iOS Flutter 应用不请求权限，返回权限状态未知

Question

我正在使用 permission_handler 4.4.0（最新更新）插件来处理移动设备上的权限，该插件在 android 设备上完美运行，但是当我尝试在 iOS 上请求权限时，它不会在设备上显示权限弹出并返回权限状态未知。我认为它可能会丢失在 info.plist 或 pod 文件中，但我跟踪并仔细检查了这两个文件，但我没有发现任何错误，但如果有人在文件中发现任何丢失或错误的内容，我上传了该文件的代码。请查看代码并让我知道您的建议。在此先感谢各位。

info.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>CFBundleDevelopmentRegion</key>
    <string>$(DEVELOPMENT_LANGUAGE)</string>
    <key>CFBundleExecutable</key>
    <string>$(EXECUTABLE_NAME)</string>
    <key>CFBundleIdentifier</key>
    <string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
    <key>CFBundleInfoDictionaryVersion</key>
    <string>6.0</string>
    <key>CFBundleName</key>
    <string>driverapp</string>
    <key>CFBundlePackageType</key>
    <string>APPL</string>
    <key>CFBundleShortVersionString</key>
    <string>$(FLUTTER_BUILD_NAME)</string>
    <key>CFBundleSignature</key>
    <string>????</string>
    <key>CFBundleVersion</key>
    <string>$(FLUTTER_BUILD_NUMBER)</string>
    <key>LSRequiresIPhoneOS</key>
    <true/>
    <key>UILaunchStoryboardName</key>
    <string>LaunchScreen</string>
    <key>UIMainStoryboardFile</key>
    <string>Main</string>
    <key>UISupportedInterfaceOrientations</key>
    <array>
        <string>UIInterfaceOrientationPortrait</string>
        <string>UIInterfaceOrientationLandscapeLeft</string>
        <string>UIInterfaceOrientationLandscapeRight</string>
    </array>
    <key>UISupportedInterfaceOrientations~ipad</key>
    <array>
        <string>UIInterfaceOrientationPortrait</string>
        <string>UIInterfaceOrientationPortraitUpsideDown</string>
        <string>UIInterfaceOrientationLandscapeLeft</string>
        <string>UIInterfaceOrientationLandscapeRight</string>
    </array>
    <key>UIViewControllerBasedStatusBarAppearance</key>
    <false/>
    <key>io.flutter.embedded_views_preview</key>
    <true/>
    <!-- Permission options for the `location` group -->
    <key>NSLocationWhenInUseUsageDescription</key>
    <string>Need Location for Route Map and AppMarker Jobs</string>
    <key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
    <string>Need Location for Patrolling and AppMarker Jobs</string>
    <key>NSLocationUsageDescription</key>
    <string>Need Location for Patrolling and AppMarker Jobs</string>
    <key>NSLocationAlwaysUsageDescription</key>
    <string>Need Location for Patrolling feature</string>
    <key>PermissionGroupNotification</key>
    <string>To show the notifications</string>
</dict>
</plist>

播客文件

# Uncomment this line to define a global platform for your project
 platform :ios, '10.0'

# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
ENV['COCOAPODS_DISABLE_STATS'] = 'true'

project 'Runner', {
  'Debug' => :debug,
  'Profile' => :release,
  'Release' => :release,
}

def parse_KV_file(file, separator='=')
  file_abs_path = File.expand_path(file)
  if !File.exists? file_abs_path
    return [];
  end
  generated_key_values = {}
  skip_line_start_symbols = ["#", "/"]
  File.foreach(file_abs_path) do |line|
    next if skip_line_start_symbols.any? { |symbol| line =~ /^\s*#{symbol}/ }
    plugin = line.split(pattern=separator)
    if plugin.length == 2
      podname = plugin[0].strip()
      path = plugin[1].strip()
      podpath = File.expand_path("#{path}", file_abs_path)
      generated_key_values[podname] = podpath
    else
      puts "Invalid plugin specification: #{line}"
    end
  end
  generated_key_values
end

target 'Runner' do
  # Flutter Pod

  copied_flutter_dir = File.join(__dir__, 'Flutter')
  copied_framework_path = File.join(copied_flutter_dir, 'Flutter.framework')
  copied_podspec_path = File.join(copied_flutter_dir, 'Flutter.podspec')
  unless File.exist?(copied_framework_path) && File.exist?(copied_podspec_path)
    # Copy Flutter.framework and Flutter.podspec to Flutter/ to have something to link against if the xcode backend script has not run yet.
    # That script will copy the correct debug/profile/release version of the framework based on the currently selected Xcode configuration.
    # CocoaPods will not embed the framework on pod install (before any build phases can generate) if the dylib does not exist.

    generated_xcode_build_settings_path = File.join(copied_flutter_dir, 'Generated.xcconfig')
    unless File.exist?(generated_xcode_build_settings_path)
      raise "Generated.xcconfig must exist. If you're running pod install manually, make sure flutter pub get is executed first"
    end
    generated_xcode_build_settings = parse_KV_file(generated_xcode_build_settings_path)
    cached_framework_dir = generated_xcode_build_settings['FLUTTER_FRAMEWORK_DIR'];

    unless File.exist?(copied_framework_path)
      FileUtils.cp_r(File.join(cached_framework_dir, 'Flutter.framework'), copied_flutter_dir)
    end
    unless File.exist?(copied_podspec_path)
      FileUtils.cp(File.join(cached_framework_dir, 'Flutter.podspec'), copied_flutter_dir)
    end
  end

