Update: src/get-started/install/macos

Author: AmosHuKe

src/_includes/docs/install/compiler/xcode.md

@@ -6,22 +6,35 @@
 
 ### Configure Xcode
 
+### 配置 Xcode
+
 To develop Flutter apps for {{os}}, install Xcode to compile to native bytecode.
 
+要为 {{os}} 开发 Flutter 应用，
+请安装 Xcode，以便编译为原生字节码。
+
 1. To configure the command-line tools to use the installed version of Xcode,
    run the following commands.
 
+   请运行以下命令，
+   来配置命令行工具使用已安装的 Xcode 版本。
+
     ```terminal
     {{prompt1}} sudo sh -c 'xcode-select -s /Applications/Xcode.app/Contents/Developer && xcodebuild -runFirstLaunch'
     ```
 
    To use the latest version of Xcode, use this path.
    If you need to use a different version, specify that path instead.
 
+   使用以上路径来配置使用最新版本的 Xcode，
+   如果你需要使用其他版本，请自行指定该路径。
+
 {% if target=="mobile-ios" %}
 
 1. To install the iOS Simulator, run the following command.
 
+   请运行以下命令，来安装 iOS 模拟器。
+
     ```terminal
     {{prompt1}} xcodebuild -downloadPlatform iOS
     ```
@@ -30,25 +43,34 @@ To develop Flutter apps for {{os}}, install Xcode to compile to native bytecode.
 
 1. Sign the Xcode license agreement.
 
+   签署 Xcode 许可证协议。
+
     ```terminal
     {{prompt1}} sudo xcodebuild -license
     ```
 
 Try to keep to the current version of Xcode.
 
+请尽量使用最新版本的 Xcode。
+
 {% if target=="mobile-ios" %}
 
 ### Configure your target iOS device
 
+### 配置目标 iOS 设备
+
 With Xcode, you can run Flutter apps on an iOS device or on the simulator.
 
+通过使用 Xcode，
+你可以在 iOS 真机设备或模拟器上运行 Flutter 应用。
+
 {% comment %} Nav tabs {% endcomment -%}
 <ul class="nav nav-tabs" id="ios-devices-vp" role="tablist">
     <li class="nav-item">
-        <a class="nav-link active" id="virtual-tab" href="#virtual" role="tab" aria-controls="virtual" aria-selected="true">Virtual Device</a>
+        <a class="nav-link active" id="virtual-tab" href="#virtual" role="tab" aria-controls="virtual" aria-selected="true">虚拟设备</a>
     </li>
     <li class="nav-item">
-        <a class="nav-link" id="physical-tab" href="#physical" role="tab" aria-controls="physical" aria-selected="false">Physical Device</a>
+        <a class="nav-link" id="physical-tab" href="#physical" role="tab" aria-controls="physical" aria-selected="false">真机设备</a>
     </li>
 </ul>
 
@@ -73,31 +95,53 @@ With Xcode, you can run Flutter apps on an iOS device or on the simulator.
 
 ### Install CocoaPods
 
+### 安装 CocoaPods
+
 If your apps depend on [Flutter plugins][] with native {{os}} code,
 install [CocoaPods][cocoapods].
 This program bundles various dependencies across Flutter and {{os}} code.
 
+如果你的应用程序依赖于带有原生 {{os}} 代码的 [Flutter 插件][Flutter plugins]，
+请安装 [CocoaPods][cocoapods]。
+该程序会捆绑 Flutter 和 {{os}} 代码之间的各种依赖关系。
+
 To install and set up CocoaPods, run the following commands:
 
+请运行以下步骤，安装并设置 CocoaPods：
+
 1. Install `cocoapods` following the
    [CocoaPods install guide][cocoapods].
 
+   按照 [CocoaPods 安装指南][cocoapods]
+   安装 `cocoapods`。
+
    ```terminal
    $ sudo gem install cocoapods
    ```
 1. Launch your preferred text editor.
 
+   启动你喜欢的文本编辑器。
+
 1. Open the Zsh environmental variable file `~/.zshenv` in your text editor.
 
+   在文本编辑器中打开 Zsh 环境变量文件 `~/.zshenv`。
+
 1. Copy the following line and paste it at the end of your `~/.zshenv` file.
 
+   复制以下内容并粘贴到 `~/.zshenv` 文件内的末尾。
+
    ```conf
    export PATH=$HOME/.gem/bin:$PATH
    ```
 
 1. Save your `~/.zshenv` file.
 
+   保存 `~/.zshenv` 文件。
+
 1. To apply this change, restart all open terminal sessions.
 
+   请重新启动所有打开的终端会话窗口，
+   来应用此更改。
+
 [Flutter plugins]: {{site.url}}/packages-and-plugins/developing-packages#types
 [cocoapods]: https://guides.cocoapods.org/using/getting-started.html#installation