- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)

interfaceOrientation duration:(NSTimeInterval)duration {

    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);//纵方向-20

    }

    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 ==

             UIInterfaceOrientationPortraitUpsideDown) {

        self.view = self.portrait;

        self.view.transform = CGAffineTransformIdentity;

        self.view.transform =

        CGAffineTransformMakeRotation(degreesToRadians(180));

        self.view.bounds = CGRectMake(0.0, 0.0, 320.0, 460.0);

    }

    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);

    }

}