json - Restkit 0.22.0 如何映射没有要发布的 keyPath 的简单 JSON 响应

Question

为简单起见，Rest API 发送此 JSON response-body= { "status": "ok"}。

我设置了我的 Restkit 映射，比如...创建了一个名为 StatusResponse 的类，它有一个 @property (nonatomic, assign) NSString *status;

RKObjectMapping *statusResponseMapping = [RKObjectMapping mappingForClass:[StatusResponse class]];
    [statusResponseMapping addAttributeMappingsFromDictionary:@{@"status":@"status"}]; 

// also tried : [statusResponseMapping addAttributeMappingsFromDictionary:@[@"status"]]; which resulted in same error

    NSIndexSet *statusCodes = RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful);

RKResponseDescriptor *statusResponseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:statusResponseMapping method:RKRequestMethodPOST pathPattern:@"status" keyPath:nil statusCodes:statusCodes];

[[RKObjectManager sharedManager] addResponseDescriptor:statusResponseDescriptor];

I'm running a post which is successful, but I get this error back:

NSUnderlyingError=0x17024d440 "No mappable object representations were found at the key paths searched.", keyPath=null, NSLocalizedDescription=No response descriptors match the response loaded.}
response.body={
  "status": "ok"
}

对此的任何帮助将不胜感激。

Answer 1

您应该尝试将 keyPath 设为 @""并将 pathPattern 设为 nil，这是我正在使用的一段代码，它对我来说非常适合。我正在做与您正在尝试做的完全相同的事情。

RKResponseDescriptor *statusResponseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:[ResponseStatus rkObjectMappingForResponse:YES] method:RKRequestMethodAny pathPattern:nil keyPath:@"" statusCodes:statusCodes];