how to add minimum text in textfield

Question

I have three types of text fields. in that I need only minimum numbers only . below code I write-in but its not working. help me

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{ 
    if (country.text.length <= 4) {
        return YES;
    }

    if(code.text.length<=4 ) {
        return YES;
    }

    if(textPhone.text.length<=10) {
        return YES;
    }

    return YES;
}

Answer 1

Your logic is flawed here. You don't even base your checks on which field is edited.

Try this:

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

    // Allow backspace anyway
    if (range.length == 0)
        return YES;

    if (textField == country)
        return (country.text.length <= 4);

    else if (textField == code)
        return (code.text.length <= 4);

    else if (textField == textPhone)
        return (textPhone.text.length <= 10);

    // Default for all other fields
    return YES;
}