AXAccessQueue类在......和......中实现......将使用其中一个

Question

Xcode10运行一个空白项目.我选择Simulator iPhoneXR.控制台打印如下

Class AXAccessQueue is implemented in both...and...One of the two will be used.
Class AXAccessQueueTimer is implemented in both...and...One of the two will be used.
[AXMediaCommon] Unable to look up screen scale
[AXMediaCommon] Unexpected physical screen

我换了模拟器iPhone6.控制台打印

libMobileGestalt  MobileGestalt.c:890: MGIsDeviceOneOfType is not supported on this platform.

如何产生这种现象？以及如何解决问题？

我将很感激你的回答.