如何在数组属性中创建RequestDescriptor（iOS RestKit）

以下是api请求定义（json格式示例）：

object-c中有两个类：

@interface MyLocation : NSObject
@property (nonatomic, strong) NSNumber* lat;
@property (nonatomic, strong) NSNumber* lon;
@end

及

有一个问题，当我通过RKObjectManager发布帖子时，接收我帖子的服务器总是

    {"Name":"my name", "Location":[]}

---

位置数组值似乎没有正确映射，有什么问题吗？

最后我发现根本原因只是请求的mime类型设置。当我使用：

[[RKObjectManager sharedManager] setRequestSerializationMIMEType:RKMIMETypeJSON];

---

一切顺利！；）

添加跟踪日志记录，它说什么

// MyLocation attribute mapping
RKObjectMapping* attrMapping = [RKObjectMapping mappingForClass:[MyLocation class]];
[attrMapping addAttributeMappingsFromDictionary:@{@"Lon":@"lon", @"Lat":@"lat"}];
RKRelationshipMapping *relatedMapping = [RKRelationshipMapping relationshipMappingFromKeyPath:@"Location" toKeyPath:@"locations" withMapping:attrMapping];

// inverse mapping for requestDescriptor
Class class = [MyRequest class];
RKObjectMapping* reqMapping = [RKObjectMapping mappingForClass:class];
[reqMapping addAttributeMappingsFromDictionary:@{@"Name":@"name"}];
[reqMapping addPropertyMapping:relatedMapping];
RKRequestDescriptor *reqDescriptor = [RKRequestDescriptor requestDescriptorWithMapping:[reqMapping inverseMapping] objectClass:class rootKeyPath:nil method:RKRequestMethodPOST];

    {"Name":"my name", "Location":[]}

[[RKObjectManager sharedManager] setRequestSerializationMIMEType:RKMIMETypeJSON];