问题
I'm running an app on my iOS device but, in Instruments, that device is greyed out.
This also means I can't attach the process (Cant launch iOS app with Instruments on device). Is it anything to do with my earlier question: Instruments > Profile - Revoke and request
Xcode: 6.1.1 iOS: 7.1.2
Any idea why?
回答1:
I only had to reboot my phone (not my Mac), and then the error went away (Xcode 9.2, iPhone X running 11.2.6).
回答2:
i was having this issue and resolved it by
- Unplugging my device
- Turning my device off
- Rebooted my mac
- Turned device back on and plugged into computer after logging back in.
now it shows up in instruments. I tried unplugging device, restarting xcode, but that didn't work. rebooting everything is what did the trick for me.
回答3:
I met the this problem. Xcode(Version 9.3.1 (9E501)), iphone 7, And I forcely quit the Instrument. It's work
回答4:
I came across same problem today on xcode7.2.1, iOS 9.2.1, iPhone 6Sp. Resolved by rebooted my mac, my watch and the iPhone.
回答5:
If your workspace contains several projects and/or several targets, it seems that XCode doesn't know which binary to profile.
Just Edit your scheme -> Profile -> Choose an Executable and it should enable the profiling option.
回答6:
I don't know which process helped but I force quit AppleMobileDeviceHelper and DTServiceHub in the Activity Monitor and then it started working again (I was able to select my phone without rebooting).
回答7:
Recently, I confronted the question again on Xcode Version 10.1 (10B61), iphone 7 and Mac 10.14.1 (18B75). I resolved it by upgrading the deployment from 8.0 to 10.1. In fact, I have meet many strange Xcode bugs caused by the version, liking this one(xcode gpu shader profiler)
来源：https://stackoverflow.com/questions/28913801/instruments-device-grayed-out