Fix maximum character limit in text field

Question

How can a fixed character limit be imposed on a text field in Cocos2d?

Answer 1

To fix the maximum number of characters in a UITextField, you could do implement the UITextField Delegate Method textField:shouldChangeCharactersInRange to return false if the user tries to edit the string past the fixed length.

//Assume myTextField is a UITextField
myTextField.delegate = self;

//implement this UITextFiledDelegate Protocol method in the same class
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
    if ([textField.text length] > kMaxTextFieldStringLength)
        return NO;
    else
        return YES; 
}