Use of undelcared identifier 'UIUserInterfaceIdiomMac' [iOS]

Summary

I’m facing Intent Redirection issue that discussed here. Someone has created PR to resolve that issue, hopefully. But, that PR had not been released as official release version. So, I point react-native-device-info on package.json to master branch of this repo to get that changes.

Unfortunately, I got this error below when I built my app.

Duplicate case value 'UIUserInterfaceIdiomPad'
---
Use of undeclared identifier 'UIUserInterfaceIdiomMac'; did you mean 'UIUserInterfaceIdiomPad'?
Replace 'UIUserInterfaceIdiomMac' with 'UIUserInterfaceIdiomPad'

on RNDeviceInfo.m

- (DeviceType) getDeviceType
{
    switch ([[UIDevice currentDevice] userInterfaceIdiom]) {
        case UIUserInterfaceIdiomPhone: return DeviceTypeHandset;
        case UIUserInterfaceIdiomPad: return TARGET_OS_MACCATALYST ? DeviceTypeDesktop : DeviceTypeTablet;
        case UIUserInterfaceIdiomTV: return DeviceTypeTv;
        case UIUserInterfaceIdiomMac: return DeviceTypeDesktop;
        default: return DeviceTypeUnknown;
    }
}

This issue didn’t appear on 7.3.1 version. Seems, it was related to this changes https://github.com/react-native-device-info/react-native-device-info/pull/1137

Version	master https://github.com/react-native-device-info/react-native-device-info/commit/9f286d724be1041ec4816c677ff2fff713115f07
Affected OS	iOS
Xcode Version	11.7
Variant	debug
OS Version	?

Current behavior

Failed to build

Expected behavior

Succeed to build

[todorone]

xcode 12 is not compatible with react native?

I did not say exactly this, probably RN is compatible with XCode 12, but not all dependencies are up to date. When i tried to migrate my production project month ago there were couple of annoying XCode-related issues with compilation to different targets(XC 12 is not backward compatible) and I almost sure not all of them are sorted out. So my point was that requirement to upgrade to XC 12 is breaking change for some not-hello-world projects.

Thanks once again for prompt reaction!

[mikehardy]

Interesting, for me was the opposite, I needed Xcode 12 immediately in order to continue submitting to App Store because we were touching APIs that had ios14-specific requirements. But that’s software - everyone’s situation is different. Good luck with your project!