Open UISplitViewController to Master View rather than Detail

Question

I have a split-view interface with a target iPhone 6 application. On the first launch of the application, it opens to the Detail View; I would like it to open to the Master

Answer 1

iOS 14

I wasn't getting a callback for splitViewController(_:collapseSecondary:onto:) and instead used the following new method.

func splitViewController(_ svc: UISplitViewController, topColumnForCollapsingToProposedTopColumn proposedTopColumn: UISplitViewController.Column) -> UISplitViewController.Column {
    return .primary
}