Tableview is not showing cells in the time i posted - ios

Question

I have created a app that fetches information from a blog and shows it in the app. After i fetch the data it is supposed to be shown on the table view. It shows the things that i have posted but the things are in alphabetical order rather than the time i posted the thing.
Here is the code
#implementation EventsTableViewController
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.firstLettersArray = [NSMutableArray array];
self.eventsDictionary = [NSMutableDictionary dictionary];
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self searchForEvents];
}
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar
{
[self searchForEvents];
}
- (void)searchForEvents
{
[self.searchBar resignFirstResponder];
NSString *eventsSearchUrlString = [NSString stringWithFormat:#"https://www.googleapis.com/blogger/v3/blogs/1562818803553764290/posts?key=AIzaSyBTOxz-vPHgzIkw9k88hDKd99ILTaXTt0Y"];
NSURL *eventsSearchUrl = [NSURL URLWithString:eventsSearchUrlString];
NSURLRequest *eventsSearchUrlRequest = [NSURLRequest requestWithURL:eventsSearchUrl];
NSURLSession *sharedUrlSession = [NSURLSession sharedSession];
NSURLSessionDataTask *searchEventsTask =
[sharedUrlSession dataTaskWithRequest:eventsSearchUrlRequest completionHandler:
^(NSData *data, NSURLResponse *response, NSError *error)
{
dispatch_async(dispatch_get_main_queue(),
^{
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
if(error)
{
UIAlertView *searchAlertView = [[UIAlertView alloc] initWithTitle:#"Error" message:error.localizedDescription delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[searchAlertView show];
}
else
{
NSString *resultString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(#"Search results: %#", resultString);
NSError *jsonParseError = nil;
NSDictionary *jsonDictionary = [NSJSONSerialization JSONObjectWithData:data options:0 error:&jsonParseError];
if(jsonParseError)
{
UIAlertView *jsonParseErrorAlert = [[UIAlertView alloc] initWithTitle:#"Error" message:jsonParseError.localizedDescription delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[jsonParseErrorAlert show];
}
else
{
for(NSString *key in jsonDictionary.keyEnumerator)
{
NSLog(#"First level key: %#", key);
}
[self.firstLettersArray removeAllObjects];
[self.eventsDictionary removeAllObjects];
NSArray *searchResultsArray = [jsonDictionary objectForKey:#"items"];
//NSLog(#"test%#",searchResultsArray);
for(NSDictionary *eventsInfoDictionary in searchResultsArray)
{
Events *event = [[Events alloc] init];
event.eventName = [eventsInfoDictionary objectForKey:#"title"];
event.eventDescription =[eventsInfoDictionary objectForKey:#"content"];
NSLog(#"Event Name : %#",event.eventName);
NSLog(#"Event Description : %#",event.eventDescription);
NSString *eventsFirstLetter = [event.eventName substringToIndex:1];
NSMutableArray *eventsWithFirstLetter = [self.eventsDictionary objectForKey:eventsFirstLetter];
if(!eventsWithFirstLetter)
{
eventsWithFirstLetter = [NSMutableArray array];
[self.firstLettersArray addObject:eventsFirstLetter];
}
[eventsWithFirstLetter addObject:event];
[self.eventsDictionary setObject:eventsWithFirstLetter forKey:eventsFirstLetter];
if ([event.eventDescription containsString:#"<br />"]) {
NSString* eventDescrip = event.eventDescription;
NSString* stringWithoutHTMLtags = [eventDescrip stringByReplacingOccurrencesOfString:#"<br />" withString:#""];
event.eventDescription = stringWithoutHTMLtags;
}
NSLog(#"Event Name : %#",event.eventName);
NSLog(#"Event Description : %#",event.eventDescription);
}
[self.firstLettersArray sortUsingSelector:#selector(compare:)];
[self.tableView reloadData];
}
}
});
}];
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
[searchEventsTask resume];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return self.firstLettersArray.count;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSString *firstLetter = [self.firstLettersArray objectAtIndex:section];
NSArray *eventsWithFirstLetter = [self.eventsDictionary objectForKey:firstLetter];
return eventsWithFirstLetter.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"eventTitleCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
NSString *firstLetter = [self.firstLettersArray objectAtIndex:indexPath.section];
NSArray *eventsWithFirstLetter = [self.eventsDictionary objectForKey:firstLetter];
Events *event = [eventsWithFirstLetter objectAtIndex:indexPath.row];
cell.textLabel.text = event.eventName;
return cell;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
/*
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
NSString *cellText = cell.textLabel.text;
NSLog(#"Row selected %#",cellText);*/
NSString *firstLetter = [self.firstLettersArray objectAtIndex:indexPath.section];
NSArray *eventsWithFirstLetter = [self.eventsDictionary objectForKey:firstLetter];
Events *event = [eventsWithFirstLetter objectAtIndex:indexPath.row];
UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:#"Main" bundle: nil];
DescriptionViewController *descriptionViewController = (DescriptionViewController*)[mainStoryboard instantiateViewControllerWithIdentifier: #"descriptionController"];
descriptionViewController.eventNameDesc = event.eventDescription;
descriptionViewController.navigationItem.title = event.eventName;
[self.navigationController pushViewController:descriptionViewController animated:YES];
}
#end

Answer 1

You are trying to sort firstLettersArray which contain Events objects by using standard sort: function which doesn't know how to work with your custom objects.
You can use sortedArrayUsingComparator: function like this:
[firstLettersArray sortedArrayUsingComparator:^NSComparisonResult(Events *obj1, Events *obj2) {
// return object comparison result here
}];
Edit: Also you need to have NSDate property in Events class and feel it with event created time. I believe event created time should be contained in eventsInfoDictionary. Eventually you will be able to compare obj1 and obj2 using NSDate property.

Answer 2

i think this line not working
[self.firstLettersArray sortUsingSelector:#selector(compare:)];
use this line of code may help you....
sortedArray = [anArray sortedArrayUsingSelector:#selector(localizedCaseInsensitiveCompare:)];