(iOS) Going from Portrait to Landscape and back

BIDVIewController.mm

//When the iPhone changes rotation, this method is triggered.
//Once you have 2 nibs on your controller with connected outlet collections (if necessary)
//and actions of both portrait and landscape nibs to the same method
//.
//You need to create to seperate outlets of both VIEWS in the viewcontroler .h file.
//@property (strong, nonatomic) IBOutlet UIView *portrait;
//@property (strong, nonatomic) IBOutlet UIView *landscape;


#define degreesToRadians(x) (M_PI * (x) / 180.0)

- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)
interfaceOrientation duration:(NSTimeInterval)duration
{

    //Note: tabbar is 20 pixels so we have to make view bounds accordingly
    if (interfaceOrientation == UIInterfaceOrientationPortrait) 
    {
        self.view = self.portrait;
        self.view.transform = CGAffineTransformIdentity;
        self.view.transform = CGAffineTransformMakeRotation(degreesToRadians(0));
        self.view.bounds = CGRectMake(0.0, 0.0, 320.0, 460.0);
    }
    else if (interfaceOrientation == UIInterfaceOrientationLandscapeLeft) 
    {
        self.view = self.landscape;
        self.view.transform = CGAffineTransformIdentity;
        self.view.transform = CGAffineTransformMakeRotation(degreesToRadians(-90));
        self.view.bounds = CGRectMake(0.0, 0.0, 480.0, 300.0);
    }
    else if (interfaceOrientation == UIInterfaceOrientationLandscapeRight) 
    {
        self.view = self.landscape;
        self.view.transform = CGAffineTransformIdentity;
        self.view.transform =
        CGAffineTransformMakeRotation(degreesToRadians(90));
        self.view.bounds = CGRectMake(0.0, 0.0, 480.0, 300.0);
    }
}

ViewController_Action.mm

//When having the 2 versions of a button for example in outlet collections
//from the 2 portrait-lanscape views

//Here;s how to choose which button is clicked each time
- (IBAction)buttonTapped:(id)sender
{
    if ([self.foos containsObject:sender])
    {
        for (UIButton *oneFoo in self.foos)
        {
            oneFoo.hidden = YES;
        }
    }
    else
    {
        for (UIButton *oneBar in self.bars)
        {
            oneBar.hidden = YES;
        }
    }
}