[Cast Docs] Codelab

[jholtzkener-at-cbc]

from https://developers.google.com/cast/codelabs/cast-videos-ios#3

Note: The project is able to build, but will not run until the ‘Adding the Cast button' section is completed

The starter project is not able to build out of the box on Xcode 13.0. There are five errors throughout the project all with the line
appDelegate?.isCastControlBarsEnabled = false (Value of type 'AppDelegate' has no member 'isCastControlBarsEnabled').

isCastControlBarsEnabled is there in final version, but definitely not in the starter