ios的手势底层委托代码

ios/Runner/AppDelegate.swift

-import Flutter
 import UIKit
+import Flutter
 
 @main
 @objc class AppDelegate: FlutterAppDelegate {
+    
+  private var edgePanRecognizer: UIScreenEdgePanGestureRecognizer?
+  private var methodChannel: FlutterMethodChannel?
+
   override func application(
     _ application: UIApplication,
     didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
   ) -> Bool {
+
+    // 获取 root FlutterViewController 实例
+    guard let controller = window?.rootViewController as? FlutterViewController else {
+      fatalError("rootViewController is not a FlutterViewController")
+    }
+
+    // 注册插件
     GeneratedPluginRegistrant.register(with: self)
+
+    // 创建 MethodChannel，用于与 Flutter 通信
+    methodChannel = FlutterMethodChannel(
+      name: "ios_edge_swipe",
+      binaryMessenger: controller.binaryMessenger
+    )
+
+    methodChannel?.setMethodCallHandler { [weak self] (call, result) in
+      if call.method == "initSwipeListener" {
+        self?.setupEdgeSwipeGesture(controller: controller)
+        result(nil)
+      }
+    }
+
     return super.application(application, didFinishLaunchingWithOptions: launchOptions)
   }
+
+  // 添加边缘滑动手势识别器
+  private func setupEdgeSwipeGesture(controller: UIViewController) {
+    if edgePanRecognizer != nil {
+        return // 防止重复添加
+    }
+
+    edgePanRecognizer = UIScreenEdgePanGestureRecognizer(target: self, action: #selector(handleEdgeSwipe(_:)))
+    edgePanRecognizer?.edges = [.left] // 监听左边缘
+    edgePanRecognizer?.delegate = self
+
+    controller.view.addGestureRecognizer(edgePanRecognizer!)
+    print("✅ 左边缘滑动手势监听已添加")
+  }
+
+  // 触发时回调
+  @objc private func handleEdgeSwipe(_ gesture: UIScreenEdgePanGestureRecognizer) {
+    if gesture.state == .recognized {
+      methodChannel?.invokeMethod("onEdgeSwipe", arguments: nil)
+      print("👈 左边缘滑动检测到！已通知 Flutter")
+    }
+  }
 }
+
+// 可选：防止冲突的手势识别设置
+extension AppDelegate: UIGestureRecognizerDelegate {
+  func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
+    // 如果需要同时识别，比如与 WebView 的滚动手势共存
+    return true
+  }
+}
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