Month: July 2013

Please note, this blog entry is from a previous course. You might want to check out the current one.

Make one or more of your table views searchable. Check out UISearchDisplayController and UISearchBar.

Add a bar button to enable the search functionality in code and initialize it lazily:

@property (nonatomic, strong) IBOutlet UIBarButtonItem *searchButton;
...
- (UIBarButtonItem *)searchButton
{
    if (!_searchButton) {
        _searchButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSearch
                                                                      target:self
                                                                      action:@selector(searchButtonPressed:)];
                         
    }
    return _searchButton;
}

- (void)viewDidLoad
{
    ...
    self.navigationItem.rightBarButtonItem = self.searchButton;
}

Continue reading “cs193p – Assignment #6 Extra Task #4”

Please note, this blog entry is from a previous course. You might want to check out the current one.

Have a row in your main table view called “All” which shows all the photos (not just the photos with a certain tag). Then have the table that appears when you click on “All” be divided into sections by tag (i.e., each section is one of the tags). The simplest way to add the “All” row is to update the information in your database a little bit rather than trying to special-case your table view code (though you will need a special case to turn on sections for that particular table of all photos since you don’t want other tables of photos to have sections). Luckily “All” is alphabetically at the top of the list of types of places, but can you think of a way to modify your schema/fetch criteria to ensure that it is always the top item in the list even if it’s not called “All” or if there were an “Abattoir” tag in the list?

Just add an additional tag for “All” to all photos. To circumvent to “Abattoir” sorting problem, name it so that it will be always be first, e.g.:

#define ALL_TAGS_STRING @"00000"
...
+ (NSSet *)tagsFromFlickrInfo:(NSDictionary *)photoDictionary
       inManagedObjectContext:(NSManagedObjectContext *)context
{
    ...
    tagStrings = [tagStrings arrayByAddingObject:ALL_TAGS_STRING];
    ...
}

Continue reading “cs193p – Assignment #6 Extra Task #3”

Please note, this blog entry is from a previous course. You might want to check out the current one.

Allow users to delete photos (i.e. they no longer appear in tables). You should do it in a way that makes it so that the UIRefreshControl does not bring them back!

Deleting of cells is enabled by providing the appropriate delegate method. There delete the current photo and save the core-data document:

-  (void)tableView:(UITableView *)tableView
commitEditingStyle:(UITableViewCellEditingStyle)editingStyle
 forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        Photo *photo = [self.fetchedResultsController objectAtIndexPath:indexPath];
        [photo.managedObjectContext performBlock:^{
            [photo delete];
            [[SharedDocumentHandler sharedDocumentHandler] saveDocument];
        }];
    }
}

Continue reading “cs193p – Assignment #6 Extra Task #2”