Question

我在IOS上使用restkit。我在解析一个简单的json对象时遇到了麻烦。

我有一个简单的json对象返回：

{"_id"=>"537c235189d50fabcc000009",
 "about"=>"nice",
 "headline"=>"looking",
 "access_token"=>
  "$2a$10$oZ4IiaVBxHhc1qGeBoZv1uYonBM3Qb5Y010rTkUOynDZIGdGagqJy"}

我的设置：

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self configureRestKit];
    [self loadVenues];
}

- (void)loadVenues
{
    NSString *clientToken = SNAPTOKEN;
    NSDictionary *profile = @{@"os": @"iOS",
                              @"device_token": @"first_token",
                              @"password":@"password",
                              @"email":@"email",
                              @"headline":@"hello world"};

    NSDictionary *queryParams = @{@"token" : clientToken,
                                  @"profile" : profile};

    [[RKObjectManager sharedManager] postObject: nil
                                           path: @"/profiles/new"
                                           parameters:queryParams
                                              success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
                                                  NSLog(@"log%@", mappingResult );
                                                  _profile = mappingResult.array;
                                              }
                                              failure:^(RKObjectRequestOperation *operation, NSError *error) {
                                                  NSLog(@"What do you mean by 'there is no coffee?': %@", error);
                                              }];
}

- (void)configureRestKit
{
    // initialize AFNetworking HTTPClient
    NSURL *baseURL = [NSURL URLWithString:@"https://airimg.com"];
    AFHTTPClient *client = [[AFHTTPClient alloc] initWithBaseURL:baseURL];

    // initialize RestKit
    RKObjectManager *objectManager = [[RKObjectManager alloc] initWithHTTPClient:client];

    // setup object mappings
    RKObjectMapping *venueMapping = [RKObjectMapping mappingForClass:[Profile class]];
    [venueMapping addAttributeMappingsFromDictionary:@{ @"_id": @"about", @"access_token": @"headline" }];

    // register mappings with the provider using a response descriptor
    RKResponseDescriptor *responseDescriptor =
    [RKResponseDescriptor responseDescriptorWithMapping:venueMapping
                                                 method:RKRequestMethodPOST
                                            pathPattern:@"/profiles/new"
                                                keyPath:@"response"
                                            statusCodes:[NSIndexSet indexSetWithIndex:200]];

    [objectManager addResponseDescriptor:responseDescriptor];

}

我有以下错误：

NSLocalizedFailureReason=The mapping operation was unable to find any nested object representations at the key paths searched: response
The representation inputted to the mapper was found to contain nested object representations at the following key paths: _id, about, access_token, headline
This likely indicates that you have misconfigured the key paths for your mappings., NSLocalizedDescription=No mappable object representations were found at the key paths searched., keyPath=null}

Answer 1

主要问题是您的响应描述符使用response的密钥路径，而您的JSON不会在顶层包含该密钥。因此，将关键路径设置为“nil＆＃39;。

。”

此外，您的视图控制器应存储对objectManager的引用，并在以后再次使用它。目前您使用[RKObjectManager sharedManager]并返回曾经创建的第一个对象管理器，因此只要您有多个视图控制器，每个视图控制器都创建自己的对象管理器，您将遇到问题。

当然，视图控制器不一定要创建单独的对象管理器......

使用restkit解析一个简单的JSON对象

1 个答案: