仅在 iOS 17 设备以下遇到错误“线程 1：EXC_BAD_ACCESS（代码 = 1，地址 = 0x0）”

我刚刚将 XCode 更新到版本 15，遇到此错误（仅限 17 以下的 iOS 版本）

Thread 1: EXC_BAD_ACCESS (code=1, address=0x0)

显示此错误的代码（PathMonitorConectivityProvider.swift）：

当我从 XCode 运行代码时（iOS 设备版本是 iOS 16.4），以下代码中出现异常。

import Foundation
import Network

@available(iOS 12, *)
public class PathMonitorConnectivityProvider: NSObject, ConnectivityProvider {

  private let queue = DispatchQueue.global(qos: .background)

  private var _pathMonitor: NWPathMonitor?

  public var currentConnectivityType: ConnectivityType {
    let path = ensurePathMonitor().currentPath
    // .satisfied means that the network is available
    if path.status == .satisfied {
      if path.usesInterfaceType(.wifi) {
        return .wifi
      } else if path.usesInterfaceType(.cellular) {
        return .cellular
      } else if path.usesInterfaceType(.wiredEthernet) {
        // .wiredEthernet is available in simulator
        // but for consistency it is probably correct to report .wifi
        return .wifi
      } else if path.usesInterfaceType(.other) {
        return .other
      }
    }
    return .none
  }

  public var connectivityUpdateHandler: ConnectivityUpdateHandler?

  override init() {
    super.init()
    _ = ensurePathMonitor()
  }

  public func start() {
    _ = ensurePathMonitor()
  }

  public func stop() {
    _pathMonitor?.cancel()
    _pathMonitor = nil
  }

  @discardableResult
  private func ensurePathMonitor() -> NWPathMonitor {
    if (_pathMonitor == nil) {
      let pathMonitor = NWPathMonitor()
      pathMonitor.start(queue: queue)
      pathMonitor.pathUpdateHandler = pathUpdateHandler
      _pathMonitor = pathMonitor
    }
    return _pathMonitor!
  }

  private func pathUpdateHandler(path: NWPath) {
    connectivityUpdateHandler?(currentConnectivityType)
  }
}

错误的屏幕截图

另外 Flutter doctor 结果：

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.13.4, on macOS 13.5.2 22G91 darwin-x64, locale en-LK)
[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.1)
[✓] Xcode - develop for iOS and macOS (Xcode 15.0)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2022.1)
[✓] IntelliJ IDEA Community Edition (version 2022.3.2)
[✓] VS Code (version 1.82.2)
[✓] Connected device (4 available)
[✓] Network resources

• No issues found!

另外AppDelegate.swift：

import UIKit
import Flutter
import GoogleMaps

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
    GMSServices.provideAPIKey("AIzaSyB0SHZK3ngwOu0r26fm3pOrhKumXS7XdHY")
    GeneratedPluginRegistrant.register(with: self)
    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }
}

解决方案是升级 Pods 项目上的所有库，包括Flutter from IOS Deployment Target 11.0到版本12.0或更高。 由于某些原因，XCode 15 会将所有版本降级到 9.0 或 11.0，这将导致您的项目混乱并出现类似这样的奇怪错误。