How to fix SwiftUI iOS 14: [Assert] displayModeButtonItem is internally managed and not exposed for DoubleColumn style. Returning an empty, disconnected UIBarButtonItem to fulfill the non-null contract.
Summary
How to fix SwiftUI iOS 14: [Assert] displayModeButtonItem is internally managed and not exposed for DoubleColumn style. Returning an empty, disconnected UIBarButtonItem to fulfill the non-null contract. After updating my iOS 13 app to iOS 14, I am seeing this error and my navbar was not working properly. To fix this error, I just have to do one change: I no longer see the error.
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