Problems switching views iOS & xcode

Hi guys,

I am having troubles with transitioning between two views.
I have created a button to call switchViews. But, when I press the button the view turns white.

The view(s) creation is as follows;

Code:

    // Create main window and root view controller
    self.mainWindow=[[UIWindow alloc]initWithFrame:[[UIScreen mainScreen]bounds]];
    self.mainWindow.backgroundColor=[UIColor whiteColor];
    self.rootViewController=[[ViewController alloc] init];
    self.mainWindow.rootViewController=self.rootViewController;
    [self.mainWindow makeKeyAndVisible];
    
    // Create child view controllers
    self.firstViewController=[[ViewController alloc] init];
    [self.rootViewController addChildViewController:self.firstViewController];

    self.secondViewController=[[ViewController alloc] init];
    [self.rootViewController addChildViewController:self.secondViewController];
    
    // Get screen boundaries
    CGRect screenBound = [[UIScreen mainScreen] bounds];
    CGSize screenSize = screenBound.size;
    CGRect bounds=self.mainWindow.bounds;
    
    // Create view1 and assign to firstViewController
    view1=[[UIView alloc]initWithFrame: bounds];
    [view1 setBackgroundColor:[UIColor yellowColor]];
    [self.mainWindow addSubview:view1];
    self.firstViewController.view=view1;

    // Create view2 and assign to secondViewController
    view2=[[UIView alloc]initWithFrame: bounds];//CGRectMake(100,100,100,100)];
    [view2 setBackgroundColor:[UIColor redColor]];
    self.secondViewController.view=view2;
    
    // Button to switch from view1 to view2
    UIButton* OurButton=[UIButton buttonWithType:UIButtonTypeRoundedRect];
    [OurButton setTitle:@"Switch to 'View 2'" forState:UIControlStateNormal];
    [OurButton setTitleShadowColor:[UIColor colorWithRed:1.0f green:0.0f blue:0.0f alpha:1.0f] forState:UIControlStateNormal];
    [OurButton setTitleColor:[UIColor colorWithRed:0.0f green:0.0f blue:0.0f alpha:1.0f] forState:UIControlStateNormal];
    [OurButton setFrame:CGRectMake(22,screenSize.height-(44*2),screenSize.width-44,44)];       
    [view1 addSubview:OurButton];
    [OurButton addTarget:self action:@selector(switchViews) forControlEvents:UIControlEventTouchUpInside];

And to switch the views I have the following;

Code:

- (void)switchViews
{
    [UIView beginAnimations:@"View Flip" context:nil];
    [UIView setAnimationDuration:1.25];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
    
    UIViewController *coming=nil;
    UIViewController *going=nil;
    UIViewAnimationTransition transition;
    
    if(self.firstViewController.view.superview==nil) 
    {   
        coming=self.firstViewController;
        going=self.secondViewController;
        transition=UIViewAnimationTransitionFlipFromLeft;
    }
    else
    {
        coming=self.secondViewController;
        going=self.firstViewController;
        transition = UIViewAnimationTransitionFlipFromRight;
    }
    
    [UIView setAnimationTransition: transition forView:view1 cache:YES];
    [coming viewWillAppear:YES];
    [going viewWillDisappear:YES];
    [going.view removeFromSuperview];
    [view1 insertSubview: coming.view atIndex:0];
    [going viewDidDisappear:YES];
    [coming viewDidAppear:YES];

    [UIView commitAnimations];    
}

Any help would be awesome as I am an iOS / XCode / Mac newbie, with solid programming experience under Windows & C++.

Trying to come to the light side!