防止 MacO 和 Windows 中的屏幕截图和屏幕录制 - Flutter 桌面应用程序

Question

your_flutter_project/macos/Runner/AppDelegate.swift

`import Cocoa
import FlutterMacOS

@NSApplicationMain
class AppDelegate: FlutterAppDelegate {
  
  override func applicationDidFinishLaunching(_ aNotification: Notification) {
    let controller: FlutterViewController = mainFlutterWindow?.contentViewController as! FlutterViewController
    let screenshotBlockerChannel = FlutterMethodChannel(name: "screenshot_blocker", binaryMessenger: controller.engine.binaryMessenger)
    
    screenshotBlockerChannel.setMethodCallHandler { (call: FlutterMethodCall, result: @escaping FlutterResult) in
      if call.method == "disableScreenshots" {
        self.disableScreenshots(result: result)
      } else if call.method == "enableScreenshots" {
        self.enableScreenshots(result: result)
      } else {
        result(FlutterMethodNotImplemented)
      }
    }
    
    super.applicationDidFinishLaunching(aNotification)
  }

  // Disable Screenshots Logic
  private func disableScreenshots(result: FlutterResult) {
    if let window = mainFlutterWindow {
      // Setting the security level for the window
      window.sharingType = .none  // Disable window sharing (prevents some forms of screen capture)
      result(true)
    } else {
      result(FlutterError(code: "UNAVAILABLE", message: "Window not available", details: nil))
    }
  }

  // Enable Screenshots Logic (restore default behavior)
  private func enableScreenshots(result: FlutterResult) {
    if let window = mainFlutterWindow {
      // Restore window sharing behavior
      window.sharingType = .readWrite
      result(true)
    } else {
      result(FlutterError(code: "UNAVAILABLE", message: "Window not available", details: nil))
    }
  }
}

`

import 'package:flutter/services.dart';
class ScreenshotBlocker {
  static const MethodChannel _channel = MethodChannel('screenshot_blocker');
  // Method to disable screenshots
  static Future<void> disableScreenshots() async {
    try {
      await _channel.invokeMethod('disableScreenshots');
    } on PlatformException catch (e) {
      print("Failed to disable screenshots: '${e.message}'.");
    }
  }
  // Method to enable screenshots (undo prevention)
  static Future<void> enableScreenshots() async {
    try {
      await _channel.invokeMethod('enableScreenshots');
    } on PlatformException catch (e) {
      print("Failed to enable screenshots: '${e.message}'.");
    }
  }
}

  @override
  void initState() {
    super.initState();
  
    // To disable screenshots
    ScreenshotBlocker.disableScreenshots();
   
  }

我应该在哪里同时阻止截图和屏幕录制？目前，屏幕截图防护工作正常，但我还需要限制 macOS 和 Windows 桌面应用程序上的屏幕录制。提供的代码适用于 macOS。如果您也有适用于 Windows 的解决方案，请分享适用于这两个平台的解决方案。

提前致谢！

Answer 1

更新 AppDelegate.swift：

private func restrictScreenRecording() {
    guard let window = mainFlutterWindow else { return }
    window.sharingType = .none
}

override func applicationDidFinishLaunching(_ aNotification: Notification) {
    let controller: FlutterViewController = mainFlutterWindow?.contentViewController as! FlutterViewController
    let screenshotBlockerChannel = FlutterMethodChannel(name: "screenshot_blocker", binaryMessenger: controller.engine.binaryMessenger)

    screenshotBlockerChannel.setMethodCallHandler { (call: FlutterMethodCall, result: @escaping FlutterResult) in
        if call.method == "disableScreenshots" {
            self.disableScreenshots(result: result)
            self.restrictScreenRecording()
        } else if call.method == "enableScreenshots" {
            self.enableScreenshots(result: result)
        } else {
            result(FlutterMethodNotImplemented)
        }
    }

    super.applicationDidFinishLaunching(aNotification)
}

首先适用于Windows 在 Windows 项目中创建一个新的 C++ 文件 (ScreenBlocker.cpp)：

#include <Windows.h>
#include <flutter/flutter_view_controller.h>

void DisableScreenRecording() {
    
    SetProcessDPIAware();
}

然后修改现有的 Flutter Windows 集成：

在您的 Runner.cpp 中，将这些函数集成到您现有的方法通道设置中：

void MethodChannelHandler(const std::string& method) {
    if (method == "disableScreenshots") {
        DisableScreenRecording();
    }
}