I was trying to use the demo app showcased in WWDC20 and I've noticed it's not working very well because of API changes. It didn't draw points when I pinched my index and thumb. After I debugged the sample app a bit, I noticed that some raw values are mismatched. (lldb) po VNRecognizedPointKey.handLandmarkKeyThumbTIP.rawValue "VNHLKTTIP" (lldb) po point.key.rawValue "VNHLKTTip" Notice the raw values, one is full upper case, the other has lower case characters at the end. Another issue I've noticed is that asking for the index group actually gave me the locations for the middle finger group. I'm talking about handLandmarkRegionKeyMiddleFinger and handLandmarkRegionKeyIndexFinger. With those issues fixed, the hand tracking in the Vision framework works really nicely.

Hello. I've been testing our app on iOS and I've noticed a weird behaviour that happens on iOS 14, but it doesn't happen on iOS 13. It's regarding the navigation stack and how it works. Say I have a navigation stack of [A, B, C], where C is of course the topmost view controller. I have a button in the C view controller which gets the navigation stack, removes C and then B, and finally it adds a new view controller D. Then I set the new stack to the navigation controller. On iOS 13, the resulting stack is [A, D]. On iOS 14, the resulting stack is [C, A, D]. Somehow, it didn't let me remove the current view controller from the stack, but it did add to the bottom of the stack. My only explanation has been that it has something to do with the new navigation history feature in iOS 14 (long hold on the Back button). Somehow this introduced some new constraints on the management of the navigation stack. Hopefully someone can help me understand the new behaviour. Regards, Cristian