Add iOS 26 liquid glass support to Apple Music alert views

  Both AlertAppleMusic16View and AlertAppleMusic17View now auto-upgrade
  their background to a tinted UIGlassEffect on iOS 26+, falling back to
  the existing blur material on older versions. A new
  init parameter lets callers opt out and keep the classic blur on iOS 26.

Author: eladdekel

README.md

@@ -109,6 +109,21 @@ alertView.titleLabel.font = UIFont.systemFont(ofSize: 21)
 alertView.titleLabel.textColor = .white
 ```
 
+### Liquid Glass (iOS 26+)
+
+On iOS 26 and later, both `AlertAppleMusic16View` and `AlertAppleMusic17View` automatically upgrade their background to a tinted `UIGlassEffect`. On older iOS versions they fall back to the original blur material, so no caller changes are required.
+
+If you want to opt out and force the classic blur on iOS 26+, pass `forceNonGlass: true` at construction time:
+
+```swift
+let alertView = AlertAppleMusic17View(title: "Added to Library", subtitle: nil, icon: .done, forceNonGlass: true)
+
+// also available on the iOS 16 style
+let alertView16 = AlertAppleMusic16View(title: "Added to Library", subtitle: nil, icon: .done, forceNonGlass: true)
+```
+
+The flag must be set at init — the background effect is built during initialisation, so a property change afterwards would have no effect.
+
 ## Present & Dismiss
 
 You can present and dismiss alerts manually via view.

Sources/AlertKit/Views/AlertAppleMusic16View.swift

@@ -11,6 +11,8 @@ public class AlertAppleMusic16View: UIView, AlertViewProtocol {
     public let titleLabel: UILabel?
     public let subtitleLabel: UILabel?
     public let iconView: UIView?
+
+    private let forceNonGlass: Bool
 
     public static var defaultContentColor = UIColor { trait in
         switch trait.userInterfaceStyle {
@@ -26,23 +28,36 @@ public class AlertAppleMusic16View: UIView, AlertViewProtocol {
     fileprivate var completion: (()->Void)? = nil
 
     private lazy var backgroundView: UIVisualEffectView = {
-        let view: UIVisualEffectView = {
+        let effect: UIVisualEffect = {
             #if !os(tvOS)
+            if #available(iOS 26, *), !forceNonGlass {
+                let glass = UIGlassEffect()
+                glass.tintColor = UIColor { trait in
+                    switch trait.userInterfaceStyle {
+                    case .dark: return UIColor.white.withAlphaComponent(0.12)
+                    default: return UIColor.black.withAlphaComponent(0.06)
+                    }
+                }
+                return glass
+            }
             if #available(iOS 13.0, *) {
-                return UIVisualEffectView(effect: UIBlurEffect(style: .systemThickMaterial))
+                return UIBlurEffect(style: .systemThickMaterial)
             } else {
-                return UIVisualEffectView(effect: UIBlurEffect(style: .light))
+                return UIBlurEffect(style: .light)
             }
             #else
-            return UIVisualEffectView(effect: UIBlurEffect(style: .light))
+            return UIBlurEffect(style: .light)
             #endif
         }()
+        let view = UIVisualEffectView(effect: effect)
         view.isUserInteractionEnabled = false
         return view
     }()
-    
-    public init(title: String? = nil, subtitle: String? = nil, icon: AlertIcon? = nil) {
-        
+
+    public init(title: String? = nil, subtitle: String? = nil, icon: AlertIcon? = nil, forceNonGlass: Bool = false) {
+
+        self.forceNonGlass = forceNonGlass
+
         if let title = title {
             let label = UILabel()
             label.font = UIFont.preferredFont(forTextStyle: .title2, weight: .bold)

Sources/AlertKit/Views/AlertAppleMusic17View.swift

@@ -12,6 +12,8 @@ public class AlertAppleMusic17View: UIView, AlertViewProtocol, AlertViewInternal
     public let titleLabel: UILabel?
     public let subtitleLabel: UILabel?
     public let iconView: UIView?
+
+    private let forceNonGlass: Bool
 
     public static var defaultContentColor = UIColor { trait in
         #if os(visionOS)
@@ -38,14 +40,29 @@ public class AlertAppleMusic17View: UIView, AlertViewProtocol, AlertViewInternal
         hostView.isUserInteractionEnabled = false
         return hostView
         #else
-        let view = UIVisualEffectView(effect: UIBlurEffect(style: .systemMaterial))
+        let effect: UIVisualEffect
+        if #available(iOS 26, *), !forceNonGlass {
+            let glass = UIGlassEffect()
+            glass.tintColor = UIColor { trait in
+                switch trait.userInterfaceStyle {
+                case .dark: return UIColor.white.withAlphaComponent(0.12)
+                default: return UIColor.black.withAlphaComponent(0.06)
+                }
+            }
+            effect = glass
+        } else {
+            effect = UIBlurEffect(style: .systemMaterial)
+        }
+        let view = UIVisualEffectView(effect: effect)
         view.isUserInteractionEnabled = false
         return view
         #endif
     }()
 
-    public init(title: String? = nil, subtitle: String? = nil, icon: AlertIcon? = nil) {
-        
+    public init(title: String? = nil, subtitle: String? = nil, icon: AlertIcon? = nil, forceNonGlass: Bool = false) {
+
+        self.forceNonGlass = forceNonGlass
+
         if let title = title {
             let label = UILabel()
             label.font = UIFont.preferredFont(forTextStyle: .body, weight: .semibold, addPoints: -2)