如何使用RestKit RKObjectMapping映射下面的嵌套json？我只需要映射“数据”.我当前的代码返回(null) – 谢谢！
{
"sucess": true,"error": {
"code": "","message": ""
},"data": [
{
"id": 1,"name": "Salad","description": "Salad Desc","category_id": 1
},{
"id": 2,"name": "Soup","description": "Soup Desc",{
"id": 3,"name": "Wrap","description": "Wrap Desc",{
"id": 4,"name": "Appetizers","description": "Appetizers Desc","category_id": 1
}
]
}
类
@interface Subcategory : NSObject
@property (nonatomic,retain) NSNumber *subcategoryID;
@property (nonatomic,retain) NSNumber *categoryID;
@property (nonatomic,retain) NSString *name;
@property (nonatomic,retain) NSString *description;
@property (nonatomic,retain) NSString *thumbnail;
@property (nonatomic,retain) NSArray *data;
视图控制器
RKObjectMapping* mapping = [RKObjectMapping mappingForClass:[Subcategory class]]; RKObjectMapping* dataMapping = [RKObjectMapping mappingForClass:[Subcategory class]]; [dataMapping mapKeyPath:@"id" toAttribute:@"subcategoryID"]; [dataMapping mapKeyPath:@"category_id" toAttribute:@"categoryID"]; [dataMapping mapAttributes:@"name",@"description",nil]; [mapping mapKeyPath:@"data" toRelationship:@"data" withMapping:dataMapping]; [[RKObjectManager sharedManager] loadObjectsAtResourcePath:[NSString stringWith
解决方法
您缺少rootKeyPath并且还在提供程序中设置映射：
RKObjectMapping* mapping = [RKObjectMapping mappingForClass:[Subcategory class]]; RKObjectMapping* dataMapping = [RKObjectMapping mappingForClass:[Subcategory class]]; [dataMapping mapKeyPath:@"id" toAttribute:@"subcategoryID"]; [dataMapping mapKeyPath:@"category_id" toAttribute:@"categoryID"]; [dataMapping mapAttributes:@"name",nil]; dataMapping.rootKeyPath = @"data"; //this is what you were missing //get your mapping provider (i'm not sure if you already have on declared) [mappingProvider setObjectMapping:dataMapping forResourcePathPattern:@"/somepath/toservice/"]; [[RKObjectManager sharedManager] loadObjectsAtResourcePath:@"/somepath/toservice/"];
- (void)objectLoader:(RKObjectLoader *)objectLoader didFailWithError:(NSError *)error {
NSError *parseError = nil;
id response = [objectLoader.response parsedBody:&parseError];
DLog(@"response %@",response);
if (!parseError) {
NSString *errorMessage = [[response valueForKey:@"error"] valueForKey:@"message"];
//do something with it
}
}
