refactor: Tab view accessory compat

2026-01-09 19:46:22 +08:00
parent a7b1199fac
commit d542c2e52a
8 changed files with 181 additions and 264 deletions
@@ -0,0 +1,66 @@
+import SwiftUI
+
+#if os(iOS)
+    import UIKit
+
+    public extension View {
+        @ViewBuilder
+        func tabViewBottomAccessoryCompat<Content: View>(
+            isEnabled: Bool = true,
+            useSystemAccessory: Bool = true,
+            @ViewBuilder content: @escaping () -> Content
+        ) -> some View {
+            if isEnabled {
+                if #available(iOS 26.0, *), useSystemAccessory {
+                    tabViewBottomAccessory {
+                        content()
+                    }
+                } else {
+                    safeAreaInset(edge: .bottom, spacing: 0) {
+                        TabViewBottomAccessoryContainer(content: content)
+                    }
+                }
+            } else {
+                self
+            }
+        }
+
+    }
+
+    private struct TabViewBottomAccessoryContainer<Content: View>: View {
+        @ViewBuilder let content: () -> Content
+
+        var body: some View {
+            content()
+                .frame(maxWidth: .infinity)
+                .frame(height: TabViewBottomAccessoryMetrics.height)
+                .background(
+                    .bar,
+                    in: RoundedRectangle(
+                        cornerRadius: TabViewBottomAccessoryMetrics.cornerRadius,
+                        style: .continuous
+                    )
+                )
+                .padding(.horizontal, TabViewBottomAccessoryMetrics.horizontalPadding)
+                .padding(.top, TabViewBottomAccessoryMetrics.topPadding)
+                .padding(.bottom, TabViewBottomAccessoryMetrics.bottomPadding)
+        }
+    }
+
+    private enum TabViewBottomAccessoryMetrics {
+        static var height: CGFloat {
+            let toolbar = UIToolbar()
+            let size = toolbar.sizeThatFits(CGSize(width: UIScreen.main.bounds.width, height: 0))
+            return size.height > 0 ? size.height : 44
+        }
+
+        static var cornerRadius: CGFloat {
+            height * 0.5
+        }
+
+        static let horizontalPadding: CGFloat = 20
+        static let topPadding: CGFloat = 8
+        static let bottomPadding: CGFloat = 12
+
+    }
+#endif