Manually adding the rootViewController’s view to the view hierarchy is no longer supported. Please allow UIWindow to add the rootViewController’s view to the view hierarchy itself.

I was having this issue when setting a new rootViewController from loginViewController , which was a rootViewController in the storyboard before the transition. I was not sure what was the problem. Since this works perfect on iOS 13 if I don’t use the [UIView transitionFromView] but I wanted to keep the animation effect, it looked …

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