1. pod lib lint (检查本地pod)
[!] DemoPodSpecs did not pass validation, due to 2 warnings (but you can use --allow-warnings to ignore them).
You can use the --no-clean option to inspect any issue.
解决办法：用 pod lib lint --allow-warnings 命令
2. pod spec lint (检查远程pod)
Encountered an unknown error (Simulator is not available.) during validation.
解决办法：升级cocoapods “sudo gem install -n /usr/local/bin cocoapods --pre”
3. pod spec lint (检查远程pod)
[iOS] unknown: Encountered an unknown error (Must be in the root of the repo (/Users/*.cocoapods/repos/master), instead in ....
解决办法：可能是因为更新完Xcode以后Xcode路径更改了，Xcodebuild找不到路径。 执行命令 “sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer ”
4. pod repo push DemoPodSpecs DemoPodSpecs.podspec
The DemoPodSpecs.podspec specification does not validate.
解决办法：pod repo push DemoPodSpecs DemoPodSpecs.podspec --verbose --use-libraries --allow-warnings
5. pod repo push DemoPodSpecs DemoPodSpecs.podspec --verbose --use-libraries --allow-warnings
/usr/bin/git -C /Users/.cocoapods/repos/DemoPodSpecs -C
/Users/.cocoapods/repos/DemoPodSpecs push origin master
fatal: repository '' not found
解决办法：到 /Users/.cocoapods/目录下查看私有pod库是否存在
6. pod lib lint
[!] The validator for Swift projects uses Swift 3.0 by default, if you are using a different version of swift you can use a .swift-version file to set the version for your Pod. For example to use Swift 2.3, run: echo "2.3" > .swift-version.
解决办法：运行 echo 3.0 > .swift-version
