问题
I just updated my iPhone to iOS 14.2.
When I want to launch an app on the device from Xcode, I now keep seing this:
I also just updated Xcode to Version 12.1, hoping it would solve the problem, but it doesn't make any difference, I keep getting the same message.
Obviously I tried disconnecting and reconnecting the device, but to no avail.
I also removed all the data under ~/Library/Developer/Xcode/DerivedData/, but again with no effect.
It seems like some other people have had this issue before, but I didn't find any working solution for me.
I hope someone with a recent similar experience can point me in the right direction for a proper way to solve this problem.
回答1:
Go to this Github repo iOS 14.2 Device Support File and download 14.2.zip file directly and after unzip it
And just copy and paste unzipped folder by path:
Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/Restart the Xcode
That's all. You can build and go on your project :)
If you need visually solution check out this answer: https://stackoverflow.com/a/64854525/14531220
Why we have done these steps ? : Because Xcode 12.1 doesn’t include support for 14.2 so we implemented its device support files for 14.2.
https://developer.apple.com/documentation/xcode-release-notes/xcode-12_1-release-notes
回答2:
The latest version of Xcode in the AppStore doesn’t include support for 14.2. You can download a beta of the next version from the Apple Developer website that supports 14.2, or wait for the AppStore version to be updated.
回答3:
Per the official post from Apple, devices running iOS 14.2 are only supported in Xcode 12.2 RC. (source: https://developer.apple.com/documentation/ios-ipados-release-notes/ios-ipados-14_2-release-notes)
You can download beta versions of Xcode via: https://developer.apple.com/download/
来源：https://stackoverflow.com/questions/64736953/iphone-is-not-available-please-reconnect-the-device-ios-14-2-xcode-12-1