A container that makes implementing stateful previews in SwiftUI easier

StatefulPreviewContainer.swift

struct StatefulPreviewContainer<Value, Content: View>: View {
  @State var value: Value
  var content: (Binding<Value>) -> Content
  
  var body: some View {
    content($value)
  }
  
  init(_ value: Value, content: @escaping (Binding<Value>) -> Content) {
    self._value = State(wrappedValue: value)
    self.content = content
  }
}

TodoRowView.swift

// Here is how to use the stateful preview container

struct TodoRowView_Previews_withGenericWrapper: PreviewProvider {
  static var previews: some View {
    StatefulPreviewContainer(Todo.sampple) { binding in
      TodoRowView(todo: binding)
    }
  }
}

// Everything below: views and data model used in the above code snippet

struct Todo: Identifiable {
  var id = UUID().uuidString
  var title: String
  var completed: Bool
}

extension Todo {
  static var samples = [
    Todo(title: "Write sample code", completed: false),
    Todo(title: "Draft article", completed: false),
    Todo(title: "???", completed: false),
    Todo(title: "PROFIT!!!", completed: false)
  ]

  static var sampple = Self.samples[0]
}

struct TodoRowView: View {
  @Binding var todo: Todo
  
  var body: some View {
    Toggle(isOn: $todo.completed) {
      Text(todo.title)
        .strikethrough(todo.completed)
    }
  }
}