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github地址 ​

https://github.com/jonataslaw/getx

getx功能 ​

路由管理 ​

普通路由 ​

命名路由 ​

状态管理 ​

介绍 ​

响应式编程可能会让很多人感到陌生，因为它很复杂，但是GetX将响应式编程变得非常简单。

  • 你不需要创建StreamControllers.
  • 你不需要为每个变量创建一个StreamBuilder。
  • 你不需要为每个状态创建一个类。
  • 你不需要为一个初始值创建一个get。

使用 Get 的响应式编程就像使用 setState 一样简单。

定义Obx变量的三种方式 ​

// 第一种 使用 Rx{Type}
// final name = RxString('');
// final isLogged = RxBool(false);
// final count = RxInt(0);
// final balance = RxDouble(0.0);
// final items = RxList<String>([]);
// final myMap = RxMap<String, int>({});

// 第二种是使用 Rx，规定泛型 Rx<Type>。
// final name = Rx<String>('');
// final isLogged = Rx<Bool>(false);
// final count = Rx<Int>(0);
// final balance = Rx<Double>(0.0);
// final number = Rx<Num>(0)
// final items = Rx<List<String>>([]);
// final myMap = Rx<Map<String, int>>({});
// 自定义类 - 可以是任何类
// final user = Rx<User>();

// 第三种更实用、更简单、更可取的方法，只需添加 .obs 作为value的属性。
// final name = ''.obs;
// final isLogged = false.obs;
// final count = 0.obs;
// final balance = 0.0.obs;
// final number = 0.obs;
// final items = <String>[].obs;
// final myMap = <String, int>{}.obs;
// 自定义类 - 可以是任何类
// final user = User().obs;

工具 ​

get_cli使用 ​

安装Cli脚手架 ​

我们通过命令flutter pub global activate get_cli 进行脚手架的全局安装，本文以Mac OS为例。

JMdeMacBook-Pro:~ jm$ flutter pub global activate get_cli

Resolving dependencies...
+ _fe_analyzer_shared 25.0.0
+ analyzer 2.2.0
+ ansicolor 2.0.1
+ archive 3.1.2
+ args 2.2.0
+ async 2.8.2
+ charcode 1.3.1
+ cli_dialog 0.5.0
+ cli_menu 0.3.0-nullsafety.0
+ cli_util 0.3.3
+ clock 1.1.0
+ collection 1.15.0
+ convert 3.0.1
+ crypto 3.0.1
+ dart_console 1.0.0
+ dart_style 2.0.3
+ ffi 1.1.2
+ file 6.1.2
+ get_cli 1.6.0
+ glob 2.0.1
+ http 0.13.3
+ http_parser 4.0.0
+ intl 0.17.0
+ matcher 0.12.11
+ meta 1.7.0
+ package_config 2.0.0
+ path 1.8.0
+ pedantic 1.11.1
+ process_run 0.12.1+1
+ pub_semver 2.0.0
+ pubspec 2.0.1
+ quiver 3.0.1
+ recase 4.0.0
+ source_span 1.8.1
+ stack_trace 1.10.0
+ string_scanner 1.1.0
+ synchronized 3.0.0
+ term_glyph 1.2.0
+ typed_data 1.3.0
+ uri 1.0.0
+ version 2.0.0
+ watcher 1.0.0
+ win32 2.2.9
+ yaml 3.1.0
Downloading get_cli 1.6.0...
Downloading version 2.0.0...
Downloading recase 4.0.0...
Downloading pubspec 2.0.1...
Downloading cli_menu 0.3.0-nullsafety.0...
Downloading cli_dialog 0.5.0...
Downloading ansicolor 2.0.1...
Downloading uri 1.0.0...
Downloading process_run 0.12.1+1...
Downloading synchronized 3.0.0...
Downloading dart_console 1.0.0...
Downloading quiver 3.0.1...
Downloading dart_style 2.0.3...
Downloading analyzer 2.2.0...
Downloading _fe_analyzer_shared 25.0.0...
Downloading win32 2.2.9...
Building package executables...
Built get_cli:get.
Installed executables get and getx.
Warning: Pub installs executables into $HOME/.pub-cache/bin, which is not on your path.
You can fix that by adding this to your shell's config file (.bashrc, .bash_profile, etc.):

export PATH="$PATH":"$HOME/.pub-cache/bin"

Activated get_cli 1.6.0.

