iOS dark mode

[andrew at midwestcoastmedia.com]

Thank you Trevor! Adding this to my info.plist opted out of Dark Mode:
<key>UIUserInterfaceStyle</key>
	<string>Light</string>

Apple's ominous note at the end of that article gives me the  
impression that before too long (iOS 14?) this override will get the  
app rejected:
"Supporting Dark Mode is strongly encouraged. Use the  
UIUserInterfaceStyle key to opt out only temporarily while you work on  
improvements to your app's Dark Mode support."

--Andrew Bell



> Date: Wed, 4 Dec 2019 14:46:10 -0600
> From: Trevor DeVore <lists at mangomultimedia.com>
> To: How to use LiveCode <use-livecode at lists.runrev.com>
> Subject: Re: iOS dark mode
>
> On Wed, Dec 4, 2019 at 2:30 PM Andrew Bell via use-livecode <
> use-livecode at lists.runrev.com> wrote:
>
>> Is there a way to determine if an iOS device has dark mode ("Dark
>> Appearance") enabled from within a LiveCode app?
>>
>> The inherited default text color of a field is black, but is changed
>> to white by the OS when this mode is enabled (on a white background in
>> this case which makes it appear invisible). This seems to only affect
>> native mobile text fields, but not LC text fields.
>>
>> There is a feature enhancement to support dark mode for macOS, but I
>> didn't see any reports for iOS.
>> https://quality.livecode.com/show_bug.cgi?id=22221
>>
>> I'm not asking for an engine change, just curious if there is a way to
>> check this so I can code around it. Perhaps mergNotify?
>>
>
> I don't know of a way to check this from within LiveCode using existing
> tools. There is an API for checking which is documented here:
>
> https://developer.apple.com/documentation/uikit/uitraitcollection/1651063-userinterfacestyle?language=objc
>
> It should be possible to wrap that API using LiveCode Builder. From what
> I've read, I think you also need to respond to a trailCollectionDidChange
> message in case the user changes the setting while your app is open:
>
> https://developer.apple.com/documentation/uikit/uitraitenvironment/1623516-traitcollectiondidchange?language=objc
>
> The easier (temporary) solution would be to tell the OS to use light
> appearance for your app. It looks like there is an Info.plist key that you
> can add which will force your app to use the light appearance. Perhaps that
> will help in your situation?
>
> https://developer.apple.com/documentation/xcode/supporting_dark_mode_in_your_interface/choosing_a_specific_interface_style_for_your_ios_app?language=objc#3234550
>
> --
> Trevor DeVore
> ScreenSteps
> www.screensteps.com
>