detecting the change of content of UITextField when the change is not made by the keyboard

Question

I have a UIButton and a UITextField,when the button is pressed the textfield\'s content string will be equal to: This is a test string

Answer 1

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
     //You code here...
}

Did u try this?