CATransition curling page from top

Question

I realize there is a question with this title but it is not correctly answered. It seems impossible (on iOS 6 at least) to get a page curl animation to play from the top of the screen (i.e. peeling toward the home button).

CATransition *transition = [CATransition animation];
[transition setDelegate:self];
[transition setDuration:parameters.duration];
[transition setType:@"pageCurl"];
[transition setSubtype:kCAAnimationFromTop]; //kCAAnimationFromBottom plays the same thing
[layer addAnimation:transition forKey:@"curlAnim"];

Note: The answer is not "change pageCurl to PageUnCurl" (Uncurl is a different animation).

Has anyone done this?

Answer 1

From my testing, it just doesn't work. I have code using all four directions of every transition type but curl/uncurl from this particular direction doesn't work. It seems to me it's a bug but "pageCurl" transition is not even documented so it's difficult to report it.