cocoapods問題Unable to add a source with url `https://github.com/CocoaPods/Specs.git` named `master-1`

終端中：pod install 後出現：

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`.

按照提示：pod repo add master https://github.com/CocoaPods/Specs.git

仍然不行，是由於安裝多個xcode致使路徑改變

解決： sudo xcode-select -switch 後面當前xcode路徑

pod update --no-repo-update

pod install --verbose --no-repo-update

便可成功。