Fixed a bug with no view due to the SwiftUI view lifecycle.

Sources/PartialSheet/PartialSheet/PSManager.swift

@@ -16,7 +16,7 @@ import SwiftUI
  contentView.environmentObject(sheetManager)
  ```
  */
-class PSManager: ObservableObject {
+public class PSManager: ObservableObject {
 
     /// Published var to present or hide the partial sheet
     @Published var isPresented: Bool = false {
@@ -50,7 +50,7 @@ class PSManager: ObservableObject {
     var slideAnimation: PSSlideAnimation
 
 
-    init() {
+    public init() {
         content = EmptyView().eraseToAnyView()
         slideAnimation = PSSlideAnimation()
     }

Sources/PartialSheet/PartialSheet/PSManagerWrapper.swift

@@ -24,6 +24,7 @@ struct PSManagerWrapper<Parent: View, SheetContent: View>: View {
     var body: some View {
         parent
             .onChange(of: isPresented, perform: {_ in updateContent() })
+            .task { updateContent() }
     }
 
     private func updateContent() {

Sources/PartialSheet/Public/View+PartialSheet.swift

@@ -27,8 +27,17 @@ public extension View {
      }
      ```
      */
-    func attachPartialSheetToRoot() -> some View {
-        let sheetManager: PSManager = PSManager()
+    func attachPartialSheetToRoot(manager: PSManager? = nil) -> some View {
+        let manager = {
+           if let manager {
+               return manager
+           } else {
+               return PSManager()
+           }
+        }() 
+
+        let sheetManager: PSManager = manager
+
         return self
             .modifier(PartialSheet())
             .environmentObject(sheetManager)