解决

使用.gitignore文件避免每次clean项目需要重新commit文件（XX.xcodeproj/project.xcworkspace/xcuserdata/XX.xcuserdatad/UserInterfaceState.xcuserstate），但是没有效果，网上查到需要执行：

git rm --cached XX.xcodeproj/project.xcworkspace/xcuserdata/XX.xcuserdatad/UserInterfaceState.xcuserstate

git commit -m "Removed file that shouldn't be tracked"

 

同时，在.gitignore文件中加入如下几行：

*.xcuserstate

project.xcworkspace

xcuserdata

UserInterfaceState.xcuserstate 

project.xcworkspace/

xcuserdata/

UserInterface.xcuserstate