Ios AFNetworking JSONRequestSerializer POST requestWithMethod Newb示例

我正在尝试使用AFNetworking从iOS应用程序向云后端RESTAPI发送JSON POST请求（以创建新用户）。在我的视图控制器中

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

NSString *URLString = API_BASE_URL;
NSDictionary *parameters = @{@"userName": self.userNameTextField.text,
                             @"password": self.passwordTextField.text};

manager.requestSerializer = [[AFJSONRequestSerializer serializer] requestWithMethod:@"POST" URLString:URLString parameters:parameters error:nil];

我已经复习了，这篇，还有这篇教程，但是我的弗兰肯斯坦技巧已经不多了

编译器抱怨

Incompatible pointer types assigning to 'AFHTTPRequestSerializer<AFURLRequestSerialization> *' from 'NSMutableURLRequest *'

从“NSMutableURLRequest*”分配给“AFHTTPRequestSerializer*”的指针类型不兼容

有没有人能找到这方面的工作示例，或者我的代码可能有什么问题

具体来说，如何通过回调启动操作

试试这个：

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
NSDictionary *params = @{@"userName": username, @"password": password};
manager.responseSerializer = [AFJSONResponseSerializer serializer]; // if response JSON format
[manager POST:@"http://asd.com/login.php" parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSLog(@"%@", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"%@", error);
}];

将

responseObject

视为

NSDictionary