FlutterIOs全能编程开发工程师指南

一、FlutterIOs打包

1、FlutterIOs是一款跨平台开发框架，支持一次编写，多平台运行

2、在FlutterIOs开发完成后，需要对应用进行打包

3、执行以下命令进行打包:

 flutter build ios --release --no-codesign

该命令会在FlutterIos项目的build/ios下生成Runner.xcarchive文件，即为我们需要的打包文件。

二、FlutterIOs应用上架

1、在成功打包之后，我们需要将应用上传到App Store进行上架

2、首先需要在App Store Connect中创建应用信息

3、通过Xcode将Runner.xcarchive文件上传到App Store Connect中的应用信息中，进行审核和上架

三、FlutterIOs开发

1、FlutterIOs拥有丰富的UI组件库，开发者可以通过调用这些组件来实现应用的不同布局

2、FlutterIOs支持响应式编程，可以根据不同设备的大小自适应界面

3、FlutterIOs的开发语言为Dart，可以使用熟悉的OOP思维进行编程

4、示例代码：

  import 'package:flutter/material.dart';
  
  class MyApp extends StatelessWidget {
    @override
    Widget build(BuildContext context) {
      return MaterialApp(
        title: 'Flutter Demo',
        theme: ThemeData(
          primarySwatch: Colors.blue,
        ),
        home: MyHomePage(title: 'Flutter Demo Home Page'),
      );
    }
  }
  
  class MyHomePage extends StatefulWidget {
    MyHomePage({Key key, this.title}) : super(key: key);
  
    final String title;
  
    @override
    _MyHomePageState createState() => _MyHomePageState();
  }
  
  class _MyHomePageState extends State {
    int _counter = 0;
  
    void _incrementCounter() {
      setState(() {
        _counter++;
      });
    }
  
    @override
    Widget build(BuildContext context) {
      return Scaffold(
        appBar: AppBar(
          title: Text(widget.title),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Text(
                'You have pushed the button this many times:',
              ),
              Text(
                '$_counter',
                style: Theme.of(context).textTheme.headline4,
              ),
            ],
          ),
        ),
        floatingActionButton: FloatingActionButton(
          onPressed: _incrementCounter,
          tooltip: 'Increment',
          child: Icon(Icons.add),
        ),
      );
    }
  }

四、FlutterIOs音量不能调节媒体选取

1、FlutterIOs在调用媒体选取的时候，无法调节音量大小

2、需要将FlutterIOs项目中iOS目录的Info.plist文件，增加如下字段:

  UIUserInterfaceStyle
  Light
  NSMicrophoneUsageDescription
  Allow access to microphone to record audio
  NSPhotoLibraryUsageDescription
  Allow access to photo library to select images and videos
  NSCameraUsageDescription
  Allow access to camera to take photos and videos
  NSAppleMusicUsageDescription
  Allow access to Apple Music to select songs for image/video
  NSMotionUsageDescription
  Allow access to motion and fitness to calculate health information
  NSBluetoothAlwaysUsageDescription
  Allow access to bluetooth
  NSBluetoothPeripheralUsageDescription
  Allow access to bluetooth
  UIBackgroundModes
  
      fetch
      remote-notification
      audio
      voip
      processing
      bluetooth-central
      bluetooth-peripheral
      background-fetch
      location
  
  io.flutter.embedded_views_preview
  

3、示例代码如下：

  
      CFBundleDevelopmentRegion
      $(DEVELOPMENT_LANGUAGE)
      CFBundleExecutable
      $(EXECUTABLE_NAME)
      CFBundleIdentifier
      $(PRODUCT_BUNDLE_IDENTIFIER)
      CFBundleInfoDictionaryVersion
      6.0
      CFBundleName
      $(PRODUCT_NAME)
      CFBundlePackageType
      FMWK
      CFBundleShortVersionString
      1.0
      CFBundleVersion
      1
      DTPlatformName
      iphoneos
      DTSDKName
      iphoneos14.5
      FlutterBuildNumber
      1.0.0
      FlutterPod
      Flutter
      LSRequiresIPhoneOS
      
      UIRequiredDeviceCapabilities
      
          armv7
          arm64
          gamekit
      
      UISupportedInterfaceOrientations
      
          UIInterfaceOrientationPortrait
      
      UIViewControllerBasedStatusBarAppearance
      
      UIUserInterfaceStyle
      Light
      NSMicrophoneUsageDescription
      Allow access to microphone to record audio
      NSPhotoLibraryUsageDescription
      Allow access to photo library to select images and videos
      NSCameraUsageDescription
      Allow access to camera to take photos and videos
      NSAppleMusicUsageDescription
      Allow access to Apple Music to select songs for image/video
      NSMotionUsageDescription
      Allow access to motion and fitness to calculate health information
      NSBluetoothAlwaysUsageDescription
      Allow access to bluetooth
      NSBluetoothPeripheralUsageDescription
      Allow access to bluetooth
      UIBackgroundModes
      
          fetch
          remote-notification
          audio
          voip
          processing
          bluetooth-central
          bluetooth-peripheral
          background-fetch
          location
      
      io.flutter.embedded_views_preview