錯誤添加CoreData到現有項目

Question

這裏是代碼

 #import "AppDelegate.h" 
#import "Crittercism.h" 
@interface AppDelegate() 


@end 

@implementation AppDelegate 

@synthesize managedObjectContext = _managedObjectContext; 
@synthesize managedObjectModel = _managedObjectModel; 
@synthesize persistentStoreCoordinator = _persistentStoreCoordinator; 

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 

    id context = self.managedObjectContext; 

    return YES; 
} 

#pragma mark - Core Data stack 


- (NSURL *)applicationDocumentsDirectory { 
    // The directory the application uses to store the Core Data store file. This code uses a directory named "Sceram-17.test_core" in the application's documents directory. 
    return [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject]; 
} 

- (NSManagedObjectModel *)managedObjectModel { 
    // The managed object model for the application. It is a fatal error for the application not to be able to find and load its model. 
    if (_managedObjectModel != nil) { 
     return _managedObjectModel; 
    } 
    NSURL *modelURL = [[NSBundle mainBundle] URLForResource:@"CSDCoreData" withExtension:@"momd"]; 
    _managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL]; 
    return _managedObjectModel; 
} 

- (NSPersistentStoreCoordinator *)persistentStoreCoordinator { 
    // The persistent store coordinator for the application. This implementation creates and return a coordinator, having added the store for the application to it. 
    if (_persistentStoreCoordinator != nil) { 
     return _persistentStoreCoordinator; 
    } 

    // Create the coordinator and store 

    _persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]]; 
    NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:@"Models/CSDCoreData.sqlite"]; 
    //NSURL* storeURL = [[NSBundle mainBundle] URLForResource:@"CSDCoreData" withExtension:@"sqlite"]; 
    NSError *error = nil; 
    NSString *failureReason = @"There was an error creating or loading the application's saved data."; 
    if (![_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:nil error:&error]) { 
     // Report any error we got. 
     NSMutableDictionary *dict = [NSMutableDictionary dictionary]; 
     dict[NSLocalizedDescriptionKey] = @"Failed to initialize the application's saved data"; 
     dict[NSLocalizedFailureReasonErrorKey] = failureReason; 
     dict[NSUnderlyingErrorKey] = error; 
     error = [NSError errorWithDomain:@"YOUR_ERROR_DOMAIN" code:9999 userInfo:dict]; 
     // Replace this with code to handle the error appropriately. 
     // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. 
     NSLog(@"Unresolved error %@, %@", error, [error userInfo]); 
     abort(); 
    } 

    return _persistentStoreCoordinator; 
} 


- (NSManagedObjectContext *)managedObjectContext { 
    // Returns the managed object context for the application (which is already bound to the persistent store coordinator for the application.) 
    if (_managedObjectContext != nil) { 
     return _managedObjectContext; 
    } 

    NSPersistentStoreCoordinator *coordinator = [self persistentStoreCoordinator]; 
    if (!coordinator) { 
     return nil; 
    } 
    _managedObjectContext = [[NSManagedObjectContext alloc] init]; 
    [_managedObjectContext setPersistentStoreCoordinator:coordinator]; 
    return _managedObjectContext; 
} 

#pragma mark - Core Data Saving support 

- (void)saveContext { 
    NSManagedObjectContext *managedObjectContext = self.managedObjectContext; 
    if (managedObjectContext != nil) { 
     NSError *error = nil; 
     if ([managedObjectContext hasChanges] && ![managedObjectContext save:&error]) { 
      // Replace this implementation with code to handle the error appropriately. 
      // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. 
      NSLog(@"Unresolved error %@, %@", error, [error userInfo]); 
      abort(); 
     } 
    } 
} 



@end 

和錯誤：

2015-05-23 12:36:17.339 CyberSecurityDigest[6550:799489] CoreData: error: -addPersistentStoreWithType:SQLite configuration:(null) URL:file:///Users/Scream/Library/Developer/CoreSimulator/Devices/A9D94FFA-7DFA-441C-8811-D4FB0ECC54E9/data/Containers/Data/Application/59B0108B-6019-456A-A62D-0FD8A60ED580/Documents/Models/CSDCoreData.sqlite options:(null) ... returned error Error Domain=NSCocoaErrorDomain Code=512 "The operation couldn’t be completed. (Cocoa error 512.)" UserInfo=0x7f8a21df8370 {reason=Failed to create file; code = 2} with userInfo dictionary { reason = "Failed to create file; code = 2"; } 2015-05-23 12:36:17.340 CyberSecurityDigest[6550:799489] Unresolved error Error Domain=YOUR_ERROR_DOMAIN Code=9999 "Failed to initialize the application's saved data" UserInfo=0x7f8a21daa7a0 {NSLocalizedFailureReason=There was an error creating or loading the application's saved data., NSLocalizedDescription=Failed to initialize the application's saved data, NSUnderlyingError=0x7f8a21df9270 "The operation couldn’t be completed. (Cocoa error 512.)"}, { NSLocalizedDescription = "Failed to initialize the application's saved data"; NSLocalizedFailureReason = "There was an error creating or loading the application's saved data."; NSUnderlyingError = "Error Domain=NSCocoaErrorDomain Code=512 \"The operation couldn\U2019t be completed. (Cocoa error 512.)\" UserInfo=0x7f8a21df8370 {reason=Failed to create file; code = 2}"; }

我已經加入到CSDCoreData.xcdatamode目錄模型。創建了pch文件並導入了Core Data。重新安裝

Answer 1

在這種方法中，

- (NSPersistentStoreCoordinator *)persistentStoreCoordinator 


// Create the coordinator and store 

_persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]]; 

改成這樣：

NSError *err; 
if ([[NSFileManager defaultManager] createDirectoryAtURL:[[self applicationDocumentsDirectory] URLByAppendingPathComponent:@"Models/"] withIntermediateDirectories:YES attributes:nil error:&err]) 
{ 
    NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:@"Models/CSDCoreData.sqlite"]; 
} 
else 
{ 
    NSLog(@"Something wrong: %@",err.localizedDescription); 
    abort(); 
} 

// In this position. 

if (![_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:nil error:&error]) { 
    // Report any error we got. 
    NSMutableDictionary *dict = [NSMutableDictionary dictionary]; 
    dict[NSLocalizedDescriptionKey] = @"Failed to initialize the application's saved data"; 
    dict[NSLocalizedFailureReasonErrorKey] = failureReason; 
    dict[NSUnderlyingErrorKey] = error; 
    error = [NSError errorWithDomain:@"YOUR_ERROR_DOMAIN" code:9999 userInfo:dict]; 
    // Replace this with code to handle the error appropriately. 
    // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. 
    NSLog(@"Unresolved error %@, %@", error, [error userInfo]); 
    abort(); 
} 

return _persistentStoreCoordinator; 

}