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Preventing iOS to lock screen

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Is there way to prevent iOS automatically lock screen?

 

I'am my self using one fitness app and it stays visible when doing workout, so it should be possible.

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Posted (edited)

In Fmx this would look somewhat like this:

function  DoLocked(const ALock : Boolean) : Boolean;
var
    UIApp : UIApplication;
begin
    UIApp := TUIApplication.Wrap(TUIApplication.OCClass.sharedApplication);

    if ALock  then
    begin
        UIApp.setIdleTimerDisabled(True);    // aquire  wakelock
        Result := True;
    end
    else
    begin
        UIApp.setIdleTimerDisabled(False);  // release wakelock
        Result := False;
    end;
end;

I put some more functionality around that basic one, to make it workable on all platforms, and to avoid double-enabling,
but I removed that from the code above.

Edited by Rollo62
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