自从将我的 IOS 代码升级为使用 AFNetworking 版本 2.0 而不是 1.x 后，我无法再使用 JSON 参数进行 HTTP Post。

我怀疑这是因为我的 HTTP 请求 header 不是“application/json”，但我已经尝试这样做，但它仍然不起作用。

这是我尝试通过 JSON 进行 POST 的测试代码:

NSDictionary *parameters = [NSDictionary dictionaryWithObjectsAndKeys:
                                email, @"email",
                                password, @"password",
                                nil];

[[OTApiClient sharedInstance] POST:@"login" parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"result: %@", responseObject);

        Boolean response = [[responseObject valueForKey:@"success"] boolValue];
        if(response == TRUE) {
            //ok, success
            NSLog(@"success");

            UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Success!" message:@"Successfully logged in" delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil];
            [alert show];


        } else {
            NSLog(@"Not successful");

            UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Sorry" message:@"The email or password is incorrect." delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil];
            [alert show];
        }


        dispatch_async(dispatch_get_main_queue(), ^{
            [MBProgressHUD hideHUDForView:self.view animated:YES];
        });


    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"error: %@ ,  for operation: %@", error, operation);


        UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Sorry" message:@"There is a problem connecting to the server, please try again soon." delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil];
        [alert show];


        dispatch_async(dispatch_get_main_queue(), ^{
            [MBProgressHUD hideHUDForView:self.view animated:YES];
        });
    }];

});

我一直收到这个错误:

Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa  error 3840.)" (JSON text did not start with array or object and option to allow fragments not set.) UserInfo=0xca80730 {NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.} ,  for operation: <AFHTTPRequestOperation: 0xca6bee0, state: isFinished, cancelled: NO request: <NSMutableURLRequest: 0xca76040> { URL: http://1.2.3.4:9000/api/login }, response: <NSHTTPURLResponse: 0xc963d60> { URL: http://1.2.3.4:9000/error404 } { status code: 404, headers {
"Content-Length" = 1809;
"Content-Type" = "text/html; charset=utf-8";

} }>

我非常确定服务器已启动并且可以访问，因为所有其他 GET 调用都正常工作。

我已经检查了 AFNetworking 2.0 的更新文档，看起来我所拥有的是执行 JSON POST 的正确方法

如有遗漏请告知

谢谢 是

最佳答案

实际上，我终于让它工作了。

基本上，对于 AFHTTPRequestOperationManager 的 requestSerializer，我使用的是 AFHTTPRequestSerializer，然后尝试将 Content-Type 设置为“application/json”

但是一旦我改用 AFJSONRequestSerializer，它现在工作正常

AFJSONRequestSerializer *requestSerializer = [AFJSONRequestSerializer serializer];

[requestSerializer setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[requestSerializer setValue:@"application/json" forHTTPHeaderField:@"Accept"];

operationManagerInstance.requestSerializer = requestSerializer;

关于ios - AF 网络 2.0 : Cannot POST with JSON from IOS，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20385353/