关于 flutter Xcode debug 出现 Main Thread Checker: UI API called on a background thread

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