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我的問題的簡短版本:我刪除一個對象,並在我做了一個提取之後返回以前刪除的對象。核心數據獲取已刪除的對象
我下面這個架構: SyncService - >持久性服務 - > NSManagedObject
我所有的持久化服務層類是以下類的子類:
# PersistenceService.h
#import <Foundation/Foundation.h>
@interface PersistenceService : NSObject
@property (nonatomic, retain) NSManagedObjectContext *context;
-(instancetype) init;
-(void) saveContext;
@end
# PersistenceService.m
@implementation PersistenceService
-(instancetype) init {
self = [super init];
if (self) {
self.context = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSPrivateQueueConcurrencyType];
self.context.parentContext = [DataManager sharedInstance].managedObjectContext;
}
return self;
}
-(void) saveContext {
NSManagedObjectContext *context = self.context.parentContext;
[self.context performBlock:^{
NSError *error;
[self.context save:&error];
[context performBlock:^{
NSError *error;
[context save:&error];
[context.parentContext performBlock:^{
NSError *error;
[context.parentContext save:&error];
}];
}];
}];
}
@end
刪除之前,我在我的主要上下文中取對象:
# Synchronizer.m
-(void) synchronize {
NSArray *pseudoLeads = [[[PseudoLeadPersistenceService alloc] init] getAllParentPseudoLeads];
if (pseudoLeads) {
PseudoLeadDAO *pseudoLead = [pseudoLeads objectAtIndex:0];
if ([pseudoLead.type isEqualToNumber:[NSNumber numberWithInt:Capture]]) {
CaptureSyncService *service = [[CaptureSyncService alloc] initWithDelegate:self andPseudoLead:pseudoLead];
[service executeRequest];
} else {
HotleadSyncService *service = [[HotleadSyncService alloc] initWithDelegate:self andPseudoLead:pseudoLead];
[service executeRequest];
}
}
}
。
# PseudoLeadPersistenceService.m
-(NSArray *) getAllParentPseudoLeads {
return [PseudoLeadDAO findAllParentPseudoLeadsInContext:self.context.parentContext];
}
在這裏,我取,在我的子上下文實際刪除對象:
# PseudoLeadPersistenceService.m
-(void) deletePseudoLeadById:(NSNumber *)pseudoLeadId andEventId:(NSNumber *)eventId {
PseudoLeadDAO *pseudoLeadDAO = [PseudoLeadDAO findPseudoLeadById:pseudoLeadId andEventId:eventId inContext:self.context];
[self.context deleteObject:pseudoLeadDAO];
[self saveContext];
}
然後-(void) synchronize
再次調用和刪除的對象再次顯示爲故障。在這一點上,我可以根據需要多次獲取並返回。當它再次出現-(void) deletePseudoLeadById:(NSNumber *)pseudoLeadId andEventId:(NSNumber *)eventId
方法時,它只會消失,並且會觸發故障。
我會很感激任何幫助。謝謝!