Add parameter for the default selected tab

mpdifran · Feb 27, 2023 · aa46555 · aa46555
1 parent 6b4e0de
commit aa46555
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Showing 2 changed files with 12 additions and 2 deletions.
diff --git a/Sources/AdaptiveTabView/AdaptiveTabView.swift b/Sources/AdaptiveTabView/AdaptiveTabView.swift
@@ -35,6 +35,7 @@ public enum AdaptiveTabViewSplitViewKind {
 public struct AdaptiveTabView<TabContent: Sequence, SidebarExtraContent: View, DefaultContentView: View, DefaultDetailView: View>: View where TabContent.Element: TabContentView {
 
     private let appName: String
+    private let defaultSelectedTab: UInt
     private let splitViewKind: AdaptiveTabViewSplitViewKind
     private let tabViewBuilder: (AdaptiveTabViewContainerKind) -> TabContent
     private let defaultContentBuilder: () -> DefaultContentView
@@ -44,6 +45,7 @@ public struct AdaptiveTabView<TabContent: Sequence, SidebarExtraContent: View, D
     /// Creates an ``AdaptiveTabView``.
     /// - parameter appName: The name of the app. This appears as the navigation title of the sidebar when the kind
     /// is ``AdaptiveTabViewContainerKind.sidebarKind``.
+    /// - parameter defaultSelectedTab: Which tab is selected by default when in ``AdaptiveTabViewContainerKind.tabView``.
     /// - parameter splitViewKind: The type of split view to use.
     /// - parameter tabViews: A view builder to provide the views for the tabs. In ``AdaptiveTabViewContainerKind.tabView``, they appear as
     /// tabs within a ``NavigationView``. In ``AdaptiveTabViewContainerKind.sidebarView``, they appear at the top of the sidebar. You can
@@ -56,13 +58,15 @@ public struct AdaptiveTabView<TabContent: Sequence, SidebarExtraContent: View, D
     /// is ``AdaptiveTabViewContainerKind.sidebarView``.
     public init(
         appName: String,
+        defaultSelectedTab: UInt = 0,
         splitViewKind: AdaptiveTabViewSplitViewKind = .threeColumn,
         @SequenceBuilder tabViews: @escaping (AdaptiveTabViewContainerKind) -> TabContent,
         @ViewBuilder defaultContent: @escaping () -> DefaultContentView = { EmptyView() },
         @ViewBuilder defaultDetail: @escaping () -> DefaultDetailView,
         @ViewBuilder sidebarExtraContent: @escaping () -> SidebarExtraContent = { EmptyView() }
     ) {
         self.appName = appName
+        self.defaultSelectedTab = defaultSelectedTab
         self.splitViewKind = splitViewKind
         self.tabViewBuilder = tabViews
         self.defaultContentBuilder = defaultContent
@@ -77,6 +81,7 @@ public struct AdaptiveTabView<TabContent: Sequence, SidebarExtraContent: View, D
             switch horizontalSizeClass {
             case .compact:
                 TabLayoutView(
+                    defaultSelectedTab: defaultSelectedTab,
                     tabViewBuilder
                 )
             default:

diff --git a/Sources/AdaptiveTabView/TabLayout/TabLayoutView.swift b/Sources/AdaptiveTabView/TabLayout/TabLayoutView.swift
@@ -10,28 +10,33 @@ import SequenceBuilder
 
 struct TabLayoutView<TabContent: Sequence>: View where TabContent.Element: TabContentView {
 
+    @State private var selectedTab: UInt
+
     private let tabViews: TabContent
 
     init(
+        defaultSelectedTab: UInt,
         @SequenceBuilder _ tabViewBuilder: (AdaptiveTabViewContainerKind) -> TabContent
     ) {
+        self._selectedTab = State(initialValue: defaultSelectedTab)
         self.tabViews = tabViewBuilder(.tabView)
     }
 
     var body: some View {
-        TabView {
+        TabView(selection: $selectedTab) {
             ForEach(sequence: tabViews) { (index, tabView) in
                 TabNavigationView {
                     tabView
                 }
+                .tag(index)
             }
         }
     }
 }
 
 struct TabLayoutView_Previews: PreviewProvider {
     static var previews: some View {
-        TabLayoutView { (_) in
+        TabLayoutView(defaultSelectedTab: 0) { (_) in
             PreviewTitleImageProvidingView()
         }
     }