Context acquisition

loadContent.m

- (void)loadView {
  [super loadView];
	
  //this is to retrieve from the app group
  NSUserDefaults *bucket = [[NSUserDefaults alloc] initWithSuiteName:appGroupName];

  // assign your member values

  [self loadContext]; 
}

- (void)loadContext
{
	NSExtensionContext *context = self.extensionContext;
	NSExtensionItem *item = [context.inputItems firstObject];

	m_contextText = self.contentText;
	@try
	{
		NSArray *attachments = item.attachments;
		[attachments enumerateObjectsUsingBlock:^(NSItemProvider *provider, NSUInteger idx, BOOL *stop)
		 {
			 if ([provider hasItemConformingToTypeIdentifier:URL_IDENTIFIER])
			 {
				 [provider
						loadItemForTypeIdentifier:URL_IDENTIFIER
						options:nil
						completionHandler: ^(NSURL *item, NSError *error) {
							m_contextUrl = item;
						}];
			 }
			 else if ([provider hasItemConformingToTypeIdentifier:IMAGE_IDENTIFIER])
			 {
				 [provider
					loadItemForTypeIdentifier:IMAGE_IDENTIFIER
					options:nil
					completionHandler: ^(id<NSSecureCoding> item, NSError *error) {
						NSData *imgData;
						
						if([(NSObject*)item isKindOfClass:[NSURL class]])
							imgData = [NSData dataWithContentsOfURL:(NSURL*)item];
						
						if([(NSObject*)item isKindOfClass:[UIImage class]])
							imgData = UIImagePNGRepresentation((UIImage*)item);
						
						[m_contextImgData addObject:imgData];
					}];
			 }
			 else if ([provider hasItemConformingToTypeIdentifier:(NSString *)kUTTypePlainText])
			 {
				 [provider
						loadItemForTypeIdentifier:(NSString *)kUTTypePlainText
						options:nil
						completionHandler: ^(id<NSSecureCoding> item, NSError *error) {
							m_contextText = (NSString *)item;
						}];
			 }
		 }
		 ];
	}
	@catch (NSException *exception)
	{
	}
}