Sharing data between an iOS 8 share extension and main app

Question

Recently, I\'ve been making a simple iOS 8 share extension to understand how the system works. As Apple states in its App Extension Programming Guide:

<

Answer 1

Here is how I did it:

1. Open your main app target > Capabilities > App Groups set to on
2. Add a new app group and make sure it is ticked (e.g. group.com.seligmanventures.LightAlarmFree)
3. Open your watch target (the one with Capabilities tab) > App Groups set to on
4. Add a new app group and make sure it is ticked (e.g. group.com.seligmanventures.LightAlarmFree - but must be the same name as group above)

5. Save data to the group as follows:

   var defaults = NSUserDefaults(suiteName: "group.com.seligmanventures.LightAlarmFree")
   defaults?.setObject("It worked!", forKey: "alarmTime")
   defaults?.synchronize()
   

6. Retrieve data from the group as follows:

   var defaults = NSUserDefaults(suiteName: "group.com.seligmanventures.LightAlarmFree") 
   defaults?.synchronize()
   
   // Check for null value before setting
   if let restoredValue = defaults!.stringForKey("alarmTime") {
       myLabel.setText(restoredValue)
   }
   else {
       myLabel.setText("Cannot find value")
   }