当我的同事更改代码并将其提交到存储库时，我可以看到代码，但xCode编译好像他的贡献不在那里

Have any other iPhone developers experienced this phenomenon? I can see his contributions in xCode - I see for example my colleague has wrapped a navigation controller around one of my view controllers and added it to my tab bar. Great! That view really did call for a navigation controller and this is a welcome addition to the project.Have any other iPhone developers experienced th