Cocopods pod install警告记录

xxxx % pod install
Analyzing dependencies
Downloading dependencies
Generating Pods project
Integrating client project
Pod installation complete! There are 2 dependencies from the Podfile and 2 total pods installed.

[!] The Podfile does not contain any dependencies.

[!] The platform of the target `ScanDemo` (iOS 10.0) may not be compatible with `SGQRCode (4.1.0)` which has a minimum requirement of iOS 11.0.

[!] Your project does not explicitly specify the CocoaPods master specs repo. Since CDN is now used as the default, you may safely remove it from your repos directory via `pod repo remove master`. To suppress this warning please add `warn_for_unused_master_specs_repo => false` to your Podfile.

中文解释如下：
Analyzing dependencies — 分析依赖项
Downloading dependencies — 下载依赖项
Generating Pods project — 生成Pods项目
Integrating client project — 集成客户端项目

Pod安装完成！从Podfile中没有发现任何依赖项，共安装了2个Pods。

[!] Podfile文件中没有任何依赖项。

[!] 项目’ ScanDemo ’ (iOS 10.0)的平台可能与具有iOS 11.0最低要求的’ SGQRCode(4.1.0) '不兼容。

[!] 您的项目没有明确指定CocoaPods主规格库存储库。由于CDN现在是默认设置，您可以通过pod repo remove master安全地从repos目录中删除它。要抑制此警告，请在您的Podfile中添加warn_for_unused_master_specs_repo => false。