我正在尝试将使用 Restkit 0.1 的现有应用程序更新到 0.20,但是在设置 Core Data Stack 时遇到了一些问题,因为它遇到了异常。
我的 AppDelegate 上有以下代码:
/*
Complete Core Data stack initialization
*/
NSError *error = nil;
NSURL *modelURL = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"AppModel" ofType:@"momd"]];
// NOTE: Due to an iOS 5 bug, the managed object model returned is immutable.
NSManagedObjectModel *managedObjectModel = [[[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL] mutableCopy];
RKManagedObjectStore *managedObjectStore = [[RKManagedObjectStore alloc] initWithManagedObjectModel:managedObjectModel];
[managedObjectStore createPersistentStoreCoordinator];
NSString *storePath = [RKApplicationDataDirectory() stringByAppendingPathComponent:@"TSI.sqlite"];
NSString *seedPath = [[NSBundle mainBundle] pathForResource:@"RKSeedDatabase" ofType:@"sqlite"];
//NSPersistentStore __unused *persistentStore = [managedObjectStore addInMemoryPersistentStore:&error];
NSPersistentStore *persistentStore = [managedObjectStore addSQLitePersistentStoreAtPath:storePath fromSeedDatabaseAtPath:seedPath withConfiguration:nil options:nil error:&error];
NSAssert(persistentStore, @"Failed to add persistent store with error: %@", error);
/*
RESTKIT
*/
// Create the managed object contexts
[managedObjectStore createManagedObjectContexts];
managedObjectStore.managedObjectCache = [[RKInMemoryManagedObjectCache alloc] initWithManagedObjectContext:managedObjectStore.persistentStoreManagedObjectContext];
然后我的映射在 TableViewController 中设置为:
RKManagedObjectStore *managedObjectStore = [RKManagedObjectStore defaultStore];
NSManagedObjectContext* context = [managedObjectStore mainQueueManagedObjectContext];
NSString *rootKeyPath;
rootKeyPath = @"body";
NSString *endpoint = @"account/login.json";
RKEntityMapping *entityMapping = [RKEntityMapping mappingForEntityForName:@"User" inManagedObjectStore:managedObjectStore];
[entityMapping addAttributeMappingsFromDictionary:@{
@"api_token":@"token",
@"email": @"email",
@"first_name": @"name",
@"last_name": @"surname"
}];
RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:entityMapping pathPattern:endpoint keyPath:rootKeyPath statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:[TSI_SERVER stringByAppendingString:endpoint]]];
RKManagedObjectRequestOperation *managedObjectRequestOperation = [[RKManagedObjectRequestOperation alloc] initWithRequest:request responseDescriptors:@[ responseDescriptor ]];
//managedObjectRequestOperation.managedObjectContext = self.managedObjectContext;
[[NSOperationQueue currentQueue] addOperation:managedObjectRequestOperation];
但是,每当我在加载视图后尝试检索数据时,我都会在控制台中收到以下错误(出于安全原因,我已经屏蔽了我的应用程序使用的名称和服务器):
2013-04-16 14:41:50.576 <<MyApp>>[4525:907] I restkit:RKLog.m:34 RestKit logging initialized...
2013-04-16 14:41:51.009 <<MyApp>>[4525:907] [HEATMA.PS] Running Heatma.ps version 4.0.2. For help go to www.heatma.ps/support
2013-04-16 14:42:54.464 <<MyApp>>[4525:3907] *** Assertion failure in
-[RKManagedObjectResponseMapperOperation performMappingWithObject:error:], /Users/manuel_matute/Code/RestKit/Code/Network/RKResponseMapperOperation.m:358
2013-04-16 14:42:59.876 <<MyApp>>[4525:3907] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Unable to perform mapping: No `managedObjectContext` assigned. (Mapping response.URL = http://www.<<myserver>>.com/rest/account/login.json)'
*** First throw call stack: (0x32a7b2a3 0x3a7a397f 0x32a7b15d 0x33350ab7 0xe37e1 0xe1b97 0x333085c1 0x33380be3 0x3abbb11f 0x3abbf961 0x3abbfac1 0x3abefa11 0x3abef8a4) libc++abi.dylib: terminate called throwing an exception
有谁知道可能是什么问题?
谢谢!