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flutter与原生混编(iOS)

flutter与原生混编(iOS)

作者: 夏天爱西瓜汁 | 来源:发表于2021-03-12 15:16 被阅读0次

一、创建项目及配置
1,创建ios项目,同时在同一个根目录下创建flutter项目
flutter项目使用命令flutter create -t module xxxflutter项目名
如图


工程目录.png

2,将flutter项目以pod的形式加入ios项目
2.1,如果项目之前没有用过pod,则pod init创建podfile
如果使用过,直接进行步骤2.2。
2.2,podfile中添加

flutter_application_path = '../xxxflutter项目名'
load File.join(flutter_application_path, '.ios', 'Flutter', 'podhelper.rb')

flutter_application_path是flutter项目的路径
2.3,target中加入(一次性将flutter的编译产物由此依赖进入iOS项目中,可跳过步骤3)

install_all_flutter_pods(flutter_application_path)

3,配置脚本(已完成步骤2.3可进行步骤4)
打开ios项目,在Build Phases中左上角添加Run Script


添加Run Script.png
Run Script内容.png
"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh" build
"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh" embed 

4,设置bitcode
Flutter 目前还不支持 BitCode,需要设置为No


图片.png

二、混编使以后添加的每个模块都以package形式,在module中pubspec.yaml文件中引用(基于内存消耗考虑)
1,页面跳转
原生处理:
flutter在iOS中的使用,主要是以FlutterViewController为载体,并在其内部采用FlutterEngine对视图进行渲染。
导入头文件:

#import <Flutter/Flutter.h>
初始化FlutterEngine:
FlutterEngine *engine = [[FlutterEngine alloc] initWithName:@"xxx"];//xxx是唯一标识
if ([engine run]) {
    self.flutterEngine = engine;
}
初始化flutter控制器
_flutterVC = [[FlutterViewController alloc] initWithEngine:self.flutterEngine nibName:nil bundle:nil];
跳转
//“channelA”与flutter定义的名字保持一致
FlutterMethodChannel *methodChannel = [FlutterMethodChannel methodChannelWithName:@"channelA" binaryMessenger:self.flutterVC];
//使用指定的参数调用指定的Flutter方法,“methodA”与flutter定义的名字保持一致
[methodChannel invokeMethod:@"methodA" arguments:nil];
根据flutter定义的方法名做相应的操作:在flutter页面点击按钮跳转至原生页面
[methodChannel setMethodCallHandler:^(FlutterMethodCall * _Nonnull call, FlutterResult  _Nonnull result) {
    if ([call.method isEqualToString:@"next"]) { //”next“为flutter定义的方法
        NativeViewController *vc = [[NativeViewController alloc] init];
        [self.navigationController pushViewController:vc animated:YES];
    }
}];
[self.navigationController pushViewController:self.flutterVC animated:YES]; //跳转至flutter页面

flutter处理:
在module项目的main里

导入头文件
import 'package:flutter/services.dart';

定义channel,名字与原生保持一致

final MethodChannel _channelA = MethodChannel("methodA");
在init方法里添加在该channel上接收方法的回调
此处_pageIndex用来处理显示flutter哪个页面
_channelOne.setMethodCallHandler((call) {
  setState(() {
    _pageIndex = call.method;
  });
  return null;
});
flutter页面点击按钮跳转至原生页面
onTap: () {
  MethodChannel(“channelA”).invokeMethod(“next”); 
  //channel名字和method名字需与原生保持一致
}

2,数据传递
二者之间的数据传递iOS使用FlutterBasicMessageChannel类,flutter使用BasicMessageChannel类,用法与MethodChannel类似
原生处理:

初始化channel
self.msgChannel = [FlutterBasicMessageChannel messageChannelWithName:@“messageChannel" binaryMessenger:self.flutterVC];//同样 channel名字与flutter保持一致

接收数据:

处理接收到的flutter数据
[self.msgChannel setMessageHandler:^(id  _Nullable message, FlutterReply  _Nonnull callback) {
    NSLog(@"收到了来自flutter的消息:%@",message);
}];

发送数据:

在需要向flutter发送数据的地方调用
[self.msgChannel sendMessage:message];

flutter处理:

首先依然是导入头文件
import 'package:flutter/services.dart';

初始化channel,channel名字与原生保持一致
final BasicMessageChannel _msgChannel =
 BasicMessageChannel("messageChannel", StandardMessageCodec());
接收数据:
在init方法里添加在该channel上接收方法的回调
_msgChannel.setMessageHandler((message) {
  print("收到了来之iOS的消息:$message");
  return null;
});
发送数据:在需要的地方之间调用send方法即可
_msgChannel.send(message);

问题:


问题.png

网上搜的方法,在podfile最前边加eval(File.read(File.join(flutter_application_path, '.ios', 'Flutter', 'podhelper.rb')), binding)句话
执行pod install失败

# Uncomment the next line to define a global platform for your project
# platform :ios, '9.0'

flutter_application_path = '../flutter_module'
eval(File.read(File.join(flutter_application_path, '.ios', 'Flutter', 'podhelper.rb')), binding)

target 'iosfix' do
  # Comment the next line if you don't want to use dynamic frameworks
  use_frameworks!

  # Pods for iosfix
  install_all_flutter_pods(flutter_application_path)

  target 'iosfixTests' do
    inherit! :search_paths
    # Pods for testing
    install_all_flutter_pods(flutter_application_path)
  end

  target 'iosfixUITests' do
    # Pods for testing
    install_all_flutter_pods(flutter_application_path)
  end

end

于是又搜了下别的文章,添加的第二句话为load File.join(flutter_application_path, '.ios', 'Flutter', 'podhelper.rb'),试了下成功了

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