Deceivingly simple answer to a view animation that keeps it's content in the same visual place as the view frame moves.

MTRXAnimatedViewLayer.m

- (void)addAnimation:(CAAnimation *)anim forKey:(NSString *)key {
	DDLogVerboseMethodCall(@" %@", [anim debugDescription]);
	
	CAAnimation *finalAnim = anim;
	if ([key isEqualToString:@"position"] && [anim isKindOfClass:[CABasicAnimation class]]) {
		CABasicAnimation *contentsRectAnim;
		CALayer *presentationLayer = [self presentationLayer];
		if (presentationLayer) {
			contentsRectAnim = [anim copy];
			contentsRectAnim.keyPath = @"contentsRect";
			contentsRectAnim.fromValue = [NSValue valueWithCGRect:self.contentsRect];
			
			// Calculate the toValue for the contentsRect
			CGRect newContentRect = presentationLayer.contentsRect;
			newContentRect.origin.x += (self.position.x - presentationLayer.position.x) / self.bounds.size.width;
			newContentRect.origin.y += (self.position.y - presentationLayer.position.y) / self.bounds.size.height;
			contentsRectAnim.toValue = [NSValue valueWithCGRect:newContentRect];
			[[self modelLayer] setContentsRect:newContentRect];
		}

		CAAnimationGroup *groupAnim = [CAAnimationGroup animation];
		groupAnim.animations = @[anim, contentsRectAnim];
		
		finalAnim = groupAnim;
	}
	
	[super addAnimation:finalAnim forKey:key];
}