似乎在這裏，他們做了變通方法： Relationship between RKObjectMapping and RKEntityMapping能否混合RKEntityMapping和RKObjectMapping
可我沒有做任何變通方法混合使用？ 謝謝。
編輯：在這裏我添加一個示例JSON。我想要在覈心數據中存儲的是兩個實體Region，但沒有任何關於resultCode或resultDescription的內容。這就是我問我是否可以混合它們的原因。
{ "resultCode": 0, "resultDescription": "OK", "resultContent": [ { "region_id": 0, "description": "USA" }, { "region_id": 1, "description": "Europe" } ] }
我自己在使用傳統API時遇到了同樣的問題。這裏是我的解決方案：
響應JSON：
{
"resultCode": 0,
"resultDescription": "OK",
"resultContent": [
{
"region_id": 0,
"description": "USA"
},
{
"region_id": 1,
"description": "Europe"
}
]
}
有此問題的兩個解決方案：
@""關鍵路徑對象映射假設你已經有了屬性名稱與json密鑰名稱相同的託管類別區域
@interface Response
@property (nonatomic) NSInteger resultCode;
@property (nonatomic, strong) NSString resultDescription;
@end
@implementation Response
// Make it KV compliant
@end
映射
// Response map
RKObjectMapping* resMap = [RKObjectMapping mappingForClass: [Response class]];
[resMap addAttributeMappingsFromArray: @[@"resultCode", @"resultDescription"]];
responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:resMap method: RKRequestMethodAny pathPattern:@"" keyPath:@"" statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];
// Region map
RKEntityMapping* mapping = [RKEntityMapping mappingForEntityForName: name inManagedObjectStore:[[RKObjectManager sharedManager] managedObjectStore]];
[mapping addAttributeMappingsFromArray: @[@"region_id", @"description"]];
descriptor = [RKResponseDescriptor responseDescriptorWithMapping:mapping method: RKRequestMethodAny pathPattern:@"/api/regions" keyPath:@"resultContent" statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];
得到的結果
Response* res = [[mappingResult dictionary] objectForKey:[NSNull null]];
NSArray* reg = [[mappingResult dictionary] objectForKey:@"resultContent"];
你可以註冊RKSerialization實現
[RKMIMETypeSerialization registerClass:[NKJsonSerialization class]
forMIMEType:RKMIMETypeJSON];
而在你的序列化實現中，你可以檢查響應是否是錯誤的響應，並創建一個NSError對象，然後將它發送回Restkit。
@implementation NKJsonSerialization
+ (id)objectFromData:(NSData *)data error:(NSError **)error
{
NSError* serializingError = nil;
NSMutableDictionary* jsonObject = [NSJSONSerialization
JSONObjectWithData:data
options:NSJSONReadingMutableContainers
error:&serializingError];
// Process if there is no error
if (!serializingError)
{
NSString* resCodeStr = [jsonObject objectForKey:@"resultCode"];
if ([resCodeStr intValue] != 0) {
{
// Create your NSError for your domain, contain information about response err
serializingError == <#new created error#>
jsonObject = nil;
}else{
[jsonObject removeObjectForKey: @"resultCode"];
[jsonObject removeObjectForKey: @"resultDescription"];
serializingError = nil;
}
}
*error = serializingError;
return jsonObject;
}
如果響應包含錯誤代碼，在您的要求回調，RestKit將返回底層錯誤NSError對象是你在序列化過程剛剛創建的錯誤。
此解決方案的優點是您不必關心映射響應狀態。錯誤的響應將會（應該）作爲NSError來處理。
如果json對象包含頂級數據對象（關鍵路徑@「」），您仍然可以使用映射來獲得它，而不會產生密鑰衝突，因爲它會在解決方案＃1中發生。
我不知道你問究竟.. RKEntityMapping用於映射到核心數據實體，並且RKObjectMapping用來只是映射到正規對象表示。所以也許問題是，你是否在使用核心數據？
你好EAB，看到澄清。 – Ricardo
您需要定義兩個單獨的描述符RKObjectMapping & RKEntityMapping對象，你的情況爲StatusMapping & RegionMapping然後將它們添加到的ObjectManager，它像魅力（我給你的示例代碼和類做到這一點）：
這樣定義ResponseStatus類：
// ...
