How control Copy, Paste, Select All, Define in UITextView iPhone app?

I am working in the iPhone app using UITextView. I want to allow the user only can Copy the message and Paste the message. But i don't want to show Select all, Select, Define and others. I am following this below code to control the options. But, all the options are showing in UITextView click.

- (BOOL)canPerformAction:(SEL)action withSender:(id)sender
{
    if (action == @selector(paste:))
    {
        return NO;
    }
    else if (action == @selector(copy:))
    {
        return NO;
    }

    return [super canPerformAction:action withSender:sender];
}

Can anyone please help me to do this. And also i don't want to show |.Text.| while copying the message. Please help me to do this. Thanks in advance.