Unable to look up screen scale and Unexpected physical screen orientation in Xcode 10

问题

I have recently updated Xcode to version 10, and now my console displays:

MyApp[1618:133310] [AXMediaCommon] Unable to look up screen scale
MyApp[1618:133310] [AXMediaCommon] Unexpected physical screen orientation
MyApp[1618:133310] [AXMediaCommon] Unable to look up screen scale
MyApp[1618:133310] [AXMediaCommon] Unable to look up screen scale
MyApp[1618:133310] [AXMediaCommon] Unexpected physical screen orientation

This only happens when I am running the app in the simulator. I have not changed my code since updating, and nothing appears to have broken in the app. What do these logs mean, and how can I resolve them?

回答1:

It could sounds dummy, but these warning appeared me after move the simulator previously rendered from the Macbook screen, to a wider external screen.

I solved it just restarting the simulator in the external screen. My 2 cents.

回答2:

I've met the same problem. Finally I find out that this is because I accidentally resize the simulator's screen using my mouse cursor. By quiting and restarting the simulator my problem is solved.

Hope the aforementioned information helps.

回答3:

This won't answer your original question, but it might relieve your eyes. A caveat to this answer however is that it disables all NSLog statements.

Do the following to suppress - all NSLog statements including - the warning: Unable to look up screen scale:

In Xcode, go to Product - Scheme - Edit Scheme, select 'Run' on the left side ...

... and add OS_ACTIVITY_MODE with value "disable" in the Environment variables section.

回答4:

Resizing the simulator's screen size to actual device size resolved this for me:

Cmd+1 is the shortcut.

回答5:

I got the issue, when I was running on iOS 12.2 and MacOS Majove (Version 10.14.4) Just change to iOS 11.4 and everything working perfectly.

回答6:

I encountered this issue after running some UITest from a gitlab-runner.

The simulator got into this state and the only way to solve it was to go to Hardware -> Erase all content and settings

回答7:

I've experienced something similar. If restarting simulator doesn't do the trick, check your UI test code. Make sure your setup calls super.setup() somewhere:

override func setup() {
    super.setup()
    // ....
}

来源：https://stackoverflow.com/questions/52410471/unable-to-look-up-screen-scale-and-unexpected-physical-screen-orientation-in-xco