発生した事象

環境

Xcode 12.3
Build version 12C33
Apple Swift version 5.3.2 (swiftlang-1200.0.45 clang-1200.0.32.28)
Target: x86_64-apple-darwin19.6.0

let height = navigationController?.view.safeAreaInsets.top ?? 
let height = view.safeAreaInsets.top