I found it! Please let me know if there's a better way to do this. If I don't call this method, it fixes MFMailComposeViewController and the mail dialog accepts input again. Unfortunately, now my main app window only takes up one corner of the screen on a 12.9 inch iPad.
-(void) changeScreenScaling
{
/*
Scaling up for iPads that are not 9.7 1024x768.
See also:
- https://forums.developer.apple.com/thread/36336
- https://forums.developer.apple.com/thread/78680
- https://developer.apple.com/design/human-interface-guidelines/ios/icons-and-images/launch-screen/
- https://developer.apple.com/ios/submit/
Note that the resolutions NOT mentioned in the Info.plist UILaunchImageMinimumOSVersion are automatically
scaled to 9.7" (1024x768) by the iOS. That usually works well, but for example the 11" has different aspect
ratio so it doesn't really work, an the 2018 12.9" has round corners/safe areas, so that doesn't scale well
either.
I'd leave them all to auto-scale anyway, but Apple mandated the proper 12.9" support starting March 2019.
So. Right now info.plist references 1024x768 and 1366x1024 (12.9" device), that way everything is
auto-scaled to 9.7", except for the 12.9" that we now handle ourselves (by doing the same scaling further
down this function).
The 11" on the other hand is not mandated yet, so we're leaving it out. It's a real pain because a different
aspect ratio would require change the control layout across the entire app.
As support for more resolutions is added, we be adding them to Info.plist UILaunchImageMinimumOSVersion
*/
CGSize screenSize = [UIScreen mainScreen].bounds.size;
CGFloat screenLength = MAX(screenSize.height, screenSize.width);
CGFloat scale = screenLength / 1024;
if (scale!=1)
{
CGAffineTransform tr = CGAffineTransformMakeScale(scale, scale);
self.window.transform = tr;
}
}
