I am developing an app with a today extension. When I want to share the NSUserDefault data with widget, I went to set the app groups and it just showed that it failed to add app groups container to apple ID. I am using a free develop ID and the Xcode version is 7.3. Anyone knows how to fix this?? Quite annoying...Thank you sooooo much!
You need to be a part of the Apple Developer Program in order to make use of App Groups...