一  创建Flutter 模块

命令行

flutter create --template module my_flutter

创建完成后，该模块和普通的Flutter项目一直，可以通过Android Studio或VSCode打开、开发、运行；

• 和之前项目不同的iOS和Android项目是一个隐藏文件，并且我们通常不会单独打开它们再来运行；

• 它们的作用是将Flutter Module进行编译，之后继承到现有的项目中

my_flutter/
├── .ios/
├── .android/
├── lib/
│   └── main.dart
├── test/
└── pubspec.yaml

二 嵌入到iOS 项目

主要是通过pod 进行设置，之后pod install

注意my_flutter 的路径对不对

platform :ios, '12.0'
# 添加模块所在路径
flutter_application_path = '../my_flutter'
load File.join(flutter_application_path, '.ios', 'Flutter', 'podhelper.rb')target 'FlutterHybridDemo' do# Comment the next line if you don't want to use dynamic frameworksuse_frameworks!# 安装Flutter模块install_all_flutter_pods(flutter_application_path)# Pods for FlutterHybridDemoendpost_install do |installer|flutter_post_install(installer) if defined?(flutter_post_install)end

三  iOS 项目中调用

为了在既有的iOS应用中展示Flutter页面，需要启动 Flutter Engine和 FlutterViewController

AppDelegate 中设置代码

import UIKit
import FlutterPluginRegistrant
@main
class AppDelegate: UIResponder, UIApplicationDelegate {// 1.创建一个FlutterEngine对象lazy var flutterEngine = FlutterEngine(name:"my flutter engine")func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {// Override point for customization after application launch.// 2 启动flutterEngine.run()return true}

在ViewControlelr 设置的代码

import UIKit
import Flutter
class ViewController: UIViewController {override func viewDidLoad() {super.viewDidLoad()// Do any additional setup after loading the view.let btn = UIButton(type: UIButton.ButtonType.custom)btn.setTitle("加载flutter", for: UIControl.State.normal)btn.frame = CGRect(x: 50, y: 50, width: 200, height: 50)btn.backgroundColor = UIColor.bluebtn.addTarget(self, action: #selector(showFlutter), for: UIControl.Event.touchUpInside)view.addSubview(btn)}@objc func showFlutter(){let flutterEngine = (UIApplication.shared.delegate as! AppDelegate).flutterEnginelet flutterController = FlutterViewController(engine:flutterEngine, nibName: nil, bundle: nil)present(flutterController, animated: true)}}

显示的结果  顺利加载出flutter 的页面