Reproduced by Xamarin Team @rolfbjarne with XCode 11 Beta 5 as part of #6740
I can still reproduce this on XCode 11 Beta 6.
A side-by-side view of Xib and .h/.m file would appear. I can then drag controls to create outlets.
Xcode throws up a warning. I see no .h/.m and instead get a copy of the raw XML of my xib file.

=== Visual Studio Community 2019 for Mac ===
Version 8.2.2 (build 44)
Installation UUID: 8fca8429-4d11-44ce-b2e0-8f55b711b92a
GTK+ 2.24.23 (Raleigh theme)
Xamarin.Mac 5.14.0.85 (d16-2-fix-mac-updates / 86973979)
Package version: 600000319
=== Mono Framework MDK ===
Runtime:
Mono 6.0.0.319 (2019-02/52203786470) (64-bit)
Package version: 600000319
=== NuGet ===
Version: 5.1.0.6013
=== .NET Core ===
Runtime: /usr/local/share/dotnet/dotnet
Runtime Versions:
2.1.12
2.1.11
2.1.9
2.1.8
2.1.7
2.1.2
2.1.1
2.0.5
2.0.0
SDK: /usr/local/share/dotnet/sdk/2.1.701/Sdks
SDK Versions:
2.1.701
2.1.700
2.1.505
2.1.504
2.1.503
2.1.302
2.1.301
2.1.4
2.0.0
MSBuild SDKs: /Library/Frameworks/Mono.framework/Versions/6.0.0/lib/mono/msbuild/Current/bin/Sdks
=== Xamarin.Profiler ===
Version: 1.6.11
Location: /Applications/Xamarin Profiler.app/Contents/MacOS/Xamarin Profiler
=== Updater ===
Version: 11
=== Apple Developer Tools ===
Xcode 11.0 (14921.5)
Build 11M392q
=== Xamarin.Mac ===
Version: 5.99.2.40 (Visual Studio Community)
Hash: d883febf
Branch: xcode11
Build date: 2019-08-06 08:33:41-0400
=== Xamarin.iOS ===
Version: 12.99.2.40 (Visual Studio Community)
Hash: d883febf
Branch: xcode11
Build date: 2019-08-06 08:33:40-0400
=== Xamarin Designer ===
Version: 16.2.0.401
Hash: a8111869d
Branch: remotes/origin/d16-2-xcode11
Build date: 2019-08-05 20:44:10 UTC
=== Xamarin.Android ===
Version: 9.4.1.0 (Visual Studio Community)
Commit: xamarin-android/d16-2/ebd65c9
Android SDK: /Users/ewan/Library/Developer/Xamarin/android-sdk-macosx
Supported Android versions:
None installed
SDK Tools Version: 26.1.1
SDK Platform Tools Version: 28.0.2
SDK Build Tools Version: 28.0.3
Build Information:
Mono: mono/mono/2019-02@e6f5369c2d2
Java.Interop: xamarin/java.interop/d16-2@d64ada5
LibZipSharp: grendello/LibZipSharp/d16-2@caa0c74
LibZip: nih-at/libzip/rel-1-5-1@b95cf3f
ProGuard: xamarin/proguard/master@905836d
SQLite: xamarin/sqlite/3.27.1@8212a2d
Xamarin.Android Tools: xamarin/xamarin-android-tools/d16-2@6f6c969
=== Microsoft Mobile OpenJDK ===
Java SDK: /Users/ewan/Library/Developer/Xamarin/jdk/microsoft_dist_openjdk_1.8.0.25
1.8.0-25
Android Designer EPL code available here:
https://github.com/xamarin/AndroidDesigner.EPL
=== Android Device Manager ===
Version: 1.2.0.58
Hash: d03e3ea
Branch: remotes/origin/d16-2~1
Build date: 2019-08-05 20:08:02 UTC
=== Xamarin Inspector ===
Version: 1.4.3
Hash: db27525
Branch: 1.4-release
Build date: Mon, 09 Jul 2018 21:20:18 GMT
Client compatibility: 1
=== Build Information ===
Release ID: 802020044
Git revision: 2be0fd83c12d2bf1d60b2e5413d8517b8779bb74
Build date: 2019-08-07 07:47:32+00
Build branch: release-8.2-xcode11
Xamarin extensions: 559d23bf0f48ccb83b732417a122fc66e0a2640a
=== Operating System ===
Mac OS X 10.15.0
Darwin 19.0.0 Darwin Kernel Version 19.0.0
Fri Aug 9 21:59:46 PDT 2019
root:xnu-6153.0.139.161.2~2/RELEASE_X86_64 x86_64
VS bug #968734
Still reproducable
=== Visual Studio Community 2019 for Mac ===
Version 8.3.2 (build 32)
Installation UUID: a5d6628b-e873-4dab-9514-ff7661767904
GTK+ 2.24.23 (Raleigh theme)
Xamarin.Mac 5.16.1.24 (d16-3 / 08809f5b)
Package version: 604000208
=== Mono Framework MDK ===
Runtime:
Mono 6.4.0.208 (2019-06/07c23f2ca43) (64-bit)
Package version: 604000208
=== NuGet ===
Version: 5.3.0.6192
=== .NET Core SDK ===
