NSDictionary to TableView

Question

because i'm a newby at Stackoverflow i cannot comment someones anwser yet. (my reputation is 16..). I got a question about this anwser: How do I put this JSON data into my table view? Please help me, I'm living in a nightmare :)

Fulvio sais you have to use [eventNameList addObject:event]; and [eventNameList objectAtIndex:indexPath.row]; to store and get the event data but. addObject is an NSMutableSet method and objectAtIndex:indexPath.row is not. So i cannot use this method to get the data from the NSMutableSet.

Besides that, i can use the count methods neither.

Any Idea's ?

Answer 1

Assuming you have an NSDictionary, you could use the [dictionary allKeys] method to retrieve an array with all keys (lets call it keyArray for now). For the rowCount you could return the count of objects in this keyArray. To get the item that needs to be displayed in the cell you could use [dictionary objectForKey:[keyArray objectAtIndex:indexPath.row]]] to get the appropriate dictionary for the displayed cell.

In code:

// use the keyArray as a datasource ...
NSArray *keyArray = [jsonDictionary allKeys];

// ------------------------- //

// somewhere else in your code ...
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
   return [keyArray count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
   static NSString *CellIdentifier = @"Cell";

   UITableViewCell *cell = (UITableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
   if (cell == nil) {
      cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
      // set some cell defaults here (mainly design) ...
   }

   NSString *key = [keyArray objectAtIndex:indexPath.row];
   NSDictionary *dictionary = [jsonDictionary objectForKey:key];
   // get values from the dictionary and set the values for the displayed cell ...

   return cell;
}

---

@Tieme: apparantly the URL you use already returns an array, you don't really need to process a dictionary (you could just use the array as the dataSource), check out the following:

SBJSON *json = [[[SBJSON alloc] init] autorelease];
NSURL *url = [NSURL URLWithString:@"http://www.my-bjoeks.nl/competitions/fetchRoutes/25.json"];
NSString *string = [[[NSString alloc] initWithContentsOfURL:url] autorelease];
NSError *jsonError = nil;
id object = [json objectWithString:string error:&jsonError];
if (!jsonError) {
   NSLog(@"%@", object);
   NSLog(@"%@", [object class]); // seems an array is returned, NOT a dictionary ...
}

// if you need a mutableArray for the tableView, you can convert it.
NSMutableArray *dataArray = [NSMutableArray arrayWithArray:object]