Fix Swift 6 concurrency warning

Author: danielsaidi

RELEASE_NOTES.md

@@ -6,6 +6,12 @@ Until then, deprecated features may be removed in any minor version.
 
 
 
+## 0.6.1
+
+This version adjusts the code to address a concurrency warning.
+
+
+
 ## 0.6
 
 This version makes ScrollKit use Swift 6.

Sources/ScrollKit/Examples/Spotify+PreviewScreen.swift

@@ -96,7 +96,9 @@ private extension View {
         #if os(macOS)
         Color.clear
         #endif
-        Spotify.PreviewScreen(info: .regina)
+        NavigationLink("Test") {
+            Spotify.PreviewScreen(info: .regina)
+        }
     }
     #if os(iOS)
     .navigationViewStyle(.stack)

Sources/ScrollKit/Helpers/ScrollViewOffsetTracker.swift

@@ -64,10 +64,14 @@ public extension View {
     /// view that has a ``ScrollViewOffsetTracker`` to track
     /// its scroll offset.
     func withScrollOffsetTracking(
-        action: @escaping (_ offset: CGPoint) -> Void
+        action: @escaping @MainActor @Sendable (_ offset: CGPoint) -> Void
     ) -> some View {
         self.coordinateSpace(name: ScrollOffsetNamespace.namespace)
-            .onPreferenceChange(ScrollOffsetPreferenceKey.self, perform: action)
+            .onPreferenceChange(ScrollOffsetPreferenceKey.self) { offset in
+                DispatchQueue.main.async {
+                    action(offset)
+                }
+            }
     }
 }
 

Sources/ScrollKit/ScrollViewWithOffsetTracking.swift

@@ -39,7 +39,7 @@ public struct ScrollViewWithOffsetTracking<Content: View>: View {
     private let onScroll: ScrollAction
     private let content: () -> Content
 
-    public typealias ScrollAction = (_ offset: CGPoint) -> Void
+    public typealias ScrollAction = @MainActor @Sendable (_ offset: CGPoint) -> Void
 
     public var body: some View {
         ScrollView(axes, showsIndicators: showsIndicators) {