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使用书籍教程，其他 3 种持久性方法完美地工作。运行模拟器时收到此消息：

2012-06-01 23:50:52.555 核心数据持久性 [9022:fb03] 未解决的错误错误域 = NSCocoaErrorDomain 代码 = 134100“操作无法完成。（可可错误 134100。）”用户信息 = 0x6b92af0 {元数据 = { 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, entries => 1: {contents = "Line"} = {length = 32，容量 = 32，字节 = 0x03913bef8e6d277b9119a99fbc7b4adc ... 39db5d5f94ed5507} } 7：{contents = "NSStoreUUID"} = {contents = "FE367DDA-4009-4CD1-9B8A-D62943668E8E"} 8: {contents = "NSStoreType"} = {contents = "SQLite"} 9: {contents = "_NSAutoVacuumLevel"} = {contents = "2"} 10: {contents = "NSStoreModelVersionHashesVersion"} = {value = +3, type = kCFNumberSInt32Type} } , reason=打开商店的模型与创建商店的模型不兼容}, { metadata = { NSPersistenceFrameworkVersion = 386; NSStoreModelVersionHashes = { Line = <03913bef 8e6d277b 9119a99f bc7b4adc 4fec730a 73b61247 39db5d5f 94ed5507>;};NSStoreModelVersionHashesVersion = 3;NSStoreModelVersionIdentifiers = ("");NSStoreType = SQLite;NSStoreUUID = "FE367DDA-4009-4CD1-9B8A-D62943668E8E"; "_NSAutoVacuumLevel" = 2; }; reason = "开店的型号和开店的型号不兼容"; }

我的两个实体都设置正确，这是我的文件：

#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

任何想法或意见表示赞赏！

4

1 回答 1

2

猜猜你在模拟器中最初安装你的应用程序后改变了你的核心数据模型。

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

您是否尝试删除并重新安装该应用程序？

于 2012-06-02T04:05:32.750 回答