设置环境变量 ​

一般Mac的环境变量都是通过根目录的.bash_profile进行环境变量设置。

#getX
export PATH="$PATH":"$HOME/.pub-cache/bin"

使设置的环境变量生效 ​

我们可以通过source 加上路径，对环境变量生效。

JMdeMacBook-Pro:~ jm$ source "/Users/jm/.bash_profile"

校验是否成功安装 ​

JMdeMacBook-Pro:~ jm$ get

List available commands:

  create:
    controller:  Generate controller
    page:  Use to generate pages
    project:  Use to generate new project
    provider:  Create a new Provider
    screen:  Generate new screen
    view:  Generate view
  generate:
    locales:  Generate translation file from json files
    model:  generate Class model from json
  help:  Show this help
  init:  generate the chosen structure on an existing project:
  install:  Use to install a package in your project (dependencies):
  remove:  Use to remove a package in your project (dependencies):
  sort:  Sort imports and format dart files
  update:  To update GET_CLI
  --version:  Shows the current CLI version'

Time: 1814 Milliseconds

Cli创建工程 ​

我们可以通过get create project来进行创建工程

JMdeMacBook-Pro:getx jm$ get create project

然后出现如下提示，我们选择创建Flutter Project

-->   1) Flutter Project
      2) Get Server

选择之后需要输入工程名称、公司域名、选择iOS语言、选择Android语言、是否空安全、是否校验，选完知道就会为我们开始创建工程。

JMdeMacBook-Pro:getx jm$ get create project
-->   1) Flutter Project
      2) Get Server
? what is the name of the project? getx_example
? What is your company's domain?  Example: com.yourcompany  com.jimi

what language do you want to use on ios?

      1) Swift
-->   2) Objective-C

what language do you want to use on android?

      1) Kotlin
-->   2) Java

Do you want to use null safe?

-->   1) Yes!
      2) No

do you want to use some linter?

      1) no
      2) Pedantic [Deprecated]
      3) Effective Dart [Deprecated]
-->   4) Dart Recommended

Running `flutter create /Users/jm/Desktop/Project/getx/getx_example` …

$ flutter create --no-pub -i objc -a java --org com.jimi /Users/jm/Desktop/Project/getx/getx_example
Creating project ....
  test/widget_test.dart (created)
  pubspec.yaml (created)
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Wrote 129 files.

All done!
In order to run your application, type:

  $ cd .
  $ flutter run

Your application code is in ./lib/main.dart.


Running `flutter pub get` …

$ flutter pub get
Running "flutter pub get" in getx_example...                       898ms
$ dart migrate --apply-changes --skip-import-check
Migrating /Users/jm/Desktop/Project/getx/getx_example

See https://dart.dev/book-go/null-safety-migration for a migration guide.

Analyzing project...
All sources appear to be already migrated.  Nothing to do.
✖  + HandshakeException: Connection terminated during handshake

✓  File: analysis_options.yaml created successfully at path: analysis_options.yaml
-->   1) GetX Pattern (by Kauê)
      2) CLEAN (by Arktekko)

Your lib folder is not empty. Are you sure you want to overwrite your application?
 WARNING: This action is irreversible

-->   1) Yes!
      2) No
✓  'Package: get installed!
✓  File: main.dart created successfully at path: lib/main.dart
✓  File: home_controller.dart created successfully at path: ./lib/app/modules/home/controllers/home_controller.dart
✓  File: home_view.dart created successfully at path: ./lib/app/modules/home/views/home_view.dart
✓  File: home_binding.dart created successfully at path: ./lib/app/modules/home/bindings/home_binding.dart
✓  File: app_routes.dart created successfully at path: lib/app/routes/app_routes.dart
✓  File: app_pages.dart created successfully at path: lib/app/routes/app_pages.dart
✓  home route created successfully.
✓  Home page created successfully.
✓  GetX Pattern structure successfully generated.

Running `flutter pub get` …

$ flutter pub get
Running "flutter pub get" in getx_example...                       968ms

Time: 53925 Milliseconds

如果能看到如上就证明通过Cli创建工程成功了

代码结构分析 ​

这个结构类似于mvc的思想，binding相当于m,controller就是c,view就是v

初始化出的项目data是空的，后续会使用到

Getx代码风格 ​

第一种：Getx_pattern ​

我们可以通过get create page:login来快速创建一个页面，这个页面有controller、view、binding、routes等配置，结构是Getx_pattern

JMdeMacBook-Pro:getx_example jm$ get create page:login
✓  File: login_controller.dart created successfully at path: ./lib/app/modules/login/controllers/login_controller.dart
✓  File: login_view.dart created successfully at path: ./lib/app/modules/login/views/login_view.dart
✓  File: login_binding.dart created successfully at path: ./lib/app/modules/login/bindings/login_binding.dart
✓  login route created successfully.
✓  Login page created successfully.

