核心數據持久性，未解決的錯誤

Question

使用書籍教程，其他3個持久性方法完美無缺地工作。

2012-06-01 23：50：52.555核心數據持久性[9022：FB03]未解決 錯誤錯誤域= NSCocoaErrorDomain代碼= 134100「的操作 無法完成運行時模擬器收到此消息。（Cocoa error 134100.）「UserInfo = 0x6b92af0 {metadata = {type = immutable dict， count = 7，entries => 2：{contents = 」NSStoreModelVersionIdentifiers「} = {type = immutable，count = 1，values = {0：{contents =「」}）} 4：{contents =「NSPersistenceFrameworkVersion」} = {value = +386，type = kCFNumberSInt64Type} 6： {contents = 「NSStoreModelVersionHashes」} = {type = immutable dict， count = 1，entr IES => 1： {內容= 「線」} = {長度= 32，容量= 32，字節= 0x03913bef8e6d277b9119a99fbc7b4adc ... 39db5d5f94ed5507}} 7： {內容= 「NSStoreUUID」} = {內容= 「FE367DDA -4009-4CD1-9B8A-D62943668E8E「} 8：{contents =」NSStoreType「} = {contents =」SQLite「} 9：{contents =」_NSAutoVacuumLevel「} = {contents =」2「} 10：{contents =」 NSStoreModelVersionHashesVersion「} = {值= 3，類型= kCFNumberSInt32Type}}，原因=用來打開存儲該模型是 與用於創建存儲}的一個不兼容，{ 元數據= { NSPersistenceFrameworkVersion = 386; NSStoreModelVersionHashes = { 行= < 03913bef 8e6d277b 9119a99f bc7b4adc 4fec730a 73b61247 39db5d5f 94ed5507>; }; NSStoreModelVersionHashesVersion = 3; NSStoreModelVersionIdentifiers =（ 「」 ）; NSStoreType = SQLite; NSStoreUUID =「FE367DDA-4009-4CD1-9B8A-D62943668E8E」; 「_NSAutoVacuumLevel」= 2; }; reason =「用於打開商店的模型與用於創建商店的模型不兼容」; }

我的兩個實體設置正確，這裏是我的文件：

#import "BIDViewController.h" 
#import "BIDAppDelegate.h" 

@interface BIDViewController() 

@end 

@implementation BIDViewController 
@synthesize line1; 
@synthesize line2; 
@synthesize line3; 
@synthesize line4; 

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 
{ 
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 
    if (self) { 
     // Custom initialization 
    } 
    return self; 
} 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view from its nib. 
    BIDAppDelegate *appDelegate = 
    [[UIApplication sharedApplication] delegate]; 
    NSManagedObjectContext *context = [appDelegate managedObjectContext]; 
    NSEntityDescription *entityDescription = [NSEntityDescription 
               entityForName:@"Line" 
               inManagedObjectContext:context]; 
    NSFetchRequest *request = [[NSFetchRequest alloc] init]; 
    [request setEntity:entityDescription]; 

    NSError *error; 
    NSArray *objects = [context executeFetchRequest:request error:&error]; 
    if (objects == nil) { 
     NSLog(@"There was an error!"); 
     // Do whatever error handling is appropriate 
    } 

    for (NSManagedObject *oneObject in objects) { 
     NSNumber *lineNum = [oneObject valueForKey:@"lineNum"]; 
     NSString *lineText = [oneObject valueForKey:@"lineText"]; 

     NSString *fieldName = [NSString 
           stringWithFormat:@"line%d", [lineNum integerValue]]; 
     UITextField *theField = [self valueForKey:fieldName]; 
     theField.text = lineText; 
    } 

UIApplication *app = [UIApplication sharedApplication]; 
[[NSNotificationCenter defaultCenter] addObserver:self 
             selector:@selector(applicationWillResignActive:) 
              name:UIApplicationWillResignActiveNotification 
              object:app]; 
} 

- (void)viewDidUnload 
{ 
    [super viewDidUnload]; 
    // Release any retained subviews of the main view. 
    // e.g. self.myOutlet = nil; 
    self.line1 = nil; 
    self.line2 = nil; 
    self.line3 = nil; 
    self.line4 = nil; 


} 

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 
{ 
    return (interfaceOrientation == UIInterfaceOrientationPortrait); 
} 

-(void)applicationWillResignActive:(NSNotification *) notification { 
    BIDAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate]; 
    NSManagedObjectContext *context = [appDelegate managedObjectContext]; 
    NSError *error; 
    for (int i = 1; i <=4; i++) { 
     NSString *fieldName = [NSString stringWithFormat:@"line%d", i]; 
     UITextField *theField = [self valueForKey:fieldName]; 

     NSFetchRequest *request = [[NSFetchRequest alloc] init]; 

     NSEntityDescription *entityDescription = [NSEntityDescription 
                entityForName:@"Line" 
                inManagedObjectContext:context]; 
     [request setEntity:entityDescription]; 
     NSPredicate *pred = [NSPredicate 
          predicateWithFormat:@"(lineNum = %d)", i]; 
     [request setPredicate:pred]; 

     NSManagedObject *theLine = nil; 

     NSArray *objects = [context executeFetchRequest:request 
                error:&error]; 

     if (objects == nil) { 
      NSLog(@"There was an error!"); 
      // Do whatever error handling is appropriate 
     } 

     if ([objects count] > 0) 
      theLine = [objects objectAtIndex:0]; 
     else 
      theLine = [NSEntityDescription 
         insertNewObjectForEntityForName:@"Line" 
         inManagedObjectContext:context]; 

     [theLine setValue:[NSNumber numberWithInt:i] forKey:@"lineNum"]; 
     [theLine setValue:theField.text forKey:@"lineText"]; 
    } 
    [context save:&error]; 
} 

@end 

任何想法或意見讚賞！

Answer 1

在模擬器中初次安裝您的應用程序後，猜測您更改了核心數據模型。

reason=The model used to open the store is incompatible with the one used to create the store

你有沒有嘗試刪除並重新安裝應用程序？