ARCore SDK开发指南Step1 - CocoaPods安装

项目场景：

为执行AugmentedFacesSample 附带的预配置 ARCore SDK，需要依赖项CocoaPods运行安装，在按照官网安装过程中遇到如下问题：

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问题1

运行 sudo gem install cocoapods报错：

ERROR:  Error installing cocoapods:
	ERROR: Failed to build gem native extension.

解决方案：

换用brew安装，依次执行
cleanup -d -v
brew install cocoapods

如遇到以下报错信息：

==> `brew cleanup` has not been run in 30 days, running now...
Error: Permission denied @ apply2files - /usr/local/lib/docker/cli-plugins

执行brew unlink cocoapods && brew link cocoapods

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问题2

在Podfile所在AugmentedFacesExample目录文件下运行 pod install报错：

Analyzing dependencies
Cloning spec repo `trunk` from `https://cdn.cocoapods.org/`
[!] Unable to add a source with url `https://cdn.cocoapods.org/` named `trunk`.
You can try adding it manually in `/Users/aspen/.cocoapods/repos` or via `pod repo add`.

解决方案：

依次执行，即可完成ARCore SDK安装
pod repo add-cdn trunk https://cdn.cocoapods.org/
pod install

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此时，在Xcode项目AugmentedFacesSample所在的文件夹，产生一个*.xcworkspace文件，日后用于构建和运行应用程序。