Why does this only work sometimes? (UITextView resign first responder question)

Question

When a user presses the "SEND"(return) button I want the keyboard to retract and do other stuff like send a message. But it only works SOMETIMES...

Why does this code only work SOMETIMES? I need it to work all the time obviously, but it doesn't.

- (void)textViewDidChange:(UITextView *)inTextView {

    NSString *text = myTextView.text;

    if ([text length] > 0 && [text characterAtIndex:[text length] -1] == '\n') {
        myTextView.text = [text substringToIndex:[text length] -1];
        [myTextView resignFirstResponder];
        [self sendMessage];

    }
}

Answer 1

It only gets called if

([text length] > 0 && [text characterAtIndex:[text length] -1] == '\n')

is true. Is this always the case? Maybe add an NSLog statement outside and inside the state to see if it is indeed true all of the time.

Answer 2

Checking for \n looks bizarre. Why would you do that?