saveing checkboxbutton in tableview - save

Question

i am working with Storybord and i got a tableview with a checkboxbutton.
and i am using NSUserDefaults to save the state of my checkboxbutton i tried to save it with Core Data but i dont know how so its better to go to the easy way NSUserDefaults .
and the checkboxbutton is working great but the problem it does not save the state of the checkboxbutton !!!
when i close the app and open it again its not saved .
can any one please help me here i did all my best to solve this problem but no luck
here is my code
#property (strong, nonatomic) IBOutlet UIButton *myButton;
#property (nonatomic,assign) BOOL checked;
#synthesize myButton,checked;
- (void)viewDidLoad
{
[super viewDidLoad];
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
checked = [defaults boolForKey:#"boxIsChecked"];
[defaults synchronize];
[self checkTheBox];
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell =
[tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
// Configure the cell...
NSManagedObject *device = [self.Work objectAtIndex:indexPath.row];
[cell.textLabel setText= [Work valueForKey:#"name"]
myButton = [UIButton buttonWithType:UIButtonTypeCustom] ;
[myButton setFrame:CGRectMake(260,2,40,40)];
myButton.tag = indexPath.row;
[myButton setImage:[UIImage imageNamed:#"checkBox.png"] forState:UIControlStateNormal];
[myButton addTarget:self action:#selector(ButtonCheckMark:)
forControlEvents:UIControlEventTouchUpInside];
[cell addSubview:myButton];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
return cell;
}
- (IBAction)ButtonCheckMark:(id)sender {
myButton = (UIButton *)sender;
NSLog(#"playButton %li" , (long)myButton.tag);
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
if (!checked) {
[myButton setImage:
[UIImage imageNamed:#"checkBoxMarked.png"] forState:UIControlStateNormal];
checked = YES;
[defaults setBool:checked forKey:#"boxIsChecked"];
}
else if (checked) {
[myButton setImage:
[UIImage imageNamed:#"checkBox.png"] forState:UIControlStateNormal];
checked = NO;
[defaults setBool:checked forKey:#"boxIsChecked"];
}
[defaults synchronize];
}
- (void) checkTheBox {
if (!checked) {
[myButton setImage:
[UIImage imageNamed:#"checkBox.png"] forState:UIControlStateNormal];
}
else if (checked) {
[myButton setImage:
[UIImage imageNamed:#"checkBoxMarked.png"] forState:UIControlStateNormal];
}
}