ios filter records using nsmutablearray filled with NSDictionary<FBGraphUser>* friend

Question

I want to filter my friends list names. I had all friends list in NSMutable array using this method i had list .

FBRequest* friendsRequest = [FBRequest requestForMyFriends];

    [friendsRequest startWithCompletionHandler: ^(FBRequestConnection *connection,
                                                  NSDictionary* result,
                                                  NSError *error) {
        friendList = [[NSMutableArray alloc]initWithArray:[result objectForKey:@"data"]];
        selectedfriendList =[[NSMutableArray alloc]init];
        [Tablefriendlist reloadData];
    }];

I want to filter records through textfield but problem I dont know how to use nspredicatewithformat

I am trying this.. and its not filtering correct searched data.

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self.first_name contains[c] %@",searchText];
        friendList = [NSMutableArray arrayWithArray:[friendList filteredArrayUsingPredicate:predicate]];
        NSLog(@"friendlist %@",friendList);
        [Tablefriendlist reloadData];

I want to get friendslist that match searchtext

problem is its fetching record but those record which contains searched characters only those. eg i searched sa

so it fetches records that contain character 's' and character 'a' i want to seach records with sa eg ::

when 'sa' is searched these records should be fetched
1:falsa
2:telsa
3:salad

what is happening in my code is this
1:falsa
2:telsa
3:yalst
4:salad

Answer 1

Try this

change predicate

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self.first_name contains[c] %@",searchText];

to

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"first_name contains[c] %@",searchText];