Keith,

Thanks for the assist... In some cases a http call will open the mobile app if 
it's installed.  For example, https://m.facebook.com will launch the mobile 
app.  However, now with further testing, I have a new problem.  On android, if 
the app isn't installed it's not returning "no association".  The result is 
empty.  Must be a bug!  I'm using LC Business 9.6.2

Thank you!
-Dan
 

On 9/1/21, 10:36 AM, "use-livecode on behalf of Keith Martin via use-livecode" 
<use-livecode-boun...@lists.runrev.com on behalf of 
use-livecode@lists.runrev.com> wrote:

    Only one thought: the protocols that do work on iOS are general 
declarations that are routed to an app/service as the host OS thinks is 
appropriate. Less common ones and app-specific ones do have to be registered... 
in the app that wants to be able RECEIVE them. So if the FB app doesn’t have 
that set up already it seems it can’t be done.

    
https://developer.apple.com/documentation/xcode/defining-a-custom-url-scheme-for-your-app
 
<https://developer.apple.com/documentation/xcode/defining-a-custom-url-scheme-for-your-app>

    Would it work well enough to use a regular https URL to the resource on 
Facebook? It would open in the user’s browser, but it may be enough.

    k


    > On 1 Sep 2021, at 18:04, Dan Friedman via use-livecode 
<use-livecode@lists.runrev.com> wrote:
    > 
    > I need a little help here...
    > 
    > I am creating a mobile app for a client that wants to simply launch 
another app.  To do this, I am trying to use a custom url to launch an external 
app.  For example:
    > 
    > launch url "fb:"
    > 
    > This works fine on Android, but on iOS, I get "no association" (yes, 
Facebook is installed).  Then I read that you have to enter the Custom URLs you 
want to use in the "App URL Query Whitelist" area in the Application Builder.   
Is this true?   Why does the app have to know at compile time what URLs are 
going to be opened?  In my app's case, client can change and edit the list on a 
server, so the list of apps to launch are received by the our app at launch.
    > 
    > "mailto:";, "http:", "music:" and "tel:" all work just fine on iOS without 
being included in the App URL Query Whitelist.
    > 
    > Anyone have any insight to this process?
    > 
    > Thanks in advance!
    > -Dan
    > 
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