mergDocCanOpen opens iOS sharing menu

[Monte Goulding]

Hi Ralf

It might be that `mergDocCanOpen` needs to be deprecated as it relied on a hack and Apple must have changed the behavior. Checking the result after `mergDocShow*` commands will still report if the document interaction controller was able to be shown for the document.

Cheers

Monte

> On 13 May 2020, at 4:07 am, Ralf Bitter via use-livecode <use-livecode at lists.runrev.com> wrote:
> 
> Seems there is an issue with mergDocCanOpen(). Whenever this function
> is called the iOS sharing menu shows up for a short moment at the top
> of the screen. I am running LC 9.6.0 (rc1) and iOS SDK 13.2. The particular
> script including this function worked fine in earlier versions.
> 
> Does anybody have a recipe to avoid this undesirable behavior?
> 
> Ralf
> 
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