Question

I have create an array containing person firstname,lastname and number which i populate in tableview. Now i want to show only those person data whose lastname is equal to “Ahmed” This might be a simple question but i am not able to do it.Any help will be appreciated. Here is my code.

- (void)viewDidLoad {
    [super viewDidLoad];
    productArray=[[NSMutableArray alloc]init];

    PersonDetail *personObj = [[PersonDetail alloc] init];
    personObj.firstName = @"Adeem";
    personObj.lastName = @"Basraa";
    personObj.phoneNumber = @"123456789";

    [productArray addObject:personObj];
    [personObj release];

    PersonDetail *personObj = [[PersonDetail alloc] init];
    personObj.firstName = @"Ijaz";
    personObj.lastName = @"Ahmed";
    personObj.phoneNumber = @"987654321";

    [productArray addObject:personObj];
    [personObj release];

    PersonDetail *personObj = [[PersonDetail alloc] init];
    personObj.firstName = @"Waqas";
    personObj.lastName = @"Ahmad";
    personObj.phoneNumber = @"45656789";
    [productArray addObject:personObj];
    [personObj release];
}

Answer 1

You could use
- (NSArray *)filteredArrayUsingPredicate:(NSPredicate *)predicate on your array to retrieve a new filtered array.

To create a predicate use: (NSPredicate *)predicateWithFormat:(NSString *)format, ....

E.g.:

NSString* searchName = @"Ahmad";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"lastName == '%@'", searchName];
NSArray* filteredPersons = [productArray filteredArrayUsingPredicate:predicate];