I have a CALayer that I want to animate across the screen. I have created two methods: one slide open the layer and one to slide close. These both work by assigning a property to the layer's transform property.

Now I want to use a CAKeyFrameAnimation to slide open the layer. I got this working so the layer slides open, but now I can't slide the layer close using my old method. I am trying to figure out why this is. Any help would be great.

Code:

- (id)init
{
  if( self = [super init] )
  {
    bIsOpen = NO;
    closeTransform = self.transform;
    openTransform = CATransform3DMakeTranslation(-235.0, 0.0, 0.0);
  }
  return self;
}

- (void)closeMenu
{
  if( bIsOpen )
  {
    self.transform = closeTransform;
    bIsOpen = !bIsOpen;
  }  
}

- (void)openMenu
{
  if( !bIsOpen )
  {
    CAKeyframeAnimation *closeAnimation = [CAKeyframeAnimation animationWithKeyPath:@"transform"];
    closeAnimation.duration = 1.0;
    closeAnimation.removedOnCompletion = NO;
    closeAnimation.fillMode = kCAFillModeForwards;
    closeAnimation.values = [NSArray arrayWithObjects:[NSValue valueWithCATransform3D:closeTransform],[NSValue valueWithCATransform3D:openTransform],nil];
    closeAnimation.timingFunctions = [NSArray arrayWithObject:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear]];

    [self addAnimation:closeAnimation forKey:@"transform"];
    bIsOpen = !bIsOpen;
  }
}