how to remove a view? - iphone

Question

I have an iphone application in which i am adding a view controllers view with an animation like flipfrom left.I was doing it with navigationbarbutton item.when clicking on it i was adding a view controllers view to my rootview.and changing the button amd in that action i am removing that view and adding the previous button like that.but the pbm i need to remove that info view with in a button action inside that view.here is my code for the flipanimation.`
- (void)backPressed1
{
InfoViewController *infoviewcontroller = [[InfoViewController alloc] initWithNibName:#"InfoViewController" bundle:nil];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:.95];
//[UIView beginAnimations:nil context:NULL];
//[UIView setAnimationDuration:0.5];
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:self.view cache:YES];
//CGRect frame=CGRectMake(0,0,320,480);
[rootview removeFromSuperview];
//[infoviewcontroller.view setFrame:frame];
//selfhelpscoresAppDelegate *appdelegate=[[UIApplication sharedApplication] delegate];
[infoviewcontroller viewWillAppear:YES];
[self.view addSubview:infoviewcontroller.view];
[UIView commitAnimations];
UIImage *buttonImage = [UIImage imageNamed:#"information_btn.png"];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:buttonImage forState:UIControlStateNormal];
button.frame = CGRectMake(0, 0, 42, 32);
[button addTarget:self action:#selector(backpressed) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *customBarItem = [[UIBarButtonItem alloc] initWithCustomView:button];
self.navigationItem.rightBarButtonItem = customBarItem;
//UILabel *label =[[[UILabel alloc]init]autorelease];
self.navigationItem.title=#"Tutorial";
//label.text = #"";
//self.navigationController.title = #"";
[customBarItem release];
}
-(IBAction)backpressed
{
InfoViewController *infoviewcontroller = [[InfoViewController alloc] initWithNibName:#"InfoViewController" bundle:nil];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:.95];
//[UIView beginAnimations:nil context:NULL];
//DailypercentageViewController *pieChart = [[DailypercentageViewController alloc] initWithNibName:#"DailypercentageViewController" bundle:nil];
//[UIView setAnimationDuration:0.5];
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:self.view cache:YES];
//CGRect frame=CGRectMake(0,0,320,370);
[infoviewcontroller.view removeFromSuperview];
[self.view addSubview:rootview];
[UIView commitAnimations];
//[rearView setFrame:frame];
//[pieChart viewDidAppear:YES];
UIImage *buttonImage1 = [UIImage imageNamed:#"information_btn.png"];
UIButton *button1 = [UIButton buttonWithType:UIButtonTypeCustom];
[button1 setImage:buttonImage1 forState:UIControlStateNormal];
button1.frame = CGRectMake(0, 0, 42, 32);
[button1 addTarget:self action:#selector(backPressed1) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *customBarItem1 = [[UIBarButtonItem alloc] initWithCustomView:button1];
self.navigationItem.rightBarButtonItem = customBarItem1;
[customBarItem1 release];
//UILabel *label1 =[[[UILabel alloc]init]autorelease];
self.navigationItem.title=#"";
//label1.text = #"Home";
//self.title= #"Home";
}
`my problem is how i can remove this infoview and came back to the rootview from with in the button action from the infoview?