接收到发送的数据。

有什么想法?

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