ios - AFNetworking 响应显示在日志中，但在调试器中为零

我正在使用 AFNetworking 来获取 JSON 响应。我得到的是一个 PhotoPXArray(我使用地幔创建的模型)。日志输出正是我想要的数据。我的问题是使用数据。当我设置一个断点并查看 responseObject 时，它是 nil。我不知道为什么日志会抽出数据，但调试器中的值是 nil。

我最终要做的是保存响应以供以后使用。

另外，我正在使用 Sculptor 来帮助进行序列化。

-(NSArray*) getPhotoForWordNSString*)word {
    NSArray *results = nil;
    __block NSMutableDictionary *test = nil;

    NSString *requestString = BASE_URL;
    requestString = [requestString stringByAppendingString"photos/search?term="];
    requestString = [requestString stringByAppendingString:word];
    requestString = [requestString stringByAppendingString:CONSUMER_KEY];



    NSString *encoded = [requestString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.responseSerializer = [SCLMantleResponseSerializer serializerForModelClasshotoPXArray.class];
    [manager GET:encoded
      parameters:nil
         //success:^(AFHTTPRequestOperation *operation, id responseObject) {
         success:^(AFHTTPRequestOperation *operation, id responseObject) {
             NSLog(@"JSON: %@", responseObject);
             test = responseObject;

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


    return results;
}

---

Best Answer-推荐答案

你从不设置 results 变量，所以当然会返回 nil。即使您使用了 test (您确实设置了)，这也是异步发生的，所以当您立即返回时，它也将是 nil，只获得 responseObject 稍后值。

您可以考虑采用异步模式，而是提供一个完成处理程序参数:

- (void)getPhotoForWordNSString*)word completionHandlervoid (^)(id responseObject, NSError *error))completionHandler{
    NSString *requestString = BASE_URL;
    requestString = [requestString stringByAppendingString"photos/search?term="];
    requestString = [requestString stringByAppendingString:word];
    requestString = [requestString stringByAppendingString:CONSUMER_KEY];

    NSString *encoded = [requestString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.responseSerializer = [SCLMantleResponseSerializer serializerForModelClasshotoPXArray.class];
    [manager GET:encoded parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
        if (completionHandler) {
            completionHandler(responseObject, nil);
        }
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        if (completionHandler) {
            completionHandler(nil, error);
        }
    }];
}

然后你会这样调用它:

[obj getPhotoForWord:word completionHandler:^(id responseObject, NSError *error) {
    // use responseObject here
}];

// do not use it here because the above happens asynchronously (i.e. later)

关于ios - AFNetworking 响应显示在日志中，但在调试器中为零，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29050446/