https://blog.wongcw.com/2018/10/24/ios-12-1%e5%b0%86%e4%bf%ae%e5%a4%8diphone-xs-xr%e7%9b%b8%e6%9c%bahdr%e7%be%8e%e9%a2%9c%e9%97%a8%e9%97%ae%e9%a2%98/