Git ignore UserInterfaceState.xcuserstate

1. 退出xcdoe， 打开终端（Terminal），进入到你的项目目录下

2. 在终端键入  git rm --cached [YourProjectName].xcodeproj/project.xcworkspace/xcuserdata/[YourUsername].xcuserdatad/UserInterfaceState.xcuserstate
3. 在终端键入  git commit -m "Removed file that shouldn't be tracked"

4. 在.gitignore文件中加入如下几行

1. *.xcuserstate
2. project.xcworkspace
3. xcuserdata
4. UserInterfaceState.xcuserstate
5. project.xcworkspace/
6. xcuserdata/
7. UserInterface.xcuserstate

5. 重新打开Xcode commit, push。