Material: Transitioning the RootViewController of a ToolbarController to an UITableViewController causes flickering

[timoschwarzer]

Transitioning the RootViewController of a ToolbarController to an UITableViewController causes the Toolbar not being shown for the duration of the transition:

myToolbarController.transition(to: myTableViewController, duration: TimeInterval(1))
-> Toolbar is hidden for 1 sec

Using a duration of 0 causes a bit flickering even with normal UIViewControllers.

[danieldahan]

Could you send me a sample of this?

[timoschwarzer]

@danieldahan You can take the programmatic NavigationDrawerController sample and make the TransitionedViewController extend UITableViewController instead of UIViewController. I tried this and it shows the mentioned effect.

[danieldahan]

This could be when the UITableVIewController is setup. Usually this is done after the view loads and could give a stutter effect. I will take a look and see if I can replicate the behavior.

Also, this issue came up and could be the same on StackOverflow - flickering behavior.

[timoschwarzer]

But the toolbar is hidden for exactly the same amount of time like the transition's duration is. So if you call transition(to: duration:) with a duration of 10sec, you won't see the toolbar for 10sec.

[danieldahan]

Ahh... I think I know why. Okay, I will take a look later today. I am finishing up some documentation, and then will tackle this issue and some others on the board. Thanks for bringing this to my attention.

[timoschwarzer]

Thanks! 😄

[danieldahan]

Thank you for sharing this issue with me. Please give Material 2.3.18 a try :)