Copying plist to App Group Container - iOS 8 - plist

Question

I am adding an App Group to my app for sharing a single plist between the app and the watch. I used to copy a plist from the bundle to Documents for when the app first started up. But with the watch I am now trying to convert it to save to the container but it always seems to be empty. The targets have app group enabled, and I am using the right name in my code. What could be going wrong?
Old Way
// COPY PLIST TO DOCUMENTS
NSFileManager *fileManger=[NSFileManager defaultManager];
NSError *error;
NSArray *pathsArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
NSString *doumentDirectoryPath=[pathsArray objectAtIndex:0];
NSString *destinationPath= [doumentDirectoryPath stringByAppendingPathComponent:#"badger.com.vacations.plist"];
NSLog(#"plist path %#",destinationPath);
if (![fileManger fileExistsAtPath:destinationPath]){
NSString *sourcePath=[[[NSBundle mainBundle] resourcePath]stringByAppendingPathComponent:#"badger.com.vacations.plist"];
[fileManger copyItemAtPath:sourcePath toPath:destinationPath error:&error];
}
New way - not working
// COPY PLIST TO CONTAINER
NSURL *containerURL = [[NSFileManager defaultManager] containerURLForSecurityApplicationGroupIdentifier:#"group.com.xxxxx.xxx.container"];
containerURL = [containerURL URLByAppendingPathComponent:#"name.com.data.plist"];
NSString *destinationPath= containerURL.path;
NSLog(#"destinationPath %#", containerURL);
NSString *sourcePath=[[[NSBundle mainBundle] resourcePath]stringByAppendingPathComponent:#"name.com.data.plist"];
[fileManger copyItemAtPath:sourcePath toPath:containerURL.path error:&error];

Answer 1

You can´t share a plist as a file (or I simply don´t know about this feature), instead you just generate a new NSUserDefaults instance, which is shareable between targets.
Have a look here:
https://devforums.apple.com/message/977151#977151
or the Apple documentation
https://developer.apple.com/library/prerelease/ios/documentation/General/Conceptual/ExtensibilityPG/ExtensionScenarios.html
In the Apple Member Center, under 'Identifiers > App Groups' register a new App Group (e.g. group.de.myApp.sharedGroup)
In the Apple Member Center, under 'Identifiers > App IDs' refresh your App Ids for the targets that need sharing to use the App Groups feature
Regenerate all needed Provisioning Profiles and get them into Xcode
Back to Xcode: Under 'Capabilities' in each of your targets that need to share data, set 'App Groups' to on and add the previously registered App group.
Talk to the shareable NSUserDefaults container like this:
Store stuff:
NSUserDefaults *groupDefaults = [[NSUserDefaults alloc] initWithSuiteName:#"group.de.myApp.sharedGroup"];
[groupDefaults setInteger:1337 forKey:#"testEntry"];
[groupDefaults synchronize];
Read stuff:
NSUserDefaults *groupDefaults = [[NSUserDefaults alloc] initWithSuiteName:#"group.de.myApp.sharedGroup"];
NSInteger testEntry = [groupDefaults integerForKey:#"testEntry"];
NSLog(#"testEntry: %ld", (long)testEntry);