Time: 453 Milliseconds

JMdeMacBook-Pro:getx_example jm$

第二种：CLEAN ​

我们可以通过get create page:login来快速创建一个页面，这个页面有controller、view、binding、routes等配置，结构是CLEAN。

JMdeMacBook-Pro:getx_example jm$ get create screen:name
✓  File: name.controller.dart created successfully at path: ./lib/presentation/name/controllers/name.controller.dart
✓  File: name.screen.dart created successfully at path: ./lib/presentation/name/name.screen.dart
✓  File: name.controller.binding.dart created successfully at path: lib/infrastructure/navigation/bindings/controllers/name.controller.binding.dart
✓  File: routes.dart created successfully at path: lib/infrastructure/navigation/routes.dart
✓  File: routes.dart created successfully at path: lib/infrastructure/navigation/routes.dart
✓  name route created successfully.
✓  File: navigation.dart created successfully at path: lib/infrastructure/navigation/navigation.dart
✓  Name navigation added successfully.

Time: 482 Milliseconds

Cli创建页面 ​

get create page:news

Cli创建控制器 ​

我们可以通过get create controller:login来快速为已存在的page进行创建controller，并且他还重新了controller的生命周期以及初始化方法

get create controller:another on home
✓  File: another_controller.dart created successfully at path: ./lib/app/modules/home/controllers/another_controller.dart
✓  The Another has been added to binding at path: lib/app/modules/home/bindings/home_binding.dart'

Time: 387 Milliseconds

JMdeMacBook-Pro:getx_example jm$

Cli创建View ​

如果我们只是想单独创建一个View，那我们可以通过get create view:alogin on login来进行创建。

get create view:alogin on login
✓  File: alogin_view.dart created successfully at path: ./lib/app/modules/login/views/alogin_view.dart

Time: 378 Milliseconds

JMdeMacBook-Pro:getx_example jm$

Cli创建Provider ​

如果我们需要创建GetConnect，那我们可以通过get create provider:blogin on login来进行创建。

JMdeMacBook-Pro:getx_example jm$ get create provider:blogin on login
✓  File: blogin_provider.dart created successfully at path: ./lib/app/modules/login/providers/blogin_provider.dart

Time: 357 Milliseconds

JMdeMacBook-Pro:getx_example jm$

Cli创建国际化 ​

添加国际化文件 ​

在assets/locales文件夹下创建如下文件，并添加文件内容

zh_CN.json

{
    "buttons": {
        "login": "登陆",
        "register": "注册"
    }
}

en_US.json

{
    "buttons": {
        "login": "login",
        "register": "register"
    }
}

运行国际化命令 ​

如果我们需要对应用进行国际化配置，那我们可以通过get generate locales assets/locales来进行创建。

JMdeMacBook-Pro:getx_example jm$ get generate locales assets/locales
✓  File: locales.g.dart created successfully at path: lib/generated/locales.g.dart
✓  locale files generated successfully.

Time: 416 Milliseconds

JMdeMacBook-Pro:getx_example jm$

image

Cli通过json生成模型 ​

添加文件 ​

在assets下创建文件夹models，在models目录下创建news.json,并添加文件

{
    "stat": "1",
    "data": [
        {
            "uniquekey": "db61b977d9fabd0429c6d0c671aeb30e",
            "title": "“新时代女性的自我关爱”主题沙龙暨双山街道福泰社区妇儿活动家园启动仪式举行",
            "date": "2021-03-08 13:47:00",
            "category": "头条",
            "author_name": "鲁网",
            "url": "https://mini.eastday.com/mobile/210308134708834241845.html",
            "thumbnail_pic_s": "https://dfzximg02.dftoutiao.com/news/20210308/20210308134708_d0216565f1d6fe1abdfa03efb4f3e23c_0_mwpm_03201609.png",
            "thumbnail_pic_s02": "https://dfzximg02.dftoutiao.com/news/20210308/20210308134708_d0216565f1d6fe1abdfa03efb4f3e23c_1_mwpm_03201609.png",
            "thumbnail_pic_s03": "https://dfzximg02.dftoutiao.com/news/20210308/20210308134708_d0216565f1d6fe1abdfa03efb4f3e23c_2_mwpm_03201609.png",
            "is_content": "1"
        }
    ],
    "page": "1",
    "pageSize": "3"
}

运行生成模型命令 ​

第一种：不仅创建模型类，还会提供Provider ​

如果我们需要对某个json文件生成模型，那我们可以通过get generate model on home with assets/models/user.json来进行生成

