How to limit the characters of textfield in iOS application up to 5 characters?

Question

I would like to limit the characters in textField of IOS Application. I tried all the methods given in Stack Overflow, so I am asking this question.

Here I used one Label (secure code) and one textfield (5 characters).

I had given the below code in viewcontroller.m file, but not working.

   myTextField.delegate = self

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

{
   NSString *newString = [textField.text stringByReplacingCharactersInRange:range withString:string];

   return !([newString length] > 5);
}

Answer 1

In ViewController.h, <UITextFieldDelegate> should be added.

In your viewDidLoad, myTextField.delegate = self should be added.

And then, to limit the number of characters:

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range     replacementString:(NSString *)string
{
     if (textField.text.length >= 5 && range.length == 0)
        return NO;
     return YES;
}

Works for me. Try it.

EDIT:

On the other hand, your code should work perfectly fine as well. Check your code again.