ClassKit entitlement support for Xcode 9.4

[dalexsoto]

Steps to Reproduce

Xcode 9.4 introduced ClassKit entitlement

From Entitlements.plist:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>com.apple.developer.ClassKit-environment</key>
	<string>development</string>
</dict>
</plist>

According to documentation (see Optionally Test in Production Mode section) it has two possible values:

• development
• production

Expected Behavior

Have support for com.apple.developer.ClassKit-environment entitlement.

Workaround

1. Manually add com.apple.developer.ClassKit-environment entitlement to your Entitlements.plist file manually as shown above in the xml code section.
2. Enable the automatic provisioning profiles as explained here https://blog.xamarin.com/even-easier-ios-app-provisioning-visual-studio-mac/
3. Go to Apple developer portal and head to Certificates, Identifiers & Profiles section.
4. Inside the portal click on Identifiers > Apps IDs section.

5. Look for your App bundle Id, it should be prefixed with **VS** plus the bundle identifier inside your info.plist (In our example it is `VS com xamarin GreatPlays`) and click the edit button in the lower right.

6. Enable `ClassKit` and hit `Done`.

7. Now you should be able to go back to VS4Mac and deploy to your device.

[olegoid]

@dalexsoto
https://github.com/xamarin/md-addins/pull/3124

[olegoid]

The widget will be released with the next stable release of Visual Studio Mac. Closing the issue for now. All further related progress will be tracked in this VSTS task:

https://devdiv.visualstudio.com/DevDiv/_workitems/edit/604982