Opaque UITabBar layout breaks on rotation on iPhone X

Number:rdar://36924354 Date Originated:January 26 2018, 5:15 PM
Status: Resolved:
Product:UIKit Product Version:iOS 11.0+
Classification:Bug Reproducible:Always
### Summary

Viewing fullscreen media in landscape with `isTranslucent = false` set on UITabBar results in broken layout on iPhone X.

### Steps to Reproduce

Create an iPhone app with:

- `isTranslucent = false` set on `UITabBar`
- Hide the tab bar when pushing a child controller
- From the child view controller, present fullscreen media
- When presenting fullscreen media, allow landscape orientation
- In all other cases, allow portrait orientation only

Run the app:

1. Navigate from the root view controller to the child view controller
2. Open fullscreen media
3. Rotate to landscape orientation
4. Return to the root view controller

### Expected Results

`UITabBar` should be 83pt in height and its buttons should be 48pt in height.

### Actual Results

`UITabBar` is 49pt in height and its buttons are 14pt in height.


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