Merge pull request Jinxiansen#1 from alexp141/menus

Menus

Author: alexp141

Example/Example/ContentView.swift

@@ -108,6 +108,9 @@ struct ContentView : View {
                     NavigationLink(destination: FormPage(firstName: "", lastName: "")) {
                            PageRow(title: "Form",subTitle: "表单视图")
                     }
+                    NavigationLink(destination: MenuPage()) {
+                           PageRow(title: "Menu",subTitle: "Menu Page")
+                    }
                 }
                 Section(header: Text("导航视图")) {
                     NavigationLink(destination: NavigationViewPage()) {

Example/Example/Page/Container/MenuPage.swift

@@ -0,0 +1,68 @@
+//
+//  MenuPage.swift
+//  Menu Example
+//
+//  Created by alexp141 on 4/28/23.
+//  Copyright © 2023 晋先森. All rights reserved.
+//
+
+import SwiftUI
+
+//showing of Menus introduced in iOS 14
+struct MenuPage: View {
+    @State private var message: String = "Click the menu button"
+    @State private var image: Image?
+    @State private var messageColor: Color = .black
+    
+    var body: some View {
+        VStack {
+            Text(message).foregroundColor(messageColor)
+            if let image = image {
+                image.resizable().frame(width: 200, height: 200)
+            }
+            Menu {
+                Button("Display Text") {
+                    self.message = "You have clicked the text button"
+                }
+                
+                Button("Show Image") {
+                    self.image = Image("icon")
+                    
+                }
+                //Menus can appear inside other Menus
+                Menu {
+                    Button("Red") {
+                        self.messageColor = .red
+                    }
+                    Button("Green") {
+                        self.messageColor = .green
+                    }
+                    Button("Blue") {
+                        self.messageColor = .blue
+                    }
+                    Button("Black") {
+                        self.messageColor = .black
+                    }
+                } label: {
+                    Button("Text Color") {
+                        //button clicked
+                    }
+                }
+            } label: {
+                Button("Menu") {
+                    //button clicked
+                }.frame(width: 150, height: 35)
+                    .foregroundColor(.white)
+                    .background(.blue)
+                    .cornerRadius(10.0)
+            }
+        }
+        
+    }
+}
+
+struct MenuPage_Previews: PreviewProvider {
+    static var previews: some View {
+        MenuPage()
+    }
+}