CODEWITHSUNDEEP
iosuitableviewnsuserdefaultsdelete-rownskeyedarchiver
Mou某
Mou某

Reputation: 596

Deleting Rows From Table View | NSUserDefaults + NSKeyedArchiver

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    myFavsTwo = [NSMutableArray arrayWithArray:[NSKeyedUnarchiver unarchiveObjectWithData:[[[NSUserDefaults standardUserDefaults] objectForKey:@"MyFavoritez"] mutableCopy]]];
    [self.tableView reloadData];
    NSLog(@"Number of items in my array is: %d", [myFavsTwo count]);
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
    NSLog(@"Number of items in my array is: %d", indexPath.row+1);
    [myFavsTwo removeObjectAtIndex:indexPath.row];
    [self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
   [[NSUserDefaults standardUserDefaults] setObject:[NSKeyedArchiver archivedDataWithRootObject:myFavsTwo] forKey:@"MyFavoritez"];
    [[NSUserDefaults standardUserDefaults] synchronize];
}

on delete my app keeps crashing at:

       [[NSUserDefaults standardUserDefaults] setObject:[NSKeyedArchiver
archivedDataWithRootObject:myFavsTwo] forKey:@"MyFavoritez"];

if I 'continue' on my debugging it still works as it should and everything continues like normal... not getting any error messages either just a 'break point' message

my view will appear looks like this:

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    myFavsTwo = [NSKeyedUnarchiver unarchiveObjectWithData:[[[NSUserDefaults standardUserDefaults] objectForKey:@"MyFavoritez"] mutableCopy]];
    [self.tableView reloadData];
    NSLog(@"Number of items in my array is: %d", [myFavsTwo count]);
}

and the info is coming from here:

- (void)buttonPressed:(id) sender
{

    NSMutableArray *myfavs = [[[NSUserDefaults standardUserDefaults] objectForKey:@"MyFavoritez"]mutableCopy];
    if(myfavs != nil)
    {
        NSLog(@"Array found. Contents: %@",myfavs);
    }
    else
    {
        myfavs = [[NSMutableArray alloc] initWithCapacity:0];
    }
    NSUserDefaults *currentDefaults = [NSUserDefaults standardUserDefaults];
    NSData *dataRepresentingSavedArray = [currentDefaults objectForKey:@"MyFavoritez"];
    if (dataRepresentingSavedArray != nil)
    {
        NSArray *oldSavedArray = [NSKeyedUnarchiver unarchiveObjectWithData:dataRepresentingSavedArray];
        if (oldSavedArray != nil)
            _myfavs = [[NSMutableArray alloc] initWithArray:oldSavedArray];
        else
            _myfavs = [[NSMutableArray alloc] init];
    }

    [_myfavs addObject:self.word];
    [[NSUserDefaults standardUserDefaults] setObject:[NSKeyedArchiver archivedDataWithRootObject:_myfavs] forKey:@"MyFavoritez"];
    [[NSUserDefaults standardUserDefaults] synchronize];
    NSLog(@"Number of items in my array is: %d", [_myfavs count]);
}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {


    if ([[segue identifier] isEqualToString:@"passFavs"]) {
        FavViewController *con = segue.destinationViewController;
        con.myFavsTwo = _myfavs;    }
}

hope that's not TMI

Upvotes: 0

Views: 290

Answers (1)

Paulw11
Paulw11

Reputation: 114846

Have a look at the advice given in this answer - crash on deleteRowsAtIndexPaths in particular it is good practice to bracket your updates to the table view and your data model with [self.tableView beginUpdates] and [self.tableView endUpdates]

Upvotes: 1

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