CocoaPods系列：CocoaPods报错

报错一

• 错误信息

[!] Unable to add a source with url `https://github.com/CocoaPods/Specs.git` named `master`.
You can try adding it manually in `~/.cocoapods/repos` or via `pod repo add`.

• 解决方法

$ pod repo add master https://github.com/CocoaPods/Specs.git
//- 如果之后出现'pod setup'提示
$ pod setup
//- 如果pod setup不能解决问题
$ Git clone [https://git.coding.net/CocoaPods/Specs.git](https://git.coding.net/CocoaPods/Specs.git) ~/.cocoapods/repos/master

报错二

项目的Swift版本升级后，第三方库若没支持项目的Swift会出现报错

• 解决方法一
  Pods -> Targets -> SnapKit -> Build Settings -> Swift language version option 选择第三方库可以支持的版本

  
  
• 解决方法二

post_install do |installer|
  installer.pods_project.targets.each do |target|
    if ['SnapKit'].include? target.name
      target.build_configurations.each do |config|
        config.build_settings['SWIFT_VERSION'] = '4.2'
      end
    end
  end
end

SnapKit只是一个例子，换成项目中有问题的库即可
记得要保存然后pod install