Open Radar

 
A user will often be presented with an UIActivityViewController but not know exactly what data they will be acting on when they choose an activity or a share extension. A perfect example is that long-pressing on a link, but not knowing exactly what URL they're about to share or copy is.

In Tumblr.app, we add a URL preview (screenshot attached) above our activity controllers, but this solution is A) non-standard, something that every developer would need to implement themselves, and B) fragile, likely to be broken in a future iOS release.

It would be great if there was a standardized way to do this that all apps could benefit from.

Steps to Reproduce:
Display a UIActivityViewController with an NSURL instance in the activity items array.

Expected Results:
Expect to see a preview of the URL. 

This could either be an API that allows developers to provide a custom preview view, or something that the OS does automatically for known data types like NSURL, NSString, UIImage, etc.

Actual Results:
No preview is shown to the user.