Sent to the compose view after the post animation finishes.
- iOS 8.0+
- macOS 10.10+
By default, this method calls the completeRequestReturningItems: method of the associated
extension property, passing
nil in the
items array and a
nil expiration handler. You must override
did to perform the post of
content and any attachments. In your implementation of this method, you can call
super to take advantage of the default completion handler; if you don’t call
super, you must call the completion method of the extension context.