SDK: /usr/local/share/dotnet/sdk/3.0.100/Sdks
SDK Versions:
3.0.100
3.0.100-rc1-014190
2.2.300
2.2.204
2.2.203
2.2.106
2.2.106-old copy
2.1.701
2.1.505
MSBuild SDKs: /Library/Frameworks/Mono.framework/Versions/6.4.0/lib/mono/msbuild/Current/bin/Sdks
=== .NET Core Runtime ===
Runtime: /usr/local/share/dotnet/dotnet
Runtime Versions:
3.0.0
3.0.0-rc1-19456-20
2.2.5
2.2.4
2.1.13
2.1.12
2.1.9
=== Xamarin.Profiler ===
Version: 1.6.11.16
Location: /Applications/Xamarin Profiler.app/Contents/MacOS/Xamarin Profiler
=== Updater ===
Version: 11
=== Xamarin.Android ===
Version: 10.0.3.0 (Visual Studio Community)
Commit: xamarin-android/d16-3/4d45b41
Android SDK: /Users/artur.malendowicz/Library/Developer/Xamarin/android-sdk-macosx
Supported Android versions:
8.1 (API level 27)
SDK Tools Version: 26.1.1
SDK Platform Tools Version: 29.0.4
SDK Build Tools Version: 29.0.2
Build Information:
Mono: mono/mono/2019-06@5608fe0abb3
Java.Interop: xamarin/java.interop/d16-3@5836f58
LibZipSharp: grendello/LibZipSharp/d16-3@71f4a94
LibZip: nih-at/libzip/rel-1-5-1@b95cf3fd
ProGuard: xamarin/proguard/master@905836d
SQLite: xamarin/sqlite/3.27.1@8212a2d
Xamarin.Android Tools: xamarin/xamarin-android-tools/d16-3@cb41333
=== Microsoft Mobile OpenJDK ===
Java SDK: /Users/artur.malendowicz/Library/Developer/Xamarin/jdk/microsoft_dist_openjdk_1.8.0.25
1.8.0-25
Android Designer EPL code available here:
https://github.com/xamarin/AndroidDesigner.EPL
=== Android SDK Manager ===
Version: 1.4.0.65
Hash: c33b107
Branch: remotes/origin/d16-3
Build date: 2019-09-19 20:42:44 UTC
=== Android Device Manager ===
Version: 1.2.0.115
Hash: 724ea69
Branch: remotes/origin/d16-3
Build date: 2019-09-19 20:43:06 UTC
=== Xamarin Designer ===
Version: 16.3.0.247
Hash: 52eac1a9e
Branch: remotes/origin/d16-3
Build date: 2019-10-03 23:04:28 UTC
=== Apple Developer Tools ===
Xcode 11.1 (15405)
Build 11A1027
=== Xamarin.Mac ===
Xamarin.Mac not installed. Can't find /Library/Frameworks/Xamarin.Mac.framework/Versions/Current/Version.
=== Xamarin.iOS ===
Version: 13.2.0.47 (Visual Studio Community)
Hash: c2cbd3480
Branch: d16-3
Build date: 2019-09-30 22:37:32-0400
=== Xamarin Inspector ===
Version: 1.4.3
Hash: db27525
Branch: 1.4-release
Build date: Mon, 09 Jul 2018 21:20:18 GMT
Client compatibility: 1
=== Build Information ===
Release ID: 803020032
Git revision: cac56af22091d80a4c339532595ed90228d87eb0
Build date: 2019-10-04 06:43:01+00
Build branch: release-8.3
Xamarin extensions: 2fc34e1d5c594f52abf0e0e9e14f4945adec6c7f
=== Operating System ===
Mac OS X 10.14.4
Darwin 18.5.0 Darwin Kernel Version 18.5.0
Mon Mar 11 20:40:32 PDT 2019
root:xnu-4903.251.3~3/RELEASE_X86_64 x86_64
=== Enabled user installed extensions ===
Straight8's SpecFlow Integration 1.11.3.0
@rolfbjarne is there any workaround?
@artur-malendowicz-gain not as far as I know (except using the iOS Designer in Visual Studio for Mac instead).
You can open another editor pane in XCode and navigate to the header file for a xib to attach outlets.
XCode is a little buggy with this and VSMac doesn't always pickup the changes but we've been getting by using that.
I was having the same problem and I've found a workaround: go to Editor > Assistant and it should show the desired layout (two columns, one with the xib and the other with the .m/.h file). I've been able to create outlets again.
@oriolnoya Awesome thanks, it worked for me 馃憤
Most helpful comment
I was having the same problem and I've found a workaround: go to Editor > Assistant and it should show the desired layout (two columns, one with the xib and the other with the .m/.h file). I've been able to create outlets again.