我正在尝试将JSON映射到一个对象结构中,这是一个小小的问题:
- Group
+ label
+ type
+ children
- childname1
+ label
+ type
+ value
- childname2
+ label
+ type
+ value
我有Group
班
@interface CameraGroup : NSObject
@property (nonatomic, copy) NSString *label;
@property (nonatomic, copy) NSString *type;
@property (nonatomic, copy) NSDictionary *children;
@end
和Child
类
@property (nonatomic, copy) NSString *label;
@property (nonatomic, copy) NSString *type;
@property (nonatomic, copy) NSString *value;
我的JSON如下:
{
"actions": {
"label": "Action List",
"type": "section",
"children": {
"action1": {
"label": "This is action1",
"type": "toggle",
"value": 0
},
"action2": {
"label": "This is action2",
"type": "range",
"value": 0
},
"action3": {
"label": "This is action3",
"type": "toggle",
"value": 0
}
}
}
}
我正试图以一个Object of Group结束,使用RestKit持有带有键值对操作的NSDictionary(children)(例如action1 =键和标签,类型和值的子对象)。
我正在使用以下代码段,但总是最终得到一个空的子对象:
RKObjectMapping *mappingChild = [RKObjectMapping mappingForClass:[Child class]];
[mappingSetting addAttributeMappingsFromDictionary:@{
@"label": @"label",
@"type": @"type",
@"value": @"value"
}];
RKObjectMapping *mappingGroup = [RKObjectMapping mappingForClass:[Group class]];
[mappingGroup addAttributeMappingsFromDictionary:@{
@"label": @"label",
@"type": @"type"
}];
[mappingGroup addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:@"children" toKeyPath:@"children" withMapping:mappingSetting]];
NSIndexSet *statusCodes = RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful);
RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:mappingGroup method:RKRequestMethodAny pathPattern:@"/action" keyPath:@"actions" statusCodes:statusCodes];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://192.168.178.1:1337/actions"]];
RKObjectRequestOperation *operation = [[RKObjectRequestOperation alloc] initWithRequest:request responseDescriptors:@[responseDescriptor]];
[operation setCompletionBlockWithSuccess:^(RKObjectRequestOperation *operation, RKMappingResult *result) {
Group *group = [result firstObject];
NSLog(@"Mapped the group: %@ of type %@ with children %i", article.label, article.label, [group.children count]);
} failure:^(RKObjectRequestOperation *operation, NSError *error) {
NSLog(@"Failed with error: %@", [error localizedDescription]);
}];
[operation start];
那么有没有办法如何映射NSDictionary部分而不知道“action1”被命名为“action1”??
答案 0 :(得分:4)
在玩完之后我发现了一个似乎有用的解决方案。 responseDescriptor
获取具有关系映射的Group
到dynamicMapping
的映射,该映射遍历所有子节点并映射childMapping
RKObjectMapping *mappingChild = [RKObjectMapping mappingForClass:[Child class]];
[mappingSetting addAttributeMappingsFromDictionary:@{
@"label" : @"label",
@"type" : @"type",
@"value" : @"value"
}];
RKDynamicMapping* dynamicMapping = [RKDynamicMapping new];
[dynamicMapping setObjectMappingForRepresentationBlock:^RKObjectMapping *(id representation) {
NSArray *keys = [representation allKeys];
RKObjectMapping *dataMapping = [RKObjectMapping mappingForClass:[NSMutableDictionary class]];
for (NSString *key in keys) {
[dataMapping addRelationshipMappingWithSourceKeyPath:key mapping:mappingChild];
}
return dataMapping;
}];
RKObjectMapping *mappingGroup = [RKObjectMapping mappingForClass:[Group class]];
[Group addAttributeMappingsFromDictionary:@{
@"label": @"label",
@"type": @"type"
}];
[Group addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:@"children" toKeyPath:@"children" withMapping:dynamicMapping]];
NSIndexSet *statusCodes = RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful);
RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:mappingGroup
method:RKRequestMethodAny
pathPattern:@"/actions"
keyPath:@"actions"
statusCodes:statusCodes];