ios - 使用 AFNetworking 2 处理响应

Question

我真的是 IOS 开发的新手。我想开发一个处理某些 Web 服务并在表格 View 中显示的应用程序。不知何故，我找到了一个用于网络工作的第三方库 [AFNetworking 2]。下面是我的代码，用于获取任何给定 url 和参数的 json 响应。

-(NSDictionary*)getWebServiceResponce:(NSString *)url :(NSDictionary *)object
{

   // NSDictionary *parameters = [[NSDictionary alloc] initWithObjectsAndKeys:@"47", @"caregiverPersonId", nil];
  __block NSDictionary* result=Nil;
  __block NSString* person=Nil;


    AFSecurityPolicy *policy = [[AFSecurityPolicy alloc] init];
    [policy setAllowInvalidCertificates:YES];

    AFHTTPRequestOperationManager *operationManager = [AFHTTPRequestOperationManager manager];
    [operationManager setSecurityPolicy:policy];
    operationManager.requestSerializer = [AFJSONRequestSerializer serializer];
    operationManager.responseSerializer = [AFJSONResponseSerializer serializer];

    [operationManager POST:url
                parameters:object
                   success:^(AFHTTPRequestOperation *operation, id responseObject) {


                     NSLog(@"JSON: %@", [responseObject description]);
                       person = [responseObject[@"d"]objectForKey:@"PersonId"];
                     //  [self returnedResponce:responseObject];
                       result = (NSDictionary *) responseObject[@"d"];
                        NSLog(@"RESULT: %@", result);
                        NSLog(@"personm: %@", person);
                       [operation waitUntilFinished];
                   }
                   failure:^(AFHTTPRequestOperation *operation, NSError *error) {
                       NSLog(@"Error: %@", [error description]);
                       //result = [error];
                   }
     ];

    return result;
    }

这段代码工作完美......但我的观点是，当我放置一些断点来检查我得到的几个变量的值时，它显示为空。但我的日志显示了整个 json 响应。

我想将我的响应对象作为字典返回。因为我想对响应进行一些处理..有人可以帮助我吗？

Answer 1

问题是 result 返回时为 nil。 AFNetworking 使用 ObjC 的 awesome block ，它们是异步执行的。 Read more about it here .

您应该在 getWebServiceResponce 方法中包含一个回调 block 。我整理了一些代码，但您真的应该阅读更多关于 block 的内容。

-(void)webServiceResponceForURL:(NSString *)url dictionary:(NSDictionary *)object success:(void (^)(NSDictionary *responseObject))success {
// NSDictionary *parameters = [[NSDictionary alloc] initWithObjectsAndKeys:@"47", @"caregiverPersonId", nil];
__block NSDictionary* result=Nil;
__block NSString* person=Nil;

AFSecurityPolicy *policy = [[AFSecurityPolicy alloc] init];
[policy setAllowInvalidCertificates:YES];

AFHTTPRequestOperationManager *operationManager = [AFHTTPRequestOperationManager manager];
[operationManager setSecurityPolicy:policy];
operationManager.requestSerializer = [AFJSONRequestSerializer serializer];
operationManager.responseSerializer = [AFJSONResponseSerializer serializer];
[operationManager POST:url
            parameters:object
               success:^(AFHTTPRequestOperation *operation, id responseObject) {
                   NSLog(@"JSON: %@", [responseObject description]);
                   person = [responseObject[@"d"]objectForKey:@"PersonId"];
                   //  [self returnedResponce:responseObject];
                   result = (NSDictionary *) responseObject[@"d"];
                   NSLog(@"RESULT: %@", result);
                   NSLog(@"personm: %@", person);

                   //We are executing the block as soon as we have the results.
                   if (success) {
                       success(responseObject);
                   }
               }
               failure:^(AFHTTPRequestOperation *operation, NSError *error) {
                   NSLog(@"Error: %@", [error description]);
                   //result = [error];
               }
 ];
}

编辑:

[self webServiceResponceForURL:@"foo://foo" dictionary:nil success:^(NSDictionary *responseObject) {
    //your code here
}