Xcode使用textField shouldChangeCharactersInRange：导致应用崩溃

Question

I'm trying to implement an autocomplete funktion under a textfield, using a script i found here:

http://www.raywenderlich.com/336/how-to-auto-complete-with-custom-values

But it runs the script as it should, and then the app crashes without giving me a reson (just exc_bad_access in the TUAppDelegate)

No i have a few other keyboard methos, so don't know if they conflict.

The textfield is declared like this:

mytextfield_textfield = [[UITextField alloc] initWithFrame:CGRectMake(60, 57, 145, 20)];
mytextfield_textfield.borderStyle = UITextBorderStyleNone;
mytextfield_textfield.font =  [UIFont fontWithName:@"NeoSans" size:14];
mytextfield_textfield.placeholder = @"Enter something";
mytextfield_textfield.text = @"";
mytextfield_textfield.secureTextEntry = NO;
mytextfield_textfield.autocapitalizationType = UITextAutocapitalizationTypeNone;
mytextfield_textfield.autocorrectionType = UITextAutocorrectionTypeNo;
mytextfield_textfield.keyboardType = UIKeyboardTypeDefault;
mytextfield_textfield.returnKeyType = UIReturnKeyDone;
mytextfield_textfield.clearButtonMode = UITextFieldViewModeWhileEditing;
mytextfield_textfield.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;    
mytextfield_textfield.delegate = self;
[self.view addSubview:mytextfield_textfield];

And then the autocompleteview underneath as a scrollview instead of tableview (another reason for that). But it isn't used right now.

Then i have these methods already:

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch * touch = [touches anyObject];
    if(touch.phase == UITouchPhaseBegan) {
        [mytextfield_textfield resignFirstResponder];
    }

    [mytextfield_textfield resignFirstResponder];
    myTableView.userInteractionEnabled = YES;
}

- (void)textFieldDidBeginEditing:(UITextField *)textField {
    myTableView.userInteractionEnabled = NO;
}

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    [mytextfield_textfield resignFirstResponder];
    myTableView.userInteractionEnabled = YES;
    [self performSelector:@selector(AddAction:) withObject:nil] ;
    return YES; 
}

And now i implement the autocomplete:

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
    autocompleteView.hidden = NO;
    NSString *substring = [NSString stringWithString:textField.text];
    substring = [substring stringByReplacingCharactersInRange:range withString:string];
    [self searchAutocompleteEntriesWithSubstring:substring];
    myTableView.userInteractionEnabled = YES;
    NSLog(@"ok") ;
    return NO;
}

- (void)searchAutocompleteEntriesWithSubstring:(NSString *)substring {
    NSDictionary *dictionary = [[NSDictionary alloc] init ];
    NSString *path = [[NSBundle mainBundle] bundlePath] ;
    NSString *dictionary_path = [path stringByAppendingPathComponent:@"categorieslist2.plist"] ;
    dictionary = [NSDictionary dictionaryWithContentsOfFile:dictionary_path] ;

    for(id key in dictionary) {
        NSLog(@"%@",key) ;
    }
    [dictionary release] ;
}

It output's the keys and returns the OK from the NSlog, but then it crashes. Any idea why?

I'm just doing the NSLog only, because i'm trying to figure out why it isnt working

Answer 1

change

   - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {

return YES;
}

Answer 2

For reason i have no idea of, the [dictionary release] was the culprit. Anybody can explain why? The same thing gave me a crash in another section of the app where i also released a dictionary read from a plist. commenting it out solved everything, even though i don't use the dictionary after the for loop