Table view and Predicates - iphone

Question

I have a table view with 40 objects. I have to filter them by gender when Click in a UISegment (male, female and both). It seems to be working, but table view does not refresh. Please any help would be appreciatte.
-(void)viewDidLoad
{
[super viewDidLoad];
self.navigationItem.title = #"People";
[self loadall];
[[NSBundle mainBundle] loadNibNamed:#"FilterSortView" owner:self options:nil];
self.filterControl.selectedSegmentIndex = -1;
[self.filterControl addTarget:self action:#selector( changeSegge ) forControlEvents:UIControlEventValueChanged];
}
#
My second method to filter by gender
- (void)changeSegge
{
NSEntityDescription *personEntity = [NSEntityDescription entityForName:#"Person"
inManagedObjectContext:self.managedObjectContext];
NSFetchRequest *request = [[NSFetchRequest alloc] init];
[request setEntity:personEntity];
NSError *error = nil;
self.people = [self.managedObjectContext executeFetchRequest:request error:&error];
if (error)
{
[NSException raise:NSInternalInconsistencyException format:#"Could not fetch Core Data records: %#",error];
}
if(filterControl.selectedSegmentIndex == 0){
NSPredicate *predicatem =[NSPredicate predicateWithFormat:#"gender == %#", #"m" ];
request.predicate=predicatem;
[self.tableView reloadData];
[request release];
NSLog(#"button 1");
}
Thanks a lot.

Answer 1

You forgot to fill people array after predicate set to fetch request.
Here is updated changeSegge method:
- (void)changeSegge
{
NSEntityDescription *personEntity = [NSEntityDescription entityForName:#"Person"
inManagedObjectContext:self.managedObjectContext];
NSFetchRequest *request = [[NSFetchRequest alloc] init];
[request setEntity:personEntity];
NSError *error = nil;
self.people = [self.managedObjectContext executeFetchRequest:request error:&error];
if (error)
{
[NSException raise:NSInternalInconsistencyException format:#"Could not fetch Core Data >records: %#",error];
}
if(filterControl.selectedSegmentIndex == 0){
NSPredicate *predicatem =[NSPredicate predicateWithFormat:#"gender == %#", #"m" ];
request.predicate=predicatem;
self.people = [self.managedObjectContext executeFetchRequest:request error:&error];
[self.tableView reloadData];
[request release];
NSLog(#"button 1");
}