如何在核心數據中保存文本字段的值？

Question

我是Core Data的新手。 需要保存文本字段的值。 我已經做好了：

Model.xcdatamodeld：“實體”->“屬性”（整數32）；

並編寫了代碼，但我不確定：

//ViewController.h
@property (weak, nonatomic) IBOutlet UITextField *textOutlet;
@property (readonly, strong, nonatomic) NSManagedObjectContext *managedObjectContext;
@property (readonly, strong, nonatomic) NSManagedObjectModel *managedObjectModel;
@property (readonly, strong, nonatomic) NSPersistentStoreCoordinator *persistentStoreCoordinator;

//ViewController.m
    -(id)init{

        NSString *const kDtabaseFileName=@"file.sqlite";
        NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory,NSUserDomainMask, YES);
        NSString *documentsDirectory=[paths objectAtIndex:0];
        NSString *databasePath=[documentsDirectory stringByAppendingPathComponent:kDtabaseFileName];

        NSManagedObjectModel *managedObjectModel=[NSManagedObjectModel mergedModelFromBundles:nil];
        NSPersistentStoreCoordinator *persistentStoreCoordinator=[[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:managedObjectModel];
        [persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:[NSURL URLWithString:databasePath] options:nil error:nil];
        NSManagedObjectContext *managedObjectContext=[[NSManagedObjectContext alloc]init];
        managedObjectContext.persistentStoreCoordinator=persistentStoreCoordinator;
        self.managedObjectContext=managedObjectContext;

        return self;
    }

接下來做什么？

Answer 1

MyObject *myObject = [NSEntityDescription insertNewObjectForEntityForName:@"MyObject" inManagedObjectContext:self.managedObjectContext];

myObject.field = anything;

這些代碼行可能會有所幫助