// Curl the image up or down

    CATransition *animation = [CATransition animation];

    [animation setDuration:0.35];

    [animation setTimingFunction:UIViewAnimationCurveEaseInOut];

    if (!curled){

        //animation.type = @"mapCurl";

        animation.type = @"pageCurl";

        animation.fillMode = kCAFillModeForwards;

        animation.endProgress = 0.5;

    } else {

        //animation.type = @"mapUnCurl";

        animation.type = @"pageUnCurl";

        animation.fillMode = kCAFillModeBackwards;

        animation.startProgress = 0.5;

    }

    [animation setRemovedOnCompletion:NO];

    [self.view exchangeSubviewAtIndex:0 withSubviewAtIndex:1];

    

    [self.view.layer addAnimation:animation forKey :@"pageCurlAnimation"];

    // Disable user interaction where necessary

    if (!curled) {

        

    } else {

        

    }

    curled = !curled;

// Do any additional setup after loading the view, typically from a nib.