iOS notification app goes into background doesn't seem to work

[Mark Smith]

Graham, I think there might be a problem. I just re-enabled this code in one of my applications and the only thing I am seeing is the WillResignActiveNotification message, and not the DidBecomeActiveNotification message. Odd also because it is the exact opposite of what you are seeing, so we are both seeing half of the story, just not the same half :) I’ll keep it enabled and see if I can spot any patterns. 

Mark


> On Nov 20, 2020, at 9:48 PM, Graham Samuel via use-livecode <use-livecode at lists.runrev.com> wrote:
> 
> Thanks Mark
> 
> I tried exactly your suggestion. For me, the second notification appears exactly as you say, but the first one doesn’t. It’s likely that I made a silly mistake but I can’t see what it is. I put other stuff in the log, so it’s not just a case of the text being overwritten. Obviously the app does go into the background, since it is detected coming back to the foreground. This test was on the Xcode simulator, but I got essentially the same results on a real iPhone.
> 
> Strange.
> 
> Graham
> 
> 
>> On 20 Nov 2020, at 17:21, Mark Smith <marksmithhfx at gmail.com> wrote:
>> 
>> Hi Graham, you can put something like the following in your handlers and then check the log file to see when they were activated.  If you're using Xcode you can download your “sandbox”  to your device. You’ll find the log file in there. 
>> put the long time && "UIApplicationWillResignActiveNotification detected" & return after url ("file:" & specialFolderPath("documents") & "/log.txt")
>> 
>> for example…
>> 
>> 10:39:05 AM UIApplicationWillResignActiveNotification detected in Stack Script
>> 10:57:23 AM UIApplicationDidBecomeActiveNotification detected in Stack Script
>> 
>> 
>> 
>> 
>>> On Nov 20, 2020, at 3:23 PM, Graham Samuel via use-livecode <use-livecode at lists.runrev.com <mailto:use-livecode at lists.runrev.com>> wrote:
>>> 
>>> Thanks to Mark Smith and Henry Lowe, I know that I’m supposed to set up mergNotify for two notifications as below.
>>> 
>>> I believe I’ve done this, and I’ve set a monitoring action (putting a text into a field) to show that these notifications have happened.
>>> 
>>> Of course it may be just me, but so far, I only seem to get the notification when the app comes back into the foreground (so logically it must have gone the background first),  but I just don’t get the ‘going in to the background' notification, or at least my monitoring doesn’t work.  Is there some trick of timing that I’ve missed?
>>> 
>>> Graham
>>> 
>>> 
>>>> On 17 Nov 2020, at 20:07, HENRY LOWE via use-livecode <use-livecode at lists.runrev.com <mailto:use-livecode at lists.runrev.com>> wrote:
>>>> 
>>>> <Thanks to Panos for this tip:>
>>>> 
>>>> On iOS use mergNotify as below. Works well for me.
>>>> 
>>>> on openStack
>>>> mergNotify "UIApplicationWillResignActiveNotification"
>>>> mergNotify "UIApplicationDidBecomeActiveNotification"
>>>> end openStack
>>>> 
>>>> on UIApplicationWillResignActiveNotification pUserInfo
>>>> // Your code before the app goes to background
>>>> -- your code here to handle going to the background
>>>> end UIApplicationWillResignActiveNotification
>>>> 
>>>> on UIApplicationDidBecomeActiveNotification pUserInfo
>>>> // Your code after the app comes back to foreground
>>>> -- your code here to handle your app becoming active
>>>> end UIApplicationDidBecomeActiveNotification
>>>> 
>>>> Henry
>>> 
>>>> On 17 Nov 2020, at 23:39, Mark Smith via use-livecode <use-livecode at lists.runrev.com <mailto:use-livecode at lists.runrev.com>> wrote:
>>>> 
>>>> And just a reminder that, under iOS, you’ll have to register to receive a “ UIApplicationWillResignActiveNotification” message, and then write a handler to respond to that (PS only register once in your stack script — I learned the hard way). It’s documented under mergNotify in the dictionary (with credit to Elanor for pointing this out to me when my “on shutdownRequest” handlers were being ignored). 
>>>> 
>>>> Jacque, I believe this is what you are looking for to be notified when you go into the background. I do some db cleanup at that time and it seems to work.
>>>> 
>>>> Mark
>>> 
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