  # Keep pod path relative so it can be checked into Podfile.lock.
  pod 'Flutter', :path => 'Flutter'

  # Plugin Pods
  pod 'Firebase/Analytics'
  pod 'Firebase/Database'
  # Prepare symlinks folder. We use symlinks to avoid having Podfile.lock
  # referring to absolute paths on developers' machines.
  system('rm -rf .symlinks')
  system('mkdir -p .symlinks/plugins')
  plugin_pods = parse_KV_file('../.flutter-plugins')
  plugin_pods.each do |name, path|
    symlink = File.join('.symlinks', 'plugins', name)
    File.symlink(path, symlink)
    pod name, :path => File.join(symlink, 'ios')
  end
end

# Prevent Cocoapods from embedding a second Flutter framework and causing an error with the new Xcode build system.
install! 'cocoapods', :disable_input_output_paths => true

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '10.0'
      config.build_settings['ENABLE_BITCODE'] = 'NO'


      # You can remove unused permissions here
      # for more infomation: https://github.com/BaseflowIT/flutter-permission-handler/blob/develop/ios/Classes/PermissionHandlerEnums.h
      # e.g. when you don't need camera permission, just add 'PERMISSION_CAMERA=0'
      config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= [
        '$(inherited)',

        ## dart: PermissionGroup.calendar
        # 'PERMISSION_EVENTS=0',

        ## dart: PermissionGroup.reminders
        # 'PERMISSION_REMINDERS=0',

        ## dart: PermissionGroup.contacts
        #  'PERMISSION_CONTACTS=0',

        ## dart: PermissionGroup.camera
        # 'PERMISSION_CAMERA=0',

        ## dart: PermissionGroup.microphone
        # 'PERMISSION_MICROPHONE=0',

        ## dart: PermissionGroup.speech
        # 'PERMISSION_SPEECH_RECOGNIZER=0',

        ## dart: PermissionGroup.photos
        # 'PERMISSION_PHOTOS=0',

        ## dart: [PermissionGroup.location, PermissionGroup.locationAlways, PermissionGroup.locationWhenInUse]
         'PERMISSION_LOCATION=0',

        ## dart: PermissionGroup.notification
         'PERMISSION_NOTIFICATIONS=0',

        ## dart: PermissionGroup.mediaLibrary
        # 'PERMISSION_MEDIA_LIBRARY=0',

        ## dart: PermissionGroup.sensors
        # 'PERMISSION_SENSORS=0'
      ]
    end
  end
end

颤动代码

Future<bool> checkForDevicePermission() async {
    var status = await PermissionManager.checkForPermissions(
        Platform.isAndroid? PermissionManager.androidPermissionsList:PermissionManager.iOSPermissionsList);
    if (status != null) {
//status returned here is PermissionStatus.unknown for all permissions 
//further code
       }
}

//PermissionManager Function
static Future<Map<PermissionGroup, PermissionStatus>> checkForPermissions(
      List<PermissionGroup> permissions) async {
    List<PermissionGroup> neededPermissions = List<PermissionGroup>();
    for (var permission in permissions) {
      permissionStatus =
          await PermissionHandler().checkPermissionStatus(permission);
      if (permissionStatus == PermissionStatus.unknown ||
          permissionStatus == PermissionStatus.denied) {
        neededPermissions.add(permission);
      }
    }
    if (neededPermissions != null && neededPermissions.length > 0) {
//getting the all permission status means granted or denied for which are requested to user
      try {
        Map<PermissionGroup, PermissionStatus> permissionsStatusList =
            await PermissionHandler().requestPermissions(neededPermissions);
        print(permissionsStatusList);
        return permissionsStatusList;
      } catch (e) {
        print(e.toString());
        return null;
      }
    } else {
      return null;
    }
  }

调试控制台请求权限时没有错误日志

Answer 1

您的 Pod 文件不正确。它的 cmets 说： # 您可以在此处删除未使用的权限 # 更多信息：https://github.com/Baseflow/flutter-permission-handler/blob/develop/permission_handler/ios/Classes/PermissionHandlerEnums.h # 例如当您不需要相机权限时，只需添加 'PERMISSION_CAMERA=0'

因此，如果您不想使用定位服务并且不想请求与定位服务相关的许可，那么只需写下以下行： 'PERMISSION_LOCATION=0',

由于您已经写了上面的代码，在构建 Pod 时，会从 permission_handler 包中排除与位置权限相关的代码。因此，即使您从颤振代码中调用位置权限弹出窗口，它也将始终返回权限状态未知。

Answer 2

我在 iOS 14.1 上遇到了这个问题——它在模拟器上工作，但在 TestFlight 和通过 USB 的真实设备上失败。

我最初的位置调用是：

/// Bad
await Permission.location.request().isGranted

并将其更改为这样，它按预期工作：

/// Good
await Permission.locationWhenInUse.request().isGranted

还有Permission.locationAlways.request()....