Flipping two UIView using CATransform3D - iphone

Question

I have created Visiting Card which has Front view & back View. When i tap on the front view it should flip the UIView & show the back side of the View.
Here is Code which I am trying:
CATransform3D transform = CATransform3DMakeRotation(M_PI, 0, 1, 0);
transform.m34 = 1.0/700.0;
CABasicAnimation *rotation = [CABasicAnimation animationWithKeyPath:#"transform"];
rotation.fromValue = [NSValue valueWithCATransform3D:CATransform3DIdentity];
rotation.toValue = [NSValue valueWithCATransform3D:transform];
rotation.duration = DURATION;
CABasicAnimation *translation = [CABasicAnimation animationWithKeyPath:#"position"];
translation.fromValue = [NSValue valueWithCGPoint:CGPointMake(self.imageview.center.x,[[self.imageview superview] center].y-45)];
translation.toValue = [NSValue valueWithCGPoint:CGPointMake(_frame.origin.x+_frame.size.width/2,
_frame.origin.y+_frame.size.height/2)];
translation.duration = DURATION;
CABasicAnimation *translation = [CABasicAnimation animationWithKeyPath:#"position"];
translation.fromValue = [NSValue valueWithCGPoint:CGPointMake(self.imageview.center.x,[[self.imageview superview] center].y-45)];
translation.toValue = [NSValue valueWithCGPoint:CGPointMake(_frame.origin.x+_frame.size.width/2,
_frame.origin.y+_frame.size.height/2)];
translation.duration = DURATION;
CAAnimationGroup *group = [CAAnimationGroup animation];
group.animations = #[ translation, rotation ];
group.duration = DURATION;
group.delegate = self;
group.fillMode = kCAFillModeForwards;
group.removedOnCompletion = NO;
[layer addAnimation:group forKey:nil];
Above code works perfectly for single view. How to combine the 2nd view to get flipping from front & back effect.

Answer 1

Using Core Animation
You can add both front and back to a container view. The back view will have a 180 degree rotation around Y and the front will be just normal. Both layers will be single sided (by setting layer.doubleSided = NO;.
Then when you apply the rotation you would animate the rotation of the container view so that both front and back animate at the same time.
UIView transitions
Or you could just use the built in flip animation
transitionFromView:toView:duration:options:completion:
and pass either UIViewAnimationOptionTransitionFlipFromLeft or UIViewAnimationOptionTransitionFlipFromRight for the option.