fix(ios): 修复分享面板并同步互动栏布局断言

ios/Runner/AppDelegate.swift

@@ -386,15 +386,29 @@ final class PipShadowCoordinator: NSObject, AVPictureInPictureControllerDelegate
       guard call.method == "shareText",
             let arguments = call.arguments as? [String: Any],
             let text = arguments["text"] as? String,
-            !text.isEmpty,
-            let controller = self?.window?.rootViewController else {
+            !text.isEmpty else {
         result(FlutterError(code: "share_unavailable", message: "Share sheet is unavailable", details: nil))
         return
       }
-      let activity = UIActivityViewController(activityItems: [text], applicationActivities: nil)
-      activity.popoverPresentationController?.sourceView = controller.view
-      activity.completionWithItemsHandler = { _, _, _, _ in result(nil) }
-      controller.present(activity, animated: true)
+      DispatchQueue.main.async {
+        guard let controller = self?.sharePresenter() else {
+          result(FlutterError(code: "share_unavailable", message: "Share sheet is unavailable", details: nil))
+          return
+        }
+        let activity = UIActivityViewController(activityItems: [text], applicationActivities: nil)
+        if let popover = activity.popoverPresentationController {
+          popover.sourceView = controller.view
+          popover.sourceRect = CGRect(
+            x: controller.view.bounds.midX,
+            y: controller.view.bounds.midY,
+            width: 0,
+            height: 0
+          )
+          popover.permittedArrowDirections = []
+        }
+        activity.completionWithItemsHandler = { _, _, _, _ in result(nil) }
+        controller.present(activity, animated: true)
+      }
     }
 
     let thumbnailChannel = FlutterMethodChannel(
@@ -459,6 +473,34 @@ final class PipShadowCoordinator: NSObject, AVPictureInPictureControllerDelegate
     }
   }
 
+  /// 当前前台 Scene 的根控制器之上，最适合展示系统分享面板的控制器。
+  private func sharePresenter() -> UIViewController? {
+    let keyWindow = UIApplication.shared.connectedScenes
+      .compactMap { $0 as? UIWindowScene }
+      .first { $0.activationState == .foregroundActive }?
+      .windows.first { $0.isKeyWindow }
+    guard let rootController = keyWindow?.rootViewController else { return nil }
+    let presenter = topPresentedController(from: rootController)
+    guard presenter.viewIfLoaded?.window != nil else { return nil }
+    return presenter
+  }
+
+  /// 解析已展示页面、导航栈和标签页中的当前可见控制器。
+  private func topPresentedController(from controller: UIViewController) -> UIViewController {
+    if let presented = controller.presentedViewController {
+      return topPresentedController(from: presented)
+    }
+    if let navigation = controller as? UINavigationController,
+       let visible = navigation.visibleViewController {
+      return topPresentedController(from: visible)
+    }
+    if let tabs = controller as? UITabBarController,
+       let selected = tabs.selectedViewController {
+      return topPresentedController(from: selected)
+    }
+    return controller
+  }
+
   /// iOS 画中画：影子播放器通道，与 Android 共用同一 channel 名。
   private func registerPipChannel(_ engineBridge: FlutterImplicitEngineBridge) {
     let channel = FlutterMethodChannel(