iOSProject.debug.xcconfig: unable to open file

[Shun Feng]

error: /Users/m/Developer/iOSProject-master/iOSProject/Pods/Target Support Files/Pods-iOSProject/Pods-iOSProject.debug.xcconfig: unable to open file (in target "iOSProject" in project "iOSProject") (in target 'iOSProject')

你好！打扰一下，想学习你的项目，这个要pod install么？一打开项目会出现这个，请问这是什么情况？