UIDesignRequiresCompatibility causes a desaturated HudBackgroundColor on iOS26

[richaplinvs]

🐛 Bug Report

The HudBackgroundColor is desaturated. The image below shows that setting all colours to red highlights the pink-ish background.

❓ Expected behavior

The HudBackgroundColor should be exactly as specified. With red being set for all colours you shouldn't be able to see any text or activity spinner.

🪜 Reproduction steps

ProgressHUDAppearance.HudBackgroundColor = UIColor.FromRGB(255, 0, 0);
ProgressHUDAppearance.HudTextColor = UIColor.Red;
ProgressHUDAppearance.RingColor = UIColor.Red;
BTProgressHUD.Show("Loading...", -1, MaskType.Black);

🛠 Configuration

Direct package reference.
.NET 9.0.306
"microsoft.net.sdk.ios": "26.0.9752/9.0.100"
UIDesignRequiresCompatibility = true

📦 Package Version:

📱 iOS Version:
iOS 26 but only when UIDesignRequiresCompatibility is true.

[Cheesebaron]

Interesting. So this is when you are using net9.0-ios26.0 target for your App and setting the Info.plist UIDesignRequiresCompatibility key?

I will have a look at what is causing this.

[Cheesebaron]

So BTProgressHud uses UIToolbar, and it appears like the behavior changed for how colors are blended.

I've opened #125 which switches to a plain UIView where you can supply your own background color and visual effects.

[richaplinvs]

Thanks Cheesebaron. Sounds like an upgrade!

[Cheesebaron]

@richaplinvs this is now released on NuGet, give it a go. On iOS 26 it defaults to Liquid Glass, but you can override the effects. Or if you want a solid color set the effect to null and provide a color.

Check the release note here: https://github.com/redth-org/BTProgressHUD/releases/tag/v2.3.0