issue loading core data into uitableview - user-interface

Question

I have been trying to figure this issue out for days now with no luck, any advice would be greatly appreciated.
I have a uitableviewcontroller that loads data from core data. When the tableview loads, the first 6 (no matter how many objects are actually saved) are loaded. When I begin to scroll down, all of the following cells are labeled "(null)". When I go back up to the top, the data in the original 6 cells are replaced with "(null)". When I logged the contents of the array from the fetch, all of the objects from core data get logged, but when I log the contents of the cell, the first 6 contents get logged, the a long list of rows with (null) get logged.
I've tried a lot of differnet things to debug this, but nothing has worked so far.
Here is the tableviewcontroller file
-(void)viewWillAppear:(BOOL)animated
{
[self setTitle:#"My Safe"];
self.dictionaryWithContent = [[NSMutableDictionary alloc] init];
self.search = #0;
[self fetchDataFromCoreData];
[self.tableView setFrame:CGRectMake(0, 88, self.tableView.bounds.size.width, self.tableView.bounds.size.height)];
self.searchResults = [[NSMutableArray alloc] init];
self.tableView.tableHeaderView = [[UIView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, self.tableView.bounds.size.width, 44.0f)];
UIBarButtonItem *changeViewsButton = [[UIBarButtonItem alloc] initWithTitle:#"Tweets By User"
style:UIBarButtonItemStylePlain
target:self
action:#selector(switchViewControllers)];
self.navigationItem.rightBarButtonItem = changeViewsButton;
self.tableView.delegate = self;
self.tableView.dataSource = self;
// CGRect searchView = CGRectMake(0, 44, self.tableView.bounds.size.width, 44);
self.searchController = [[UISearchController alloc] initWithSearchResultsController:nil];
self.searchController.searchResultsUpdater = self;
[self.searchController loadViewIfNeeded];
self.tableView.tableHeaderView = self.searchController.searchBar;
self.searchController.dimsBackgroundDuringPresentation = NO;
self.searchController.searchBar.barTintColor = twitter_blue;
self.searchController.delegate = self;
self.searchController.searchBar.delegate = self;
[self.tableView deselectRowAtIndexPath:[self.tableView indexPathForSelectedRow] animated:animated];
self.navigationController.navigationBar.barTintColor = twitter_blue;
self.navigationController.navigationBar.translucent = NO;
self.navigationController.navigationBar.tintColor = [UIColor whiteColor];
[self.navigationController.navigationBar setTitleTextAttributes:#{NSForegroundColorAttributeName : [UIColor whiteColor]}];
}
-(void)fetchDataFromCoreData
{
AppDelegate *del = [[AppDelegate alloc] init];
NSManagedObjectContext *context = del.managedObjectContext;
NSString *entity;
entity = [NSString stringWithFormat:#"Tweet"];
NSFetchRequest *fet = [NSFetchRequest fetchRequestWithEntityName:entity];
NSError *e;
NSArray *array = [context executeFetchRequest:fet error:&e];
self.arrayWithContent = [[NSArray alloc] initWithArray:array];
for (Tweet *t in self.arrayWithContent) {
NSLog(#"array %#", t.messageOfTweet);
}
}
-(void)switchViewControllers
{
PCRSavedTweetByUserTableViewController *vc = [[PCRSavedTweetByUserTableViewController alloc] init];
PCRNavigationBarController *navBarControllerOfSafeSide = [[PCRNavigationBarController alloc] initWithRootViewController:vc];
[self.navigationController presentViewController:navBarControllerOfSafeSide animated:YES completion:nil];
}
#pragma mark Status bar
- (void)willPresentSearchController:(UISearchController *)searchController {
// do something before the search controller is presented
self.navigationController.navigationBar.translucent = YES;
}
-(void)willDismissSearchController:(UISearchController *)searchController
{
self.navigationController.navigationBar.translucent = NO;
searchController = self.searchController;
}
-(void)updateSearchResultsForSearchController:(UISearchController *)searchController
{
searchController = self.searchController;
}
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar
{
self.search = #1;
[self.searchResults removeAllObjects];
NSString *searchBarString = self.searchController.searchBar.text;
for (Tweet *tweet in self.arrayWithContent){
if ([tweet.messageOfTweet containsString:searchBarString] || [tweet.userNameOfTweetUser containsString:searchBarString] || [tweet.whoPosted.name containsString:searchBarString]) {
[self.searchResults addObject:tweet];
}
}
[self.tableView reloadData];
}
- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar
{
[self.searchController.searchBar resignFirstResponder];
self.search = #0;
[self.tableView reloadData];
}
-(void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar
{
self.searchController.searchBar.text = #"";
}
#pragma mark Table
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection: (NSInteger)section
{
return [self.arrayWithContent count];
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 120.0f;
}
- (PCRTweetFeedCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
PCRTweetFeedCell *cell = [tableView dequeueReusableCellWithIdentifier:#"PCRSavedTweetFeedCell"];
PCRTweet *tweetLocal = [[PCRTweet alloc] init];
if (cell == nil) {
cell = [[PCRTweetFeedCell alloc] initWithTweet:tweetLocal reuseIdentifier:#"PCRSavedTweetFeedCell"];
}
Tweet *tweetForIndex;
NSArray *arrayForCell = [[self.arrayWithContent reverseObjectEnumerator] allObjects];
NSArray *searchArrayForCell = [[self.searchResults reverseObjectEnumerator] allObjects];
if ([self.search isEqual:#0]){
tweetForIndex = [arrayForCell objectAtIndex:indexPath.row];
} else if ([self.search isEqual:#1]){
tweetForIndex = [searchArrayForCell objectAtIndex:indexPath.row];
}
NSString *date = [NSString stringWithFormat:#"%#", tweetForIndex.dateOfTweet];
TweetUser *tweetUser = tweetForIndex.whoPosted;
cell.t = tweetForIndex;
UIImage *imageOfTweetUser;
if (tweetUser.profilePicture) {
imageOfTweetUser = [UIImage imageWithData:tweetUser.profilePicture];
} else {
NSURL *urlWithProfilePicture = [NSURL URLWithString:tweetUser.profilePictureURL];
NSData *dataWithPic = [NSData dataWithContentsOfURL:urlWithProfilePicture];
imageOfTweetUser = [UIImage imageWithData:dataWithPic];
}
self.imageOfTweetUserGlobal = imageOfTweetUser;
cell.tweetMessage.text = tweetForIndex.messageOfTweet;
cell.tweetDate.text = date;
cell.tweetUserNameLabel.text = tweetForIndex.userNameOfTweetUser;
cell.profilePictureOfTwitterUserImageView.image = imageOfTweetUser;
cell.nameForPassing = [NSString stringWithFormat:#"%#'s Tweet", tweetUser.name];
return cell;
}

Answer 1

Well maybe this is your problem.
if ([self.search isEqual:#0]){
I think you are initially fetching the data but than once you init the searchController it starts looking for the searchResults.
The code you are looking is:
if ([self.search isActive]){

Answer 2

I found the solution. I changed
AppDelegate *del = [[AppDelegate alloc] init];
NSManagedObjectContext *context = del.managedObjectContext;
to
AppDelegate *del = [[UIApplication sharedApplication] delegate];
NSManagedObjectContext *context =[del managedObjectContext];
and it works perfectly.