Question

我有一个rails api，可以为这些位置生成位置和菜单。在我的iOS应用程序中，我正在使用AFNetworking在表格视图中检索这些位置的json列表。

这是我用来获取位置数据的AFNetworking请求

LocationTableViewController.m

[[LocationApiClient sharedInstance] getPath:@"locations.json" parameters:nil
                                        success:^(AFHTTPRequestOperation *operation, id response) {
                                            NSLog(@"Response: %@", response);
                                            NSMutableArray *results = [NSMutableArray array];
                                            for (id locationDictionary in response) {
                                                Location *location = [[Location alloc] initWithDictionary:locationDictionary];
                                                [results addObject:location];

                                            }
                                            self.results = results;
                                            [self.tableView reloadData];
                                        }
                                        failure:^(AFHTTPRequestOperation *operation, NSError *error) {
                                            NSLog(@"Error fetching locations!");
                                            NSLog(@"%@", error);

                                        }];

为位置请求

返回的json示例

 {
    "created_at" = "2013-02-23T19:25:26Z";
    id = 2;
    lat = "48.870175";
    long = "2.779899999999998";
    name = "Disneyland Hotel";
    "places_id" = fd90769e2cf40d6cb6cb1a3d0bfd0ce5d37ed331;
    "street_address" = "Rue de la Marni\U00e8re, Chessy, France";
    "updated_at" = "2013-02-23T19:25:26Z";
},

显示名称和地址

enter image description here

当用户点击位置单元格时，我想显示该位置啤酒列表的表格视图。 rails api路由（对于location_id =＆gt; 1）为http://localhost:3000/locations/1/beers.json，并为属于location_id的啤酒输出以下json：1

    {
"created_at":"2013-02-23T19:25:53Z",
"description":"fkjgvjkg",
"id":1,"location_id":1,
"name":"nhoihioh",
"price":"2.5","style":"ipa",
"updated_at":"2013-02-23T19:25:53Z"
    }

当用户点击位置单元格时，我想显示该位置的啤酒列表，该列表通过http://localhost:3000/locations/(whatever location_id is associated with the table cell that was tapped)/beers.json消耗

当用户点击位置单元格时，如何将location_id插入到下一个表格视图中出现的以下AFNetworking请求中？

BeerTableViewController.m

[[LocationApiClient sharedInstance] getPath:@"locations/**(location_id from location table cell inserted here)**/beers.json" parameters:nil
                                        success:^(AFHTTPRequestOperation *operation, id response) {
                                            NSLog(@"Response: %@", response);
                                            NSMutableArray *results = [NSMutableArray array];
                                            for (id beerDictionary in response) {
                                                Beer *beer = [[Beer alloc] initWithDictionary:beerDictionary];
                                                [results addObject:beer];

                                            }
                                            self.results = results;
                                            [self.tableView reloadData];
                                        }
                                        failure:^(AFHTTPRequestOperation *operation, NSError *error) {
                                            NSLog(@"Error fetching beers!");
                                            NSLog(@"%@", error);

                                        }];

我假设我必须记录location_id并在点击表格单元格时将该值作为url的参数传递，但我不知道该怎么做。

Answer 1

当您使用JSON时，您应该使用AFJSONRequestOperation，因为它会将响应数据解析为字典。

AFJSONRequestOperation JSONRequestOperationWithRequest:request
                                                           success:^(NSURLRequest *request, NSHTTPURLResponse *response, id locationJSON) {

....

};

然后，您可以从字典中获取places_id并再次拨打电话获取啤酒信息。

AFNetworking嵌套参数请求

1 个答案: