问题出现原因:
从github上clone 的代码 pod install 之后出现了问题
diff: /../Podfile.lock: No such file or directory
diff: Manifest.lock: No such file or directory
error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.`
解决办法 删除掉工程中的.xcworkspace 文件 然后重新执行 pod install 就可以了