pod 组件验证常见错误

第一、Encountered an unknown error (Could not find a ios simulator…)

执行pod lib lint --allow-warnings 报错：

- ERROR | [iOS] unknown: Encountered an unknown error (Could not find a `ios` simulator (valid values: com.apple.coresimulator.simruntime.ios-12-2, com.apple.coresimulator.simruntime.tvos-12-2, com.apple.coresimulator.simruntime.watchos-5-2). Ensure that Xcode -> Window -> Devices has at least one `ios` simulator listed or otherwise add one.) during validation.

解决方法：
升级CocoaPods：sudo gem install cocoapods

升级之后再执行：pod lib lint --allow-warnings 就成功啦

brucedeMacBook-Pro:YExtentions bruceyao$ pod lib lint --allow-warnings

 -> YExtentions (0.1.0)
    - WARN  | [iOS] swift: The validator used Swift `4.0` by default because no Swift version was specified. To specify a Swift version during validation, add the `swift_versions` attribute in your podspec. Note that usage of a `.swift-version` file is now deprecated.
    - NOTE  | xcodebuild:  note: Using new build system
    - NOTE  | [iOS] xcodebuild:  note: Planning build
    - NOTE  | [iOS] xcodebuild:  note: Constructing build description

YExtentions passed validation.//验证通过

第二、[!] XXX did not pass validation, due to 2 warnings (but you can use --allow-warnings to ignore them).

有两个警告，其实这行警告可以不用管所以执行命令用：

pod lib lint --allow-warnings //允许有警告

第三、- ERROR | [iOS] xcodebuild: Returned an unsuccessful exit code. You can use --verbose for more information.

这个错误有可能是你配置：s.frameworks = ‘UIKit’, ‘MapKit’
框架写的有问题:去掉错误的框架

第四、[!] Unable to accept duplicate entry for: 工程名 (0.1.0)

版本号问题，我们更改版本号,例如更改 YYExtensions.podspec 修改为版本号 0.1.1,然后终端中重新提交版本信息

第五、There was an error pushing a new version to trunk: getaddrinfo: nodename nor servname provided, or not known

原因是你没有执行提交版本号的方法,直接推送到 git，
方法重新提交git

git add .
git commit -am 'XXX'
//第一次提交用：
git remote add origin https://github.com/xxxx/XXX.git
git push -u origin master

//打标签
git tag '0.1.0'
git push origin --tags
git tag //查看