从0开始模拟Flutter-module嵌入iOS原生项目的流程。
环境是：xcode13.1、Android studio Arctic Fox | 2020.3.1 Patch 4、Flutter SDK 2.10.1

1、创建文件夹和文件

根据官网的文档，首先，在桌面创建一个名为native_import_flutter_demo的文件夹，然后在该文件夹内分别创建了iOS_demo、flutter_module两个文件。关于flutter_module，可以用命令行：

flutter create --template module flutter_module

flutter_module.png

image.png

2、添加Podfile

这个可以在终端创建一个，也可从别的地方拷贝一个

3、Podfile配置

flutter_application_path = '../flutter_module'
load File.join(flutter_application_path, '.ios', 'Flutter', 'podhelper.rb')

target 'iOS_demo' do
  install_all_flutter_pods(flutter_application_path)
end

4、执行 pod install

终端 cd 到 iOS_demo 目录，执行pod install

5、运行iOS项目

如果出现如下错误：

142CFCF14A8DF8C9B112711396247D97.png

运行成功不报错，则表示flutter-module嵌入成功。

6、添加一个Flutter页面

AppDelegate.h：

#import <UIKit/UIKit.h>
@import Flutter;
@interface AppDelegate : FlutterAppDelegate
@property (nonatomic,strong) FlutterEngine *flutterEngine;
@end

AppDelegate.m:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    
    self.flutterEngine = [[FlutterEngine alloc] initWithName:@"my flutter engine"];
  
     [self.flutterEngine run];
   
     [GeneratedPluginRegistrant registerWithRegistry:self.flutterEngine];
     return [super application:application didFinishLaunchingWithOptions:launchOptions];
}

ViewController.m:

@import Flutter;
#import "AppDelegate.h"
#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
       [button addTarget:self
                  action:@selector(showFlutter)
        forControlEvents:UIControlEventTouchUpInside];
       [button setTitle:@"Show Flutter!" forState:UIControlStateNormal];
       button.backgroundColor = UIColor.blueColor;
       button.frame = CGRectMake(80.0, 210.0, 160.0, 40.0);
       [self.view addSubview:button];
}
- (void)showFlutter {
    FlutterEngine *flutterEngine =((AppDelegate *)UIApplication.sharedApplication.delegate).flutterEngine;
    FlutterViewController *flutterViewController =[[FlutterViewController alloc]initWithEngine:flutterEngine nibName:nil bundle:nil];
    
    [self presentViewController:flutterViewController animated:YES completion:nil];
}

@end

7、再次运行iOS项目

出现如下问题：

image.png

info.png

再次运行iOS，提示"无法打开“iproxy”,因为无法验证开发者。"（忘了截图）
我查看隐私设置吗，已经是"允许任何来源"

image.jpg

53018C54D11244DBE34816965CB9DFCB.png

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7、在flutter_module里执行flutter attach 进行热更新

image.png

修改flutter的元素，输入r来更新。

Demo的github地址：native_import_flutter_demo

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