Improve Page View

Modules/PageView/PageView.swift

@@ -16,6 +16,7 @@ public final class PageView<ContentView: StatefulViewProtocol>: StatefulView<Pag
     private lazy var scrollView: UIScrollView = .instantiate()
     private lazy var contentViews: [ContentView] = []
     private var contentViewIndex: Int = 0
+    private var verticalScrollEnabled: Bool = true
 
     public override func viewDidLoad() {
         super.viewDidLoad()
@@ -35,6 +36,7 @@ public final class PageView<ContentView: StatefulViewProtocol>: StatefulView<Pag
     public override func didChangeModel() {
         super.didChangeModel()
 
+        verticalScrollEnabled = model.verticalScrollEnabled
         switch model.axis {
         case .horizontal:
             scrollView.alwaysBounceHorizontal = true
@@ -65,6 +67,14 @@ public final class PageView<ContentView: StatefulViewProtocol>: StatefulView<Pag
         updateContentLayout()
     }
 
+    public func scrollToPage(atIndex index: Int, animated: Bool = true) {
+        let contentOffset = CGPoint(
+            x: CGFloat(index) * bounds.width,
+            y: scrollView.contentOffset.y
+        )
+        scrollView.setContentOffset(contentOffset, animated: animated)
+    }
+
     private func updateContentLayout() {
         let totalContentDimension = CGFloat(contentViews.count) * min(bounds.width, bounds.height)
         scrollView.contentSize = CGSize(
@@ -82,6 +92,9 @@ public final class PageView<ContentView: StatefulViewProtocol>: StatefulView<Pag
     }
 
     public func scrollViewDidScroll(_ scrollView: UIScrollView) {
+        if((scrollView.contentOffset.y > 0 || scrollView.contentOffset.y < 0) && !verticalScrollEnabled) {
+            scrollView.contentOffset.y = 0
+        }
         let newContentViewIndex: Int
         switch model.axis {
         case .horizontal:

Modules/PageView/PageViewModel.swift

@@ -25,19 +25,25 @@ public struct PageViewModel<Content: ViewModelProtocol>: ViewModelProtocol {
     /// The callback for page index changes.
     public let onPageIndexChanged: PageIndexChangeCallback
 
+    /// Wheter the PageView is vertically scrollable or not.
+    public let verticalScrollEnabled: Bool
+
     /// The default initializer of `PageViewModel`.
-    /// 
+    ///
     /// - Parameter axis: The scroll axis for the paging behaviour.
     /// - Parameter pages: The paginated content view models.
     /// - Parameter onPageIndexChanged: The content view models for the paginated content views.
+    /// - Parameter verticalScrollEnabled: Whether the pageview is scrolling verticaly or not.
     public init(
         axis: Axis = PageViewModel.default.axis,
         pages: [Content] = PageViewModel.default.pages,
-        onPageIndexChanged: @escaping PageIndexChangeCallback = PageViewModel.default.onPageIndexChanged
+        onPageIndexChanged: @escaping PageIndexChangeCallback = PageViewModel.default.onPageIndexChanged,
+        verticalScrollEnbaled: Bool = PageViewModel.default.verticalScrollEnabled
     ) {
         self.axis = axis
         self.pages = pages
         self.onPageIndexChanged = onPageIndexChanged
+        self.verticalScrollEnabled = verticalScrollEnbaled
     }
 }
 
@@ -47,7 +53,8 @@ extension PageViewModel {
         return .init(
             axis: .horizontal,
             pages: [],
-            onPageIndexChanged: { _ in }
+            onPageIndexChanged: { _ in },
+            verticalScrollEnbaled: true
         )
     }
 }