NSSortDescriptor doesn't update UITableView - ios

Question

I'm trying to sort my tableview using NSSortDescriptor in a UISegmentedControl. When I log the Array to sort it shows the correct sorting order, but the tableview doesn't update after calling [self.tableView reloadData];
The data comes from an array which is populated by a json feed. I'm not using NSObjects to display the tableview, it's all populated from the NSArray. See code below:
#interface LinksTableViewController (){
NSArray *data;
}
#property (strong, nonatomic) NSArray *links;
#property (strong, nonatomic) NSArray *tNames;
#property (strong, nonatomic) NSArray *dThor;
#property (strong, nonatomic) NSArray *theLinker;
#property (strong, nonatomic) NSArray *anText;
#property (strong, nonatomic) NSArray *noDo;
#end
#implementation LinksTableViewController
- (void)viewDidLoad {
[super viewDidLoad];
UISegmentedControl *statFilter = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:#"STAT1", #"STAT2", #"STAT3", #"STAT4", nil]];
[statFilter sizeToFit];
[statFilter addTarget:self action:#selector(MySegmentControlAction:) forControlEvents: UIControlEventValueChanged];
self.navigationItem.titleView = statFilter;
[NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:#selector(refreshdelay:) userInfo:nil repeats:NO];
}
- (void)MySegmentControlAction:(UISegmentedControl *)segment
{
NSArray *arrayToSort = data;
if (segment.selectedSegmentIndex == 0)
{
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:#"pda" ascending:NO];
arrayToSort = [arrayToSort sortedArrayUsingDescriptors:#[sortDescriptor]];
NSLog(#"%#", arrayToSort);
}
else if (segment.selectedSegmentIndex == 1)
{
}
else if (segment.selectedSegmentIndex == 2)
{
}
else if (segment.selectedSegmentIndex == 3)
{
}
[self.tableView reloadData];
}
-(void)refreshdelay:(NSTimer*)timer
{
NSString *myString = [links absoluteString];
NSURL *JSONData = [NSURL URLWithString:myString];
NSData *datas = [NSData dataWithContentsOfURL:JSONData];
NSURLRequest *request = [NSURLRequest requestWithURL:JSONData];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
operation.responseSerializer = [AFJSONResponseSerializer serializer];
operation.responseSerializer.acceptableContentTypes = [operation.responseSerializer.acceptableContentTypes setByAddingObject:#"text/html"];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
NSArray *jsonResult = [NSJSONSerialization JSONObjectWithData:datas options:kNilOptions error:nil];
data = jsonResult;
NSMutableArray *names = [NSMutableArray array];
NSMutableArray *bLinks = [NSMutableArray array];
NSMutableArray *daThor = [NSMutableArray array];
NSMutableArray *bsLink = [NSMutableArray array];
NSMutableArray *ancTxt = [NSMutableArray array];
NSMutableArray *folLowd = [NSMutableArray array];
for (id itemfeed in jsonResult){
[names addObject:[NSString stringWithFormat:#"%#", itemfeed[#"ut"]]];
[bsLink addObject:[NSString stringWithFormat:#"%#", itemfeed[#"uu"]]];
[bLinks addObject:[NSString stringWithFormat:#"%#", itemfeed[#"upa"]]];
[daThor addObject:[NSString stringWithFormat:#"%#", itemfeed[#"pda"]]];
[ancTxt addObject:[NSString stringWithFormat:#"%#", itemfeed[#"lt"]]];
[folLowd addObject:[NSString stringWithFormat:#"%#", itemfeed[#"lf"]]];
self.links = names;
self.tNames = bLinks;
self.dThor = daThor;
self.theLinker = bsLink;
self.anText = ancTxt;
self.noDo = folLowd;
}
[self.tableView reloadData];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
}];
[operation start];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
// UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"Cell" forIndexPath:indexPath];
static NSString *Cellidentifier = #"DataTableCellId";
LICustomCell *cell = (LICustomCell *) [tableView dequeueReusableCellWithIdentifier:Cellidentifier];
if (cell == nil) {
cell = [[LICustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:Cellidentifier];
NSArray *nib = [[NSBundle mainBundle]loadNibNamed:#"LiCellView" owner:self options:nil];
cell = nib[0];
NSString *sLink = self.links[indexPath.row];
NSString *aLink = self.tNames[indexPath.row];
NSString *aDa = self.dThor[indexPath.row];
NSString *theInk = self.theLinker[indexPath.row];
NSString *thAnk = self.anText[indexPath.row];
NSString *fLink = self.noDo[indexPath.row];
cell.ageLable.text = theInk;
}
return cell;
}

Answer 1

Looks like the data for your tableView is in 6 different arrays.
NSString *sLink = self.links[indexPath.row];
NSString *aLink = self.tNames[indexPath.row];
NSString *aDa = self.dThor[indexPath.row];
NSString *theInk = self.theLinker[indexPath.row];
NSString *thAnk = self.anText[indexPath.row];
NSString *fLink = self.noDo[indexPath.row];
Shouldn't you be sorting all of them? As your code stands now it's not clear how arrayToSort is connected to the data model of your tableView. You have NSArray *arrayToSort = data;, but it's not clear where data is initialized or where it's set (seems like you would want to set that in your JSON competition block). You also need to call [self.tableView reloadData]; at the end of MySegmentControlAction.
You can create a subclass of NSObject that has 6 NSString properties call it something like MyObject (but more descriptive). Then do something like:
for (id itemfeed in jsonResult){
MyObject *object = [[MyObject alloc]init];
object.sLink = [NSString stringWithFormat:#"%#", itemfeed[#"ut"]];
object.aLink = [NSString stringWithFormat:#"%#", itemfeed[#"uu"]];
...
[self.data addObject:object];
}
In the JSON competition block.
You then change cellForRowAtIndexPath to include something like
MyObject *object = [self.data objectAtIndex:indexPath.row]
cell.ageLable.text = object.theInk;
If you go this route you also need to update:
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:#"pda" ascending:NO];
specifically #"pda" to whatever you name the property in your NSObject subclass. #"dThor" if you follow the naming I used.