Show/hide keyboard

gistfile1.txt

    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.35];
    
    if (self.isFlipped) {
        [self.textView resignFirstResponder];
        self.keyboard.transform = CGAffineTransformMakeRotation(0);
        self.showHideButton.transform = CGAffineTransformMakeRotation(0);
    } else {
        [self.textView becomeFirstResponder];
        self.keyboard.transform = CGAffineTransformMakeRotation(M_PI);
        self.showHideButton.transform = CGAffineTransformMakeRotation(M_PI);
    }
    TOGGLE(self.isFlipped);
    
    [UIView commitAnimations];