1.删除仓库中跟踪的UserInterfaceState.xcuserstate

    git rm --cached iamhere/IAmHere.xcodeproj/project.xcworkspace/xcuserdata/hayden.xcuserdatad/UserInterfaceState.xcuserstate

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

    git push

2.忽略UserInterfaceState.xcuserstate，在仓库根目录下：

    vim ./.git/info/exclude

    然后按“i”进入编辑模式，将UserInterfaceState.xcuserstate追加到文件末尾，注意要填写项目相对路径