点击AppKit showDefinition生成的释义视图时macOS应用崩溃求助

macOS应用调用AppKit的showDefinition(for:at)生成释义视图后，点击该视图会崩溃，崩溃日志错误信息：

Fault: deferNSXPCInvocationOntoMainThread_block_invoke caught NSInternalInconsistencyException '_CPSSetFrontProcessWithOptions failed due to CGError -606 4294966690 fffffda2 (appIsDaemon)'

已尝试的解决措施：

• 用DispatchQueue.main.async包裹相关代码
• 将DefinitionWindow设为全局变量手动控制生命周期
  但问题仍未解决。

开发环境：macOS 14.3.1、Xcode 15

可复现的完整代码（需在隐私设置中开启辅助功能权限）：

import Cocoa
import SwiftUI
import AppKit

class AppDelegate: NSObject, NSApplicationDelegate {
    func applicationDidFinishLaunching(_ notification: Notification) {
        NSEvent.addGlobalMonitorForEvents(matching: .keyDown) { [weak self] event in
            guard let self = self else { return }
            if event.modifierFlags.contains(.command) && event.charactersIgnoringModifiers == "c" {
                self.ShowWordDefinition()
            }
        }
        NSApp.servicesProvider = self
        NSApp.registerServicesMenuSendTypes([.string], returnTypes: [])
    }
    func ShowWordDefinition(){
        DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
            let attributedString = NSAttributedString(string:NSPasteboard.general.string(forType: .string)!)
            let DefinitionWindow = NSWindow(contentRect: NSRect(origin: .zero, size: NSSize(width: 1, height: 1)), styleMask: [.borderless], backing: .buffered, defer: false)
            // on the top
            DefinitionWindow.level = .floating
            let pointInWindow = NSPoint(x:0,y:0); //default value
            DefinitionWindow.contentView?.showDefinition(for: attributedString, at: pointInWindow)
            DefinitionWindow.orderFront(nil)
        }
    }
}
let delegate = AppDelegate()
let app = NSApplication.shared
app.delegate = delegate
app.run()

完整崩溃日志：

FAULT: deferNSXPCInvocationOntoMainThread_block_invoke caught NSInternalInconsistencyException '_CPSSetFrontProcessWithOptions failed due to CGError -606 4294966690 fffffda2 (appIsDaemon)' with backtrace (
"0 CoreFoundation __exceptionPreprocess + 176",
"1 libobjc.A.dylib objc_exception_throw + 60",
"2 CoreFoundation +[NSException exceptionWithName:reason:userInfo:] + 0",
"3 ViewBridge assertCGError + 80",
"4 ViewBridge -[NSRemoteView serviceWindowWouldActivate] + 724",
"5 CoreFoundation invoking + 148",
"6 CoreFoundation -[NSInvocation invoke] + 428",
"7 ViewBridge __deferNSXPCInvocationOntoMainThread_block_invoke + 120",
"8 ViewBridge __wrapBlockWithVoucher_block_invoke + 56",
"9 ViewBridge deferredBlockOpportunity_block_invoke_2 + 360",
"10 CoreFoundation CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK + 28",
"11 CoreFoundation __CFRunLoopDoBlocks + 356",
"12 CoreFoundation __CFRunLoopRun + 2440",
"13 CoreFoundation CFRunLoopRunSpecific + 608",
"14 HIToolbox RunCurrentEventLoopInMode + 292",
"15 HIToolbox ReceiveNextEventCommon + 648",
"16 HIToolbox _BlockUntilNextEventMatchingListInModeWithFilter + 76",
"17 AppKit _DPSNextEvent + 660",
"18 AppKit -[NSApplication(NSEventRouting) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 716",
"19 AppKit -[NSApplication run] + 476",
"20 try main + 160",
"21 dyld start + 2360"
)

崩溃根源是系统将你的应用识别为守护进程（Daemon），导致无法激活前端进程（CGError -606对应kCGErrorNotActivated，提示appIsDaemon）。以下是具体修复方案：

• 改用标准macOS App项目结构
  当前代码是直接运行NSApplication的命令行式逻辑，没有完整的App Bundle，系统会判定为非GUI应用。需创建标准的macOS App项目，将业务逻辑迁移到AppDelegate或SwiftUI生命周期框架中，确保应用有正常的GUI身份。

• 修正窗口使用方式
  临时创建的极小无边界窗口无法被系统正确识别为GUI窗口载体，建议直接使用应用的主窗口调用showDefinition：

  func ShowWordDefinition(){
      DispatchQueue.main.async {
          guard let text = NSPasteboard.general.string(forType: .string),
                let mainWindow = NSApp.mainWindow,
                let contentView = mainWindow.contentView else {
              return
          }
          let attributedString = NSAttributedString(string: text)
          // 转换鼠标位置到主窗口坐标系
          let mouseLocation = NSEvent.mouseLocation
          let windowPoint = contentView.convert(mouseLocation, from: nil)
          contentView.showDefinition(for: attributedString, at: windowPoint)
      }
  }
  

• 检查应用激活权限配置
  查看Info.plist，如果存在LSUIElement键且值为YES，会让应用后台运行无法激活前端，需移除该键或设为NO；同时确认辅助功能权限已正确生效。

• 优化全局事件监听的上下文
  全局键盘监控的回调执行上下文可能存在异常，建议改用应用内快捷键监听（如NSMenuItem绑定快捷键），或确保调用showDefinition时，应用主窗口已创建并处于可激活状态。

内容的提问来源于stack exchange，提问作者WOTMCCR