ResponseStatus.h
// ...
@interface ResponseStatus : NSObject
@property (nonatomic) BOOL resultCode;
@property (nonatomic, strong) NSString *resultDescription;
+ (RKObjectMapping *)rkObjectMappingForResponse:(BOOL)includeAll;
+ (RKObjectMapping *)rkObjectMappingForRequest:(BOOL)includeAll;
+ (NSDictionary *)rkAttributeMappingsDictionary:(BOOL)request includeAll:(BOOL)includeAll;
@end
// ...
ResponseStatus.m
// ...
@implementation ResponseStatus
+ (RKObjectMapping *)rkObjectMappingForResponse:(BOOL)includeAll {
RKObjectMapping *mapping = [RKObjectMapping mappingForClass:[ResponseStatus class]];
[mapping addAttributeMappingsFromDictionary:[self rkAttributeMappingsDictionary:NO includeAll:includeAll]];
if (includeAll) {
}
return mapping;
}
+ (RKObjectMapping *)rkObjectMappingForRequest:(BOOL)includeAll {
RKObjectMapping *mapping = [RKObjectMapping requestMapping];
[mapping addAttributeMappingsFromDictionary:[self rkAttributeMappingsDictionary:YES includeAll:includeAll]];
if (includeAll) {
}
return mapping;
}
+ (NSDictionary *)rkAttributeMappingsDictionary:(BOOL)request includeAll:(BOOL)includeAll {
NSMutableDictionary *dic = [NSMutableDictionary dictionary];
if (includeAll) {
[dic addEntriesFromDictionary:@{
@"resultCode": @"resultCode",
@"resultDescription": @"resultDescription",
}];
}
return dic;
}
@end
定義一個描述符映射爲您ResponseStatus （結果）
NSIndexSet *statusCodes = RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful); // Anything in 2xx
RKResponseDescriptor *statusResponseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:[ResponseStatus rkObjectMappingForResponse:YES] method:RKRequestMethodAny pathPattern:nil keyPath:@"" statusCodes:statusCodes];
定義一個描述符映射爲您RKEntityMapping
RKResponseDescriptor *gameResponseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:[Game rkEntityMappingForResponse:YES] method:RKRequestMethodAny pathPattern:nil keyPath:@"games" statusCodes:statusCodes];
添加響應描述符的ObjectManager
[objectManager addResponseDescriptorsFromArray:@[gameResponseDescriptor, statusResponseDescriptor]];
這是如何處理測繪成果
RKObjectRequestOperation *operation = [objectManager managedObjectRequestOperationWithRequest:requestObject managedObjectContext:managedObjectContext success: ^(RKObjectRequestOperation *operation, RKMappingResult *result) {
if ([RKUtils isResponseStatusError:[result array]])
{
//..
}
} failure: ^(RKObjectRequestOperation *operation, NSError *error)
{
NSLog(@"Failed with error: %@", [error localizedDescription]);
}];
+ (BOOL)isResponseStatusError:(NSArray *)itemsList {
if ([itemsList count] != 1) {
return NO;
}
id object = itemsList[0];
if ([object isKindOfClass:[ResponseStatus class]]) {
ResponseStatus *responseStatus = object;
if (!responseStatus.resultCode) {
NSLog(@"Error : %@", responseStatus.message);
return YES;
}
}
return NO;
}
並作出REST電話，希望這有助於。
把它們混合起來 - 給出JSON和你的數據對象的細節 – Wain
Hello Wain，看看澄清。 – Ricardo
你的問題的答案是什麼？ – jAckOdE