Callback for top card if trait collection changes (#18)

skedgo · Jun 23, 2023 · b96668e · b96668e
1 parent f4ef72f
commit b96668e
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diff --git a/Sources/TGCardViewController/TGCardViewController.swift b/Sources/TGCardViewController/TGCardViewController.swift
@@ -470,6 +470,8 @@ open class TGCardViewController: UIViewController {
     // to landscape mode, the card will be in the extended state, which requires
     // the card's contents to be scrollable. Hence, we reenable the scolling.
     updateCardScrolling(allow: true, view: topCardView)
+
+    topCard?.traitCollectionDidChange(previousTraitCollection)
   }
 
   private func updateCardScrolling(allow: Bool, view: TGCardView?) {

diff --git a/Sources/TGCardViewController/cards/TGCard.swift b/Sources/TGCardViewController/cards/TGCard.swift
@@ -270,6 +270,14 @@ open class TGCard: UIResponder, TGPreferrableView {
     viewIsVisible = false
   }
 
+  /// Called when the card is the top card and the trait collection of the TGCardViewController change
+  ///
+  /// Get the current/new trait collection by calling `controller?.traitCollection`.
+  ///
+  /// - Parameter previousTraitCollection: Previous trait collection, if any
+  open func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
+  }
+
   /// Called when the card moved, potentially to a new position
   ///
   /// - Parameters: