@TryLoveCatch 2019-09-19T07:14:20.000000Z 字数 5338 阅读 1766

Flutter之安装

flutter

配置镜像

export PUB_HOSTED_URL=https://pub.flutter-io.cn
export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn

镜像地址获取

方法一

Using Flutter in China

官网链接，里面有最新的镜像地址

方法二

Flutter中文版
右上角，有一个使用镜像，点击就能看到最新的镜像地址

下载flutter sdk

sdk列表

另外，下载之后，如果需要不同的flutter版本，我们是可以通过git来切换tag的

配置环境变量

open ~/.bash_profile
export FLUTTER_HOME=/Users/lipeng/work/flutter-sdk
export PATH=$PATH:$FLUTTER_HOME/flutter/bin
source ~/.bash_profile
echo $path

检查当前配置环境

flutter doctor

这个命令会检查你当前的配置环境，并在命令行窗口中生成一份报告。

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, v1.7.8+hotfix.4, on Mac OS X 10.13.6 17G65, locale
    zh-Hans-CN)
[!] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
    ! Some Android licenses not accepted.  To resolve this, run: flutter doctor
      --android-licenses
[✗] Xcode - develop for iOS and macOS
    ✗ Xcode installation is incomplete; a full installation is necessary for iOS
      development.
      Download at: https://developer.apple.com/xcode/download/
      Or install Xcode via the App Store.
      Once installed, run:
        sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer
    ✗ CocoaPods not installed.
        CocoaPods is used to retrieve the iOS and macOS platform side's plugin
        code that responds to your plugin usage on the Dart side.
        Without CocoaPods, plugins will not work on iOS or macOS.
        For more info, see https://flutter.dev/platform-plugins
      To install:
        brew install cocoapods
        pod setup
    ! Brew can be used to install CocoaPods.
      Download brew at https://brew.sh/.
[✗] iOS tools - develop for iOS devices
    ✗ libimobiledevice and ideviceinstaller are not installed. To install with
      Brew, run:
        brew update
        brew install --HEAD usbmuxd
        brew link usbmuxd
        brew install --HEAD libimobiledevice
        brew install ideviceinstaller
    ✗ ios-deploy not installed. To install:
        brew install ios-deploy
    ! Brew can be used to install tools for iOS device development.
      Download brew at https://brew.sh/.
[!] Android Studio (version 3.2)
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
[!] VS Code (version 1.36.0)
    ✗ Flutter extension not installed; install from
      https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter
[✓] Connected device (1 available)
! Doctor found issues in 5 categories.

对照提示，进行修改

安装插件

打开 Android Studio。
打开插件设置（macOS 系统打开 Preferences > Plugins， Windows 和 Linux 系统打开 File > Settings > Plugins）。
选择 Browse repositories，然后选择 Flutter 插件并点击安装。
当弹出安装 Dart 插件提示时，点击 Yes。
当弹出重新启动提示时，点击 Restart。

然后再次执行

flutter doctor

创建应用

打开 IDE，New - New Flutter project.
选择 Flutter Application
确认 Flutter SDK 路径区域所示路径是正确的 SDK 路径。如果你还没有安装 SDK，需要先进行安装，选择 Install SDK…。
输入项目名称(比如 ‘myapp’), 然后点击下一步。
点击完成。

导入工程

下载工程
使用Android Studio打开工程
Android Studio - Preferences，搜索flutter，在Lauguages & Frameworks下面，我们需要选择我们安装的flutter路径，如下图所示：
进入包含ysml的目录，执行

flutter clean
flutter packages get

打开目录下面的lib目录，点击右键main.dart，运行

常用命令

帮助

flutter支持的命令

flutter -h

执行结果：

Manage your Flutter app development.
Common commands:
  flutter create <output directory>
    Create a new Flutter project in the specified directory.
  flutter run [options]
    Run your Flutter application on an attached device or in an emulator.
Usage: flutter <command> [arguments]
Global options:
-h, --help                  Print this usage information.
-v, --verbose               Noisy logging, including all shell commands executed.
                            If used with --help, shows hidden options.
-d, --device-id             Target device id or name (prefixes allowed).
--version               Reports the version of this tool.
--suppress-analytics    Suppress analytics reporting when this command runs.
--bug-report            Captures a bug report file to submit to the Flutter team.
                        Contains local paths, device identifiers, and log snippets.
--packages              Path to your ".packages" file.
                        (required, since the current directory does not contain a ".packages" file)
Available commands:
analyze                  Analyze the project's Dart code.
attach                   Attach to a running application.
bash-completion          Output command line shell completion setup scripts.
build                    Flutter build commands.
channel                  List or switch flutter channels.
clean                    Delete the build/ and .dart_tool/ directories.
config                   Configure Flutter settings.
create                   Create a new Flutter project.
devices                  List all connected devices.
doctor                   Show information about the installed tooling.
drive                    Runs Flutter Driver tests for the current project.
emulators                List, launch and create emulators.
format                   Format one or more dart files.
help                     Display help information for flutter.
install                  Install a Flutter app on an attached device.
logs                     Show log output for running Flutter apps.
make-host-app-editable   Moves host apps from generated directories to non-generated directories so that they can be edited by developers.
precache                 Populates the Flutter tool's cache of binary artifacts.
pub                      Commands for managing Flutter packages.
run                      Run your Flutter app on an attached device.
screenshot               Take a screenshot from a connected device.
test                     Run Flutter unit tests for the current project.
upgrade                  Upgrade your copy of Flutter.
version                  List or switch flutter versions.

我们可以看到flutter支持的command：

analyze 
build                    
channel                  
clean                   
config                   
create                   
devices                  
doctor             
drive                  
emulators                
format                  
help                     
install                 
logs                     
make-host-app-editable   
precache        
pub     
run  
screenshot
test 
upgrade 
version

具体command的帮助

我们已build为例

flutter build -h