Search bar with NSPredicate doesn't work - ios

Question

I've made a view for editing friend, with a searchbar. My adding/deleting friends is working fine, but I've a problem with my adding/deleting friends WITH SEARCHBAR...
My searchbar finds well the email I'm tapping, but the order change :
if I find 2 email with my searchbar, the 2 email will are the 2 first email in my property "Allfriend", and not the email I found with searchbar...
Is there any code to complete in didSelectRowAtIndexPath after NSLog ?
I let you see my code, tell me if you see a problem :
editfriend.h :
#import <UIKit/UIKit.h>
#import <Parse/Parse.h>
#interface EditFriendsViewController : UITableViewController <UISearchBarDelegate, UISearchDisplayDelegate>
#property (nonatomic, strong) NSArray *allUsers;
#property (nonatomic, strong) PFUser *currentUser;
#property (nonatomic, strong) NSMutableArray *friends;
#property (strong, nonatomic) NSArray *searchResults;
#property (nonatomic, strong) PFUser *user;
#property (nonatomic, strong) NSMutableArray *filteredArray;
#property (nonatomic, strong) UIImage *MindleNav;
-(BOOL)isFriend:(PFUser*)user;
#end
editfriend.m :
#import "EditFriendsViewController.h"
#interface EditFriendsViewController ()
#end
#implementation EditFriendsViewController
- (void)viewDidLoad
{
[super viewDidLoad];
self.navigationItem.titleView = [[UIImageView alloc] initWithImage:self.MindleNav];
self.searchResults = [[NSArray alloc] init];
PFQuery *query = [PFUser query];
[query orderByAscending:#"email"];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (error) {
NSLog(#"Error: %# %#", error, [error userInfo]);
}
else {
self.allUsers = objects;
// self.user = [objects objectAtIndex:0];
[self.tableView performSelectorOnMainThread:#selector(reloadData) withObject:nil waitUntilDone:NO];
}
}];
self.currentUser = [PFUser currentUser];
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
if (tableView == self.searchDisplayController.searchResultsTableView)
{
return [self.searchResults count];
}
else
{
return [self.allUsers count];
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
PFUser *user = [self.allUsers objectAtIndex:indexPath.row];
if (tableView == self.searchDisplayController.searchResultsTableView) {
cell.textLabel.text = [[self.searchResults objectAtIndex:indexPath.row] email];
} else {
cell.textLabel.text = user.email;
}
if ([self isFriend:user]) {
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
else {
cell.accessoryType = UITableViewCellAccessoryNone;
}
return cell;
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[self.tableView deselectRowAtIndexPath:indexPath animated:NO];
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
PFRelation *friendsRelation = [self.currentUser relationforKey:#"friendsRelation"];
PFUser *user = [self.allUsers objectAtIndex:indexPath.row];
if (tableView == self.searchDisplayController.searchResultsTableView) {
NSLog(#"CLICK search");
cell.accessoryType = UITableViewCellAccessoryNone;
} else {
NSLog(#"CLICK");
}
if ([self isFriend:user]) {
cell.accessoryType = UITableViewCellAccessoryNone;
for(PFUser *friend in self.friends) {
if ([friend.objectId isEqualToString:user.objectId]) {
[self.friends removeObject:friend];
break;
}
}
[friendsRelation removeObject:user];
}
else {
cell.accessoryType = UITableViewCellAccessoryCheckmark;
[self.friends addObject:user];
[friendsRelation addObject:user];
}
[self.currentUser saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
if (error) {
NSLog(#"Error: %# %#", error, [error userInfo]);
}
}];
}
#pragma mark - Helper methods
- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
{
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"email beginswith[c] %#", searchText];
self.searchResults = [self.allUsers filteredArrayUsingPredicate:predicate];
}
-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
[self filterContentForSearchText:searchString
scope:[[self.searchDisplayController.searchBar scopeButtonTitles]
objectAtIndex:[self.searchDisplayController.searchBar
selectedScopeButtonIndex]]];
return YES;
}
- (BOOL)isFriend:(PFUser *)user {
for(PFUser *friend in self.friends) {
if ([friend.objectId isEqualToString:user.objectId]) {
return YES;
}
}
return NO;
}
#end

Answer 1

Your array (probably) contains PFUser objects and the predicate is:
[NSPredicate predicateWithFormat:#"SELF beginswith[c] %#", searchText]
BEGINSWITH works only for strings and you try to apply it to PFUser objects. This is a reason of the crash. If you want to search for users whose names begin with the searchText, change the predicate to:
[NSPredicate predicateWithFormat:#"username beginswith[c] %#", searchText]