Remove the unexpected HDR effect on iOS Share Sheet when Dark Mode is off.

ShareSheetHDREffectRemover

//
//  ShareSheetHDREffectRemover.swift
//  MIT license
//
//  Copyright © 2022 Jonny Kuang (theSpringApp@gmail.com)
//

#if !targetEnvironment(macCatalyst)

/// Remove the unexpected HDR effect on iOS Share Sheet when Dark Mode is off.
enum ShareSheetHDREffectRemover {
    
    static let setup: Void = {
        swizzleInstanceMethod(
            class: UIVisualEffectView.self,
            originalSelector: #selector(UIVisualEffectView.didMoveToWindow),
            swizzledSelector: #selector(UIVisualEffectView.kjy_swizzle_removeShareSheetHDREffect_didMoveToWindow)
        )
    }()
}

private extension UIVisualEffectView {
    
    static let groupCellClass = NSClassFromString("UIActivityActionGroupCell") as? UIView.Type
    
    @objc func kjy_swizzle_removeShareSheetHDREffect_didMoveToWindow() {
        kjy_swizzle_removeShareSheetHDREffect_didMoveToWindow()
        
        guard let aClass = Self.groupCellClass,
              window != nil,
              kjy_findSuperview({ $0.isKind(of: aClass) }) != nil
        else {
            return
        }
        contentView.backgroundColor = UIColor {
            $0.userInterfaceStyle == .light ? .clear : .black
        }
    }
}
#endif