参考：
https://blog.csdn.net/gwh111/article/details/95071105
https://stackoverflow.com/questions/53379908/arkit-template-xcode-project-main-thread-checker-log-console
https://huang.sh/2019/07/使用coremotion时遇到main-thread-checker-ui-api-called-on-a-background-thread-uiapplication-applicationstate/
应该是ios的bug