Question

我写了一个Mac App来生成我的sqlite文件，然后将其复制到我的iOS App。

当我想更改iOS App中的某些数据时，我发现无法保存更改。

错误是：Error Domain=NSCocoaErrorDomain Code=134030

在Mac上创建sqlite的代码：

NSManagedObjectModel *mode = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelPath];
NSPersistentStoreCoordinator *coordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:mode];

NSDictionary *options = @{
                          NSReadOnlyPersistentStoreOption : @YES,
                          NSSQLitePragmasOption: @{@"journal_mode":@"DELETE"}
                          };

[coordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:sqlitePath options:options error:nil];

NSManagedObjectContext *managedObjectContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSPrivateQueueConcurrencyType];
managedObjectContext.persistentStoreCoordinator = coordinator;
managedObjectContext.undoManager = nil;

[managedObjectContext performBlockAndWait:^{
    for (ClipCard *currentCard in self.allCards)
    {
        ClipItem *clipInfo = [NSEntityDescription insertNewObjectForEntityForName:@"ClipItem" inManagedObjectContext:managedObjectContext];

        clipInfo.clipName = currentCard.clipName;
    }

    [managedObjectContext save:nil];
    [managedObjectContext reset];
}];

iOS上的读取和更改代码：

- (NSPersistentStoreCoordinator *)persistentStoreCoordinator
{
    if (_persistentStoreCoordinator == nil)
    {
        _persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:self.managedObjectModel];

        NSURL *storeClipData = [[NSBundle mainBundle] URLForResource:@"ClipItems" withExtension:@"sqlite"];

        NSDictionary *options = @{
                              NSReadOnlyPersistentStoreOption : @YES,
                              NSSQLitePragmasOption: @{@"journal_mode":@"DELETE"}
                              };

        [_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeClipData options:options error:nil];
    }
    return _persistentStoreCoordinator;
}

//fetch data
NSFetchRequest *fetch = [NSFetchRequest fetchRequestWithEntityName:@"ClipItem"];
fetch.returnsObjectsAsFaults = false;

NSError *error = nil;
self.clipItems = [self.managedObjectContext executeFetchRequest:fetch error:&error];

//change some
if ([self.managedObjectContext hasChanges])
{
    NSError *error = nil;
    [self.managedObjectContext save:&error];
    NSLog(@"save error: %@", error);
}

希望我已经明白了，任何帮助都会受到赞赏吗？

顺便说一句，我不知道为什么我的堆栈溢出帐户无法登录，所以我注册了一个新的。

无法使用CoreData更新数据

0 个答案: