Reload UITableView with New NSUserDefault Values - ios

Question

I have an array of dictionaries in NSUserDefaults and those values are used to display data in a table view in another tab on the tab bar. It works ok if I add a new value to my NSUserDefaults array and close the app then go back into it and go the table view tab. The problem I'm having is when I add a new object to the user defaults array then go to the table view tab without leaving the app. When I do this, the table view does not show the just added values.
Here is where I add the dictionaries to NSUserDefaults:
- (void)addFavorite {
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSMutableArray *favoritesLoaded = [defaults objectForKey:#"favorites"];
NSDictionary *fav = [NSDictionary dictionaryWithObjectsAndKeys:
self.postTitle, #"title",
self.postUrlString, #"url",
nil];
NSMutableArray *favorites = [NSMutableArray array];
if (favoritesLoaded) {
favorites = [[NSMutableArray alloc] initWithArray:favoritesLoaded];
} else {
favorites = [[NSMutableArray alloc] init];
}
[favorites insertObject:fav atIndex:0];
[defaults setObject:favorites forKey:#"favorites"];
[defaults synchronize];
}
In my table view:
- (void)viewDidLoad {
[super viewDidLoad];
self.navigationItem.rightBarButtonItem = self.editButtonItem;
[self.tableView setDataSource:self];
[self.tableView setDelegate:self];
self.tableView.backgroundColor = [UIColor blackColor];
if ([[NSUserDefaults standardUserDefaults] objectForKey:#"favorites"]) {
self.redditPosts = [[NSUserDefaults standardUserDefaults] objectForKey:#"favorites"];
}
else {
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
CustomCell *cell = [tableView dequeueReusableCellWithIdentifier:#"CustomCell"];
NSDictionary *post = [self.redditPosts objectAtIndex:[indexPath row]];
if (cell == nil) {
cell = [[CustomCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"CustomCell"];
}
if (cell) {
cell.textLabel.text = [post objectForKey:#"title"];
cell.backgroundColor = [UIColor clearColor];
cell.textLabel.textColor = [UIColor whiteColor];
}
return cell;
}

Answer 1

just after inserting your new content you should reload the tableView:
[self.tableView reloadData];
if this can take a while you can use the following so it won't freeze-up your app:
dispatch_async(dispatch_get_main_queue(), ^{
[self.tableView reloadData];
});