UITextField - Crash on delegates that return BOOL

Question

I have a UITextField that I am adding to UITableViewCellfor use as a search field for a long list of accounts. I added it as follows:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{
    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];
    }

    if ((indexPath.section < accountsection) && (hasSearch) && (indexPath.row == 0)) 
    {
        // Search
        if (!searchField) 
        {
            searchField = [[UITextField alloc] initWithFrame:CGRectMake(20, 10, cell.frame.size.width - 40, 25)];
            [searchField setEnabled:YES];
            searchField.placeholder = NSLocalizedString(@"Search", @"search");
            searchField.keyboardType = UIKeyboardTypeDefault;
            searchField.returnKeyType = UIReturnKeySearch;
            searchField.autocorrectionType = UITextAutocorrectionTypeNo;
            searchField.clearButtonMode = UITextFieldViewModeAlways;
            searchField.delegate = self;
            [cell addSubview:searchField];
            [searchField release];
        }

        // Clean up an account label if needed
        cell.accessoryType = UITableViewCellAccessoryNone;
        cell.textLabel.text = @"";
        cell.detailTextLabel.text = @"";

        // Show the search field if it was hidden by a text label
        searchField.hidden = NO;
        [cell bringSubviewToFront:searchField];
    } 
}

To detect changes in the text box, I configured UITextFieldDelegatein the header and caught the following delegate calls:

@interface AccountViewController : UITableViewController <UITextFieldDelegate> {
    BOOL hasSearch;    
    UITextField *searchField;
...
}

In the implementation, I process these delegate methods:

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    NSLog(@"Done editing");
    [self filterAccountsBy:textField.text];
    [textField resignFirstResponder];
    return NO;
}

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
    NSLog(@"Searching for %@", string);
    [self filterAccountsBy:string];    
    return YES;
}

However, in the second case, if I do not return YES, the text will never change; in the first, returning YES doesn't seem to affect me. But when I return YES anyway, I get nasty EXC_BAD_ACCESS.

I need to skip something in my manual by adding this UITextField to my cell, but I can't figure out what it is ... can anyone help?

Many thanks.

---

: , filterAccounts, . :

- (void)filterAccountsBy:(NSString *)filterstring 
{
    [accounts removeAllObjects];
    if (([filterstring length] == 0) && (!isChooser) && (![vpmsConn isDomainLogon])) {
        [accounts addObject:[[vpmsConn accounts] objectAtIndex:0]];
    } 

    if ([filterstring length] == 0) {
        [accounts addObjectsFromArray:[cache accounts]];
    } else {
        for (AccountItem *ac in [cache accounts]) 
        {           
            BOOL found = NO;

            // Name search
            if ([[ac.clientName uppercaseString] rangeOfString:[filterstring uppercaseString]].location != NSNotFound) {
                found = YES;
            }

            //more similar searches

            if (found) {
                [accounts addObject:ac];
            }
        }   
    }

    [self.tableView reloadData];
}

. , textFieldShouldReturn, NO, . - YES , . , YES .

, , .

Answer 1

, (- NDA) . , , iOS, NDA UITextField EXC_BAD_ACCESS, ...

Answer 2

, UITextField searchfield . self.searchField, searchfield ( , ), .

, .h. :

@property (nonatomic, retain) UITextField *searchField;

.m:

@synthesize searchField;

, , . , .

Answer 3

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

return cell;

?

Answer 4

- (UITableViewCell *) tableView: (UITableView *) tableView cellForRowAtIndexPath: (NSIndexPath *) indexPath return cell;

serachfield ;

Release at dealloc

add @property (non-atomic, save) UITextField * searchField;