在云中配置开发构建

安装 expo-dev-client 库

¥Install expo-dev-client library

要初始化我们的项目以进行开发构建，请在项目目录中执行 cd 并运行以下命令来安装库：

¥To initialize our project for a development build, let's cd inside our project directory and run the following command to install the library:

启动开发服务器

¥Start the development server

运行 npx expo start 来启动 开发服务器：

¥Run the npx expo start to start the development server:

此命令启动 Metro 打包程序。在终端窗口中，我们看到 QR 码，后跟 Metro waiting on... 和清单 URL：

¥This command starts the metro bundler. In the terminal window, we see the QR code followed by the Metro waiting on... and a manifest URL:

让我们注意安装 expo-dev-client 库的变化：

¥Let's notice the changes installing the expo-dev-client library:

• 清单 URL 包含 expo-development-client 以及应用方案

  ¥The manifest URL contains expo-development-client along with the app scheme

• 开发服务器现在用于开发构建（而不是 Expo Go）。

  ¥The development server now operates for a development build (instead of Expo Go).

由于我们没有在我们的设备或模拟器/模拟器上安装开发版本，因此我们还无法运行我们的项目。

¥Since we do not have a development build installed on one of our devices or an emulator/simulator, we can't run our project yet.

初始化开发构建

¥Initialize a development build

安装 EAS CLI

¥Install EAS CLI

我们需要安装 EAS 命令行接口 (CLI) 工具作为本地计算机的全局依赖。运行以下命令：

¥We need to install the EAS Command Line Interface (CLI) tool as a global dependency on our local machine. Run the following command:

登录或注册 Expo 账户

¥Log in or sign up for an Expo account

如果你有 Expo 账户并使用 Expo CLI 登录，请跳过此步骤。如果你没有 Expo 账户，请 在此注册 并继续执行下述登录命令。

¥If you have an Expo account and are signed in using Expo CLI, skip this step. If you don't have an Expo account, sign up here and proceed with the login command described below.

要登录，请运行以下命令：

¥To log in, run the following command:

此命令要求提供我们的 Expo 账户电子邮件或用户名和密码以完成登录。

¥This command asks for our Expo account email or username and password to complete the login.

初始化项目并将其链接到 EAS

¥Initialize and link the project to EAS

对于任何新项目，第一步是初始化并将其链接到 EAS 服务器。运行以下命令：

¥For any new project, the first step is to initialize and link it to the EAS servers. Run the following command:

运行时，此命令：

¥On running, this command:

• 通过输入我们的 Expo 账户凭据来请求验证账户所有者，并询问我们是否要创建新的 EAS 项目：

  ¥Requests verification of the account owner by entering our Expo account credentials and asks if we want to create a new EAS project:

  # Output after running eas init
  ✔ Which account should own this project? > your-username
  ✔ Would you like to create a project for @your-username/sticker-smash? … yes
  ✔ Created @your-username/sticker-smash
  ✔ Project successfully linked (ID: XXXX-XX-XX-XXXX) (modified app.json)
  

• 创建 EAS 项目并提供该项目的链接，我们可以在 Expo 仪表板中打开该链接：

  ¥Creates EAS project and provides a link to that project which we can open in the Expo dashboard:

• 生成唯一的 projectId 并将该 EAS 项目链接到我们开发计算机上的示例应用。

  ¥Generates a unique projectId and links this EAS project to the example app on our development machine.

• 修改 app.json 以包含 extra.eas.projectId 并使用创建的唯一 ID 更新其值。

  ¥Modifies app.json to include extra.eas.projectId and updates its value with the unique ID created.

{
  "extra": {
    "eas": {
      "projectId": "0cd3da2d-xxx-xxx-xxx-xxxxxxxxxx"
    }
  }
}

为 EAS 构建配置项目

¥Configure project for EAS Build

要为 EAS Build 设置我们的项目，请运行以下命令：

¥To set up our project for EAS Build, run the following command:

运行时，此命令：

¥On running, this command:

• 提示选择平台：Android、iOS 或全部。由于我们正在创建 Android 和 iOS 应用，因此我们选择“全部”。

  ¥Prompts to select a platform: Android, iOS, or All. Since we are creating Android and iOS apps, let's select All.

• 使用以下配置在项目目录的根目录中创建 eas.json：

  ¥Creates eas.json in the root of our project's directory with the following configuration:

{
  "cli": {
    "version": ">= 8.0.0"
  },

  "build": {
    "development": {
      "developmentClient": true,
      "distribution": "internal"
    },

    "preview": {
      "distribution": "internal"
    },

    "production": {}
  },

  "submit": {
    "production": {}
  }
}

这是新项目中 eas.json 的默认配置。它做了两件事：

¥This is the default configuration for eas.json in a new project. It does two things:

• 定义当前 EAS CLI 版本。

  ¥Defines the current EAS CLI version.

• 添加三个 建立档案：development、preview 和 production。

  ¥Adds three build profiles: development, preview, and production.