JMdeMacBook-Pro:getx_example jm$ get generate model on home with assets/models/user.json
✓  File: user_model.dart created successfully at path: ./lib/app/modules/home/user_model.dart
✓  File: user_provider.dart created successfully at path: ./lib/app/modules/home/providers/user_provider.dart

Time: 499 Milliseconds

JMdeMacBook-Pro:getx_example jm$

第二种：只生成模型类 ​

JMdeMacBook-Pro:getx_example jm$ get generate model on login with assets/models/user.json --skipProvider
✓  File: user_model.dart created successfully at path: ./lib/app/modules/login/user_model.dart

Time: 408 Milliseconds

第三种：通过连接生成模型类 ​

JMdeMacBook-Pro:getx_example jm$ get generate model on home from "https://api.github.com/users/CpdnCristiano"
? Could not set the model name automatically, which name do you want to use? githubHome
✓  File: github_home_model.dart created successfully at path: ./lib/app/modules/home/github_home_model.dart
✓  File: github_home_provider.dart created successfully at path: ./lib/app/modules/home/providers/github_home_provider.dart

Time: 14033 Milliseconds

Cli安装包（dependencies) ​

第一种：直接安装最新版本 ​

JMdeMacBook-Pro:getx_example jm$ get install dio

Installing package "dio" …

✓  'Package: dio installed!

Running `flutter pub get` …

$ flutter pub get
Running "flutter pub get" in getx_example...                     2,656ms

Time: 5815 Milliseconds

第二种：同时安装多个包 ​

JMdeMacBook-Pro:getx_example jm$ get install path dio

Installing package "path" …

✓  'Package: path installed!

Installing package "dio" …

✓  'Package: dio installed!

Running `flutter pub get` …

$ flutter pub get
Running "flutter pub get" in getx_example...                       732ms

Time: 7146 Milliseconds

第三种：安装自定版本的包 ​

JMdeMacBook-Pro:getx_example jm$ get install prodiver:5.0.0

Installing package "prodiver" …

✓  'Package: prodiver installed!

Cli卸载包 ​

第一种：卸载某个安装包 ​

JMdeMacBook-Pro:getx_example jm$ get remove http

Removing package: "http"


Package: http is not installed in this application


Running `flutter pub get` …

$ flutter pub get
Running "flutter pub get" in getx_example...                       772ms

Time: 2641 Milliseconds

第二种：同时卸载多个包 ​

JMdeMacBook-Pro:getx_example jm$ get remove dio path

Removing package: "dio"

✓  Package: dio removed!

Removing package: "path"

✓  Package: path removed!

Running `flutter pub get` …

$ flutter pub get
Running "flutter pub get" in getx_example...                     1,085ms

Time: 3142 Milliseconds

Cli更新脚手架 ​

我们可以通过get update对脚手架进行更新

JMdeMacBook-Pro:getx_example jm$ get update

Latest version of get_cli already installed


Time: 3315 Milliseconds

Cli查看版本号 ​

我们可以通过get -v 查看当前脚手架的版本号

JMdeMacBook-Pro:getx_example jm$ get -v
░██████╗░███████╗████████╗   ░█████╗░██╗░░░░░░██╗
██╔════╝░██╔════╝╚══██╔══╝   ██╔══██╗██║░░░░░░██║
██║░░██╗░█████╗░░░░░██║░░░   ██║░░╚═╝██║░░░░░░██║
██║░░╚██╗██╔══╝░░░░░██║░░░   ██║░░██╗██║░░░░░░██║
╚██████╔╝███████╗░░░██║░░░   ╚█████╔╝███████╗ ██║
░╚═════╝░╚══════╝░░░╚═╝░░░   ░╚════╝░╚══════╝ ╚═╝

Version: 1.6.0

Time: 148 Milliseconds

Cli帮助 ​

当我们忘记了命令的使用方式，我们可以通过get help进行查看帮助。

JMdeMacBook-Pro:getx_example jm$ get help

List available commands:

  create:
    controller:  Generate controller
    page:  Use to generate pages
    project:  Use to generate new project
    provider:  Create a new Provider
    screen:  Generate new screen
    view:  Generate view
  generate:
    locales:  Generate translation file from json files
    model:  generate Class model from json
  help:  Show this help
  init:  generate the chosen structure on an existing project:
  install:  Use to install a package in your project (dependencies):
  remove:  Use to remove a package in your project (dependencies):
  sort:  Sort imports and format dart files
  update:  To update GET_CLI
  --version:  Shows the current CLI version'

Time: 94 Milliseconds

标准目录结构 ​

总结 ​

以上就是对Cli的脚手架命令的一个实践和总结，相对于自己手动创建结构，用Cli就可以很轻松的实现。

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