Why is the attachments property for UNNotificationContent an array as opposed to a single UNNotificationAttachment? It appears that only the first attachment is used as a preview in Notification Center...
Are additional attachments only useful as a way of passing along metadata to a custom VC interface, or does it serve some other purpose? The documentation specifies that multiple attachments can be specified but isn't clear as to their purpose.
you can force touch on these notifications. I know when you attach a video and force touch... it plays the video.
So I'd guess when you attach multiple media items, it must show the